Great teacher. I've spent a lifetime using and maintaining motors of all types. I have already forwarded this to two others. A slight aside tip:- motors often have pulleys or sprockets on the shafts. It is a constant problem trying to get a suitable puller to fit for pulling them off. So now I drill and tap three spaced holes in all sprockets and pulleys. I have made a set of small pullers with matching holes to the threaded holes in the pulley/sprocket, on PCD 20mm,30mm, ..etc. In the center of these plates I have tapped a central hole for jacking bolt. To pull off, three set screws pass through holes in pull plate and into the pulley. Then the jacking bolt engages against the shaft. They work great. The pull plate without screws is used to position the three holes before tapping. I can't attach a photo-sorry.
The first 1:30 taught me volumes. I never knew that about capacitor start. No doubt this plays down to smaller motors such as fans and such too. Thanks!
I went to college for HVAC and I now 10 plus years later realize it wasn't that the motor repair course itself that was difficult . It was our instructor lmao. He hasn't watched any of your videos 😂 haha I have watched a good number of the videos. They have been edited well, you speak clearly and your personality is in my opinion what makes it so easy to learn. I don't comment often and I felt I should just to give you some feedback and say thank you for all the work, time and knowledge you have shared with us all. My grandfather used to say you start out with a mind full of ignorance and knowledge is the only way to be rid of it. So I believe if you fill your mind with knowledge then ignorance has no place and we all should share and pass on our knowledge to help cure the ignorance epidemic as he called it.
My instructor boasted he taught for 25 years and knew NOTHING. I had to teach myself. Sure wish I had this video then. Sure wish you were my instructor!
@@TEXAS-SMITH Another HVAC guy here. Retired now. But if I'd had this guy spend 4 hours with me in the beginning of my career I'd have become a top-notch tech far quicker. Motors (electricity) isn't hard, but finding someone who has the knowledge AND can get it across simply is difficult. Good instructors are hard to find and worth their weight in gold. I WISH I were that guy. I can do it, but teaching someone else? A skill I don't possess and one I think you can't learn. Either you have it or you don't. He does. I don't.
For phrases like "Help cure the ignorance epidemic", your Grandfather must have been a great person. I also had the fortune of meeting a great self-taught engineer that told me: "Knowledge is like nice hot food... you eat it and you will be nourished, but just don't keep it inside you, for even the best food wil have to be thrown out or it will rot inside you!: Knowledge NEEDS to be disseminated and shared freely. That is what humanity is needing."
Many times, I believe someone is "use" to speaking in a certain vernacular when speaking with someone with experience in the field. However, more difficult for a novice to understand. I believe some people are just better at reading their audience and adjusting. We are all good at something's and not so good in others.
GREAT TUTORIAL without having to listen to LOUD & OBNOXIOUS music in the background!! I look forward to viewing a lot more of your content! Thanks again!!
3:08 "You do not want to hook this up to AC current, or it'll explode, and we don't want that." Somewhere in Canada, Medhi Sadaghdar (ElectroBoom) just felt a chill down his spine.
I can hook polarized capacitors up to AC. There's a trick to it. If you want a pair of positive capacitor leads you just need two capacitors. Hook the grounds together and there you go. Like this + -||--||- + Supra genius! For real it works. I've done it. Although it takes some math to calculate the capacitance you're going to get out of series capacitors. I made a 14 uF capacitor out of a string of 100 and 22 uF capacitors once though. It was like a 600VAC cap too. The voltage rating adds in series.
@@1pcfredBut still most electrolytics don't like too large AC voltage, because they are designed to smooth out DC, so they are good to have AC component nearly 10 or 20% of DC voltage (say, 12 volts DC but with ripple of 1,2 volts AC), with frequency 100 or 120 Hz (double the freq. because of bridge rectifier). In conditions like these, current flowing through capacitor is not too much: capacitors may withstand it all day :) But if we take two of these capacitors the way you say and hook up to 12 volts AC, they may blow out pretty quickly because of excessive current they weren't designed for... But yes, connections like these are OK for crossover filter in loudspeaker where the current through it is limited by coil resistance. Wouldn't recommend to put them as start capacitor for the motor though.
@@1pcfred If you do that, the voltage rating does NOT add up. In that arrangement the oxide film in the electrolyte has to act like a diode in one of the capacitors in each half cycle of the AC. This also generates a lot of heat and can damage the caps. So in general apart from some audio applications it´s not a good idea to use that arrangement. It won´t last long.
My Derek used to fix everything that plugged in. Since he passed away unexpectedly last year, I’ve struggled because I didn’t know how and it just brought up grief and frustration. This video is so amazing- makes it easy to understand and the chill way of being, presence makes it feel easy to approach. Going to take my motor apart now and I’m both jazzed… and grateful. Thank you!
@@jarodmorris611 let him that's a good way to start out. Plus it is better than what I started working on at 7. I wasn't supposed to bring junk home. So I started working on mom's appliance's. After the vacuum incident she started to let me bring junk home.
Calm is good. By the way, if you find brushes that are physically too big they can sometimes work since graphite is so easy to trim down with a file to fit. Just keep spring tension in mind, the spring is there because the brush carbon wears down over time even though it is nicely slippery, so the spring maintains tension against the rotor contacts as the brushes become shorter. Too little tension from a brush assembly repurposed and they might not make as good a contact. Too much and they would wear faster. Hope that helps.
Jeremy - I searched UA-cam for three days why my new treadmill motor sparked and tripped the circuit breaker when I installed it on my treadmill. You are the only one on UA-cam explained exactly the reason why. Thanks.
I do the same . Hes got that great teacher voice and a true love showing us how this works. No one else on the tube is cutting motors apart just to show the insides of this stuff..
Personally I believe you to be outstanding for the common man and most basic electrical applications. I went to a votech school just out of highschool for basic electronics and have forgotten more than I ever learned but with that out of the way I do actually use your channel to brush up on my knowledge from time to time as I find the way you present it to be very easy to understand and educational as well so please Jeremy, keep up the good work and keep these videos going even if it means revising a few basics from time to time..
You'll also get that hum on a 3 phase motor if one of the phases is wired incorrectly or if the power from the utility company has a phase out for repair in their 3 phase service. Generally, when you hear that sound, turn the motor off, because it'll make a whole lot of heat in a hurry because electric motors draw the most current (and create the most heat) while they're not spinning (they call this a 'stall').
You are THE man! TY very much. Just inherited grandpas old shop and the bandsaw wouldn't start. Disconnected the capacitor (with it connected the circuit would trip the breaker) and now I can run the saw by manually starting the wheel. New part ordered, you saved me from buying a whole new motor!
BY FAR THE BEST VIDEO ON UA-cam. THE WINNER AND CHAMPION!!!!! I’ll tell you why. NO ADS ANYWHERE. NO PLUGS. NO MUSIC. NO NOISE. NO BACKGROUND NOISE. NO BULLSHIT. NO BEGGING FOR MOBEY FOR YOUR CHANNEL BECAUSE YOU HAVE A JOB. What we do get is, a clear professional explanation of if what the video is about, and you speak clearly. I’m a youtube junky and i watch a lot of car videos, woodworking videos mostly. Everyone is constantly asking for monetary support thru patreon, and there are several Ads right up front, many Ads in between, and several Ads at the end. All this garbage on “every video”. I wonder now when i’ll ever come across another clean no bullshit video like this. Probably never, unless i watch your videos. This was a real treat. I thank you !!!!!!!
Thank you , I did have a Jett belt grinder stop working with that hum, I could get it going if I spun in it by hand and that got old so I stopped using it. Saw your video this morning and 10 minutes later I had a capacitor from a junk washing machine in my hands and replaced the bad one in my grinder with it.....it works perfectly now.
Great videos. I wish I saw your videos before I took apart my old washer. Took the motor, belt, sprockets and pulley but not the capacitor. I see washers all the time, especially frontload washers with failing bearings. That's how I got our washer for washing the dogs' towels and bedding. Just need to change the bearings, but unlike salvaging parts, need to remember how to put it back together.
Thank you so very much for posting this video. It gave me bravery to do surgery on my 2004 minivan starter. I was successful because of your tips. Had the starter tested at O'riley's today. A little dap of thread locker drying overnight on those long screws. Installation tomorrow. you saved my family $350 for a new starter. Thank you.
Wanted to thank you for this video. My compressor has been popping breakers and starting slow for almost a year, to the point I've been avoiding all of my air tools until I had time to figure out the problem properly. Turns out it was the contacts on the centrifugal switch, just as you pointed out in this video. I had replaced both caps and was at a loss.. as of last night my 28 year old compressor motor is running good as new, all thanks to you. So thank you, sincerely.
Thank you I have always approached motors with fear and trepidation. Have been watching your videos and have gotten more comfortable on the subject. Thank you for your efforts!
Great video as all of yours are. A thermal fuse inserted in the outer windings failed on a fan motor, it was difficult to access but after cutting some waxed winding string and carefully separating wires from the fuse I got it out. Ordered replacement thermal fuse and soldered it back in place then pulled everything back together with new waxed string. Sprayed two coats of clear urethane on the repaired area for insulation. Then cleaned off years of gunk from the bushings and added new oil to the foam pads for the bearings, reassembled and tested. Now runs great and should for years.
Excellent video! I don't have an unusual fix or anything like that but I have a, hopefully, useful tip...use a paint marker to write the pertinent info regarding the motor on the motor or on a nearby and visible surface. Things like phase, power, frame size, rotation direction and if reversible, really help when servicing equipment since all the data can be easily accessed to order parts or even a replacement without having to tear down the equipment, which inevitably leads to scrounging for last minute replacements due to lost parts. And if servicing a motor in a harsh environment, I normally include upgrading the bearings and seals at that time also. It prevents callbacks for failures of same since everything got jostled and now the integrity of those parts might be compromised (or they weren't all that good to begin with). Great video. Thanks for sharing your knowledge!!!
Funny. 3 common motor problems/fixes mentioned and I encounter 3 of them during last 3 years :-). 1st (3 years later) - worn brushes in washing machine motor (replaced by new ones). 2nd (last year) - failed capacitor in lawn mower (replaced by new one). 3rd (this year) - blown bearing in other lawn mower (replaced by new one). As I am a hobbyist I am proud that I found out what the problems were (with the help of internet) and was able to fix it. So this video is 100 % true!
With a lot of hand held power tools such as drills and routers, that have plastic bodies, you might get a short 'noisy' phase but often the first sign is 'burning plastic' smell followed by smoke as the housing starts to overheat. If you are quick switching it off, you will quite often get away with just replacing the bearing. If you keep running it you will melt the body and it will be a write off. Excellent video fella - no music or gimmicks - great !
Jeremy, I'm so glad I found your channel. You have a great demeanor and natural ability to put people at ease with the subject matter, this in turn allows for a comfortable learning environment. I enjoyed listening to your clear and concise delivery. You've actually managed to make learning enjoyable for this old man. Please continue making more DYI instructional videos. Thank you.
AMEN! Very well said! I don’t know what I could add other than Mr United Civil Supply expressed my thoughts ver well. Mr Fielding I don’t know your career but you are an awesome instructor! Thank you!
Who ever downvotes this video should comment and explain exactly what or why they did so but I suspect its either jealousy or envy. Like every single video I have seen of yours this one was clear, informative, educational, correct, and well said. Your passive no nonsense explanations make for understanding the seemingly complicated tasks you present. Well done Jeremy. I, like many others on your channel wish you the best and will help you out on patrion. So if you downvote, tell us what you found displeasing and why otherwise your just hating to hate you big hatey. And u need to rethink your whole life.
Ok I could see someone being mad because they were looking for something and started watchine your video and becoming so absorbed and watched the whole host of videos u have thus sidetracking their original purpose and thinking “ive wasted my time.” But thats no reason to downvote!
Having a real hard time getting a 50+ year old Craftsman radial arm saw working and so far everything is pointing to the motor clutch and/or capacitor. Your video is absolutely awesome and answers all the questions I've got [and haven't been able to find], and your props are outstanding!! Spot on and thank you for creating and posting this!
My dad did home repairs on car generators. When he replaced the brushes he checked the comutator?? Spelling?? (What the brushes make contact with) for wear. If the brushes had worn grooves in the copper, attached an electric drill to the other end of the shaft and resurfaced the comutator with fine sand paper on a flat surface, strip of metal or similar while rotating the shaft with the drill.
Thanks for a most informative and beautifully done presentation (as always), Jeremy. BTW, If one is dealing with an archaic, discontinued model brush motor, and cannot find an exact replacement carbon brush, DIY by obtaining a dimensionally larger brush, and mill it down to the needed size using abrasive paper or manicure file.
Ill add to the choir. I'm a near 60 yo woman who steered well clear of electrical, mechanical, computer repair for years. In the last 1/2 decade i cant seem to get enough. I actually love learning and doing my own repairs. Its super gratifying. Sure helps understanding some fundamentals beforehand and theyre hard to find, whether poor instruction or poor visuals. Youve knocked both out of the park. Ill be back for more lessons as Im doing my part to keep my landfill contribution low while having a second run at learning new things. Bravo.
One thing I've done in an emergency situation on a sealed end cap bearing that's beginning to get noisy and slow it down is to drill a 1/8" hole in the plug cap, then add some electric motor oil 5-6 drops, then, clean cap surface around the hole and cut a small piece of aluminum tape to cover the hole. IT was on an outside air conditioning condenser unit.That was 2 yrs ago and it's still going!
I've been taking motors apart since I was old enough to pick up a screwdriver. I share your fascination with them! I remember being 3 years old and wondering how the second hand moved on my dad's electric clock without anyone touching it. my parent's explanation "Electricity makes it move" wasn't good enough for me lol
Regarding the bearings: the "z" following the number (6042z or whatever) often refers to the bearing being sealed on at least one side. Some brands have different designation for a double sealed bearing, specifically by adding another "z" (6042zz). When searching for a replacement, ensure that your replacement is sealed on both sides( or only one side if that's what you need). I learned this the hard way when replacing the bearing on my kitchen aid mixer. Bearing was double sealed and had 6042z on it, I bought a different brand bearing with the same number. The bearing was an exact fit, but only sealed on one side. I had to get a 6042zz (not the actual bearing number, I can't recall the exact number).
I admire this gentleman..very clear and excellent at explaining the workings of the motor, what I admire most of all is the fact he shows not a shed of arrogance or ego..which I found on many a UA-cam video..that’s when I stop the video and move on..we are always learning and what you don’t know someone else does..so no one knows it all (yes I’m stating the obvious) stay humble folks and let’s just help and teach each other.
Dear Jeremy, thank you for coming to my rescue with regard to a problem with our dust extractor motor. After a goof run {blast gate closed on both arms whilst motor ran for five minutes} the motor only hums on startup. Although the motor got a bit warm, I can’t believe that anything melted because the ambient temperature was so low - around 12˚C. The best bet is that the capacitor has failed. Let’s see if that is correct. I have watched several of your UA-cams and have always been impressed with your presentation. It is clear that your knowledge is supreme but you do not come across as an arrogant know-it-all but a gentle and peaceful teacher. I don’t know what you do for a career but if you have ever thought of teaching, there are thousands of kids out there that would thrive on your approach. All the best.
This is great. I've had a few problems with Baldor motors failing (coffee roasting equipment.) I am quite positive that the capacitor ends up being the problem with at least 2 of them. If I swap them out (I'm not very familiar with motors, obviously, but I am competent with electronic soldering) and they work as normal, then you've saved me a few hundred bucks. So of course I'm now a subscriber.
Our well pump has failed several times due to power surges and/or lightning. There is a control box at the well head and the pump is 600 feet below. In each case the start capacitor has blown along with the relay that switches from the start to the run capacitor once the pump is running. This motor is served by 3 wires, one of them sending current to the start winding. Once the motor is running the start winding actually generates a current which tells the relay to change to the run capacitor. After replacing the control boxes at about $500 each, including labor, I figured out how to replace individual components within the control box for about $50 and my labor. Better yet, I found that by installing surge protectors on both sides of the circuit (on the power supply side as well as the demand side which required a 3 phase protector) I can stop surges from both the power supply side as well as from lightning back feeding from the pump 600 feet below. We haven't has a control box failure since I installed the surge protectors.
Thanks Jeremy, this video demistified the repair I'm doing on a 40 year old tablesaw motor. The demonstrations lined up with my initial observations of my motor in such a way that I was able to order the correct replacement parts with confidence! Thanks!
very informative indeed..One tip from me is to collect all types of motor brushes as they are easily sanded to size and soldered to fit different apps..Thanks For your efforts Jeremy
I'm a kind of DIY guy, and professionally, I'm a Chem Engineer w42 yrs working, and still learning... Please receive my admiration for all your knowledge, dedication and the inspiration you give us. Liked, Suscribed and 'Belled'. THANKS A LOT!
I just inherited a delta 50 850 dust collector that doesn't start. I replaced the cap (thought there was only one doh!) so now I have to replace the run cap, will share after. I'm so glad you are such a good resource for motors and clever stuff. Thanks
What a great video! Thank you for making it. Only problem I have had with a small electric motor that you didn't mention was a starter motor on an old truck (6 volt DC): a small piece of metal got lodged between the rotor and the field windings and the motor would not spin at all until that was removed. While it was apart I put the rotor in my drill press and used emory cloth to clean the commutator bars as they were filthy.
Seriously dude, how did you get to be so "cool"? To keep it simple, me smart too. I'm a "know it all". There is very little the average Joe could school me on. But your a very well composed individual. I admire your dedication to staying on topic, but allowing your opinions be heard. I'm sure it is well practice and comes with experience. None the less I for one am filled with joy to see a presumably happy individual do a craft all the while enjoying themselves. In my opinion one of many fundamentals of teaching I presume. My comment is well crafted, yes. But only because I have plenty of time to correct any errors, but you my friend are gifted with a ability to staying intelligent and humble in equilibrium. Thus creating little detectible error AKA a wise man. Opposing forces in balance. Good man. Even better role model. Speaking from the heart when I say, "God bless you". Teach on teacher!
Hi Jeremy, Just fixed my 2hp 120V spa pump that was just buzzing like when the capacitor was disconnected in your video. Capacitor was fine, it was the contacts on the centrifugal switch that weren't making contact when the motor was stopped like they're supposed to. A little bit of *gentle* sanding with a very fine grit sandpaper has fixed it for now. Hope this helps somebody if the capacitor-swap fix doesn't work. Saved me ~$250 for a new motor!
Basically agree. My experience is about an equal number of faulty capacitors and dirty centrifugal switch contact, often a piece of sawdust preventing closure
Hi Jeremy. Great videos. Thank you! Could you touch upon these Fasco D132 3.3-Inch General Purpose Motors, 1/20 HP, 115 Volts, evap motors. I've had 3 of these quit on me after 2months of running. The first one came with the evap unit and lasted the longest at 3yrs. The 2nd I found on Amazon, and lasted 10mo's. , The third was a FASCO, and it ony lasted 2 months! At $60-$70 a pop, I'd like to begin repairing instead of replacing.
Thanks Jeremy! This helped me out a lot. I am repairing the electric window motors on a 1988 Mercedes Benz 300e. You have helped me figured out what the problem is.
This lecture was clear and concise without music so the lesson could be heard. Other "instructors" using UA-cam to to help the needful could benefit for this guy as a mentor. Thanks! JD
I had a problem with an old drill press motor overheating with little to no load on it. Ended up being the centrifical starting switch. It wouldn't disengage when the motor got up to speed. A few taps with a hammer and some WD-40 got everything working again. I didn't have to disassemble anything fortunately.
THANKS! You are an awesome teacher. Wanted to tell you about a little trick I use when bearings, (mostly the copper sleeve types), are worn and getting sloppy, and its not convenient at the time to replace: I look for super thin strips of brass or copper, (I've used everything from silver scraps to steel spring out of a tape measure), that I oil up and slide between the shaft and bearing; (sometimes a tiny sliver will do it), and it helps get tolerances back where they need to be. Keep it oiled and it'll last long enough to finish that project . . .
The capacitor failure is a common cause of loss of air conditioning. You can fix it before the HVAC guy could even get to your house. It sounds just like Jeremy demonstrated (outside unit)
technosaurus - Had exactly that happen in a Florida summer years back. Pointed my oldest child to Google to research the part. I helped pull the motor & capacitor (that is a BIG cap). Had her rewire it, we mounted it back, and away we went. Good times.
Home Depot and Lowes stopped carrying them, got mine from amazon cheap but took 3 days to receive. I recommend anyone with a house over ten years old (since last cap replacement) to consider stocking one for when it does fail so you don't have to wait and listen to your family complain. Once I had the part it took 2 minutes to replace.
@@asterix2ksi damn right, was just thinking I had better go order one since finding one in stock will be impossible (especially during this Corona summer)
i miss when i work on motor shops for 40 years fix all kind motors and rewinding them + converting them for a different torque , voltage, frequency and speed , good job on you video,keep work on this babies ,i love MOTORS
Hey Jeremy. I just wanted to say hi and thank you. This is a great channel I've learned a lot from it and I've watched a bunch of the videos a couple of times. As a result of your videos I figured out that it was the capacitor on the pool pump that was the problem and I replaced it and it worked fine. Plus it was really easy to do. So thanks again. I really enjoy everything about these videos from the information to your calm demeanor and personality and big smile and involving your kids too just wonderful.
I've long had a high level understanding of almost all of these components but I had a need to repair and your illustrative lesson helped me get it solidly and fix my motor. Thank you.
Awesome video!! I learned so much from you and I definitely know where to start (pun intended) now in troubleshooting and fixing the dead motor for my Sears Craftsman table saw. I also love how you leverage your skills and curiosity to appreciate and demonstrate the details of some fundamental engineering. I’m definitely subscribing and giving you the thumbs up so hopefully you can make more of these value-added videos!! Thanks so much!!
Thank you for your great videos. I have a 8 inch wen bench grinder that won't start the capacitor is good and the switch is good . I don't know about the the reostat for speed but this thing has a a bunch of electronic stuff I don't understand . Can I by pass that a will it work like a regular electric moter? Thank you
This man has the most Detailed on any motor that you could think of he is a human brain at this I’m glad I found him on the Internet again thanks bro thanks
You are doing a great job, thanks. Recently had a 1/2 hp induction motor given to me which wasn't working. Hummed and didn't spin when power was turned on, but would when assisted. Uncovered the start cap and it was leaking electrolyte. Out a new one in and still didn't start. Accessed start winding centrifugal switch. It looked fine and wasn't welded closed. Filed points and lubed pivot points and put back together and its now running. Now I have a free $100 motor.
Been seeing your videos when they pop up in my feed. Watched a bunch. The fact that you say "if I earned it" at the end is the most humble way of getting subscribers I have ever seen. And It's why I just FINALLY subscribed.
🙏 Thank you for sharing your time with us!! Question: Is there a way to make a foot control (like a sewing machine has) to control the speed of a Dremel 295 variable speed rotary tool? I'm a self taught bench jeweler and I need both hands when I'm working on silver or stone setting. I like to repurpose, recycle, repair and sometimes make my own tools. Thanks again for your work!!!
Build a small U shape piece out of boards. Get a dimmer switch, pull the knob off, attach it to one of the side boards. Run a dowel as a shaft from the dimmer switch's control to the opposite board where you put a bushing of some kind (can be just an old piece of plastic with a hole in it, like a piece of cutting board, shim made of milk jug, an empty tape roll or slice of a pen body since it's just to keep the motion smooth and supported). Attach a pedal to the shaft slightly off-center, like a treadle. This will reduce the power of the dremel at the lower speeds as well, but I think the inbuilt speed control for them may already do that. Also it's important that the dimmer switch's range is sufficiently small to fit the range of the pedal, and that you orient it so that "low" is in the position you prefer - pedal fully engaged or foot fully relaxed - else you may have a struggle. As an alternative, you can do it with a sliding dimmer switch. Put the pedal onto a hinge and add a return spring. Optionally a strap over the pedal so you can lift up with your foot too instead of just relying on the spring. (tip from the bike world used in coaster brakes and fixed gear bikes...)
Your teaching an 83 yr old woman now! Oster juicer 8138. Hums but won't turn over. This motor is very much smaller than what you covered. I can't recognize the different parts on this small size. I will look at your other links. They might help me. Thanks so much. You are so clear in your instructions.
Electroboom is a electronic channel that has a running joke where he's always electrocuting himself. The motor starter capacitor can give you bit of a shock if you touch it after running. (first hand experience)
@@pixifixi2076 my brother pulled the capacitor out of one of those electric fly swatters. He loved charging it up, then tossing it to his friends to catch.
Thanks Jeremy. I have a Sears air compressor motor which gave me trouble. It blew a couple starting caps because dust and spray paint made the centrifugal starting weights stick on the shaft. I opened the motor, chipped the dust/paint off the moving surfaces and reassembled it. It has been working good for a number of years now. JwgK
Awesome Video... I was once given a chop saw and told I could keep it, even if I fixed it. After taking it apart I found that one of the carbon brushes wasn't making contact with the commutator. I took the carbon brush out and I found that a bit of weld spatter down the channel which seats the carbon brush. Used hammer and screwdriver to knock it off and boom... still going strong today!
Years ago our furnace blower motor had a bad bushing. Rather than bearings in the shaft there were bronze bushings. My dad fixed it with what he had, a short length of copper pipe. He cut it to length and cut it lengthwise so when tapped into place it confirmed to the right diameter. The fix lasted for many years, till the whole furnace was replaced. I appreciate the excellent content. Thanks
Thank you, Thank you, Thank you, for answering all the important questions you could possibly have, and sparing us from the redundant "opening the box" parts like most of these. This puts you at #1 in my book. You da man!
About to have to mail my motor 2000 miles for a rewind now I believe I’ll replace the bearings first it does just what you Explained shutters when under a load and got worse
The coolest, calmest, CLEAREST, motor guy on the planet.
agreed
Wire inside connected to the windings pulled out. Is there a way to fix it?
Great teacher. I've spent a lifetime using and maintaining motors of all types. I have already forwarded this to two others. A slight aside tip:- motors often have pulleys or sprockets on the shafts. It is a constant problem trying to get a suitable puller to fit for pulling them off. So now I drill and tap three spaced holes in all sprockets and pulleys. I have made a set of small pullers with matching holes to the threaded holes in the pulley/sprocket, on PCD 20mm,30mm, ..etc. In the center of these plates I have tapped a central hole for jacking bolt. To pull off, three set screws pass through holes in pull plate and into the pulley. Then the jacking bolt engages against the shaft. They work great. The pull plate without screws is used to position the three holes before tapping. I can't attach a photo-sorry.
Agreed he defiantly is he is my goto guy when it comes to them
@@jossfitzsimons thats a good idea with the tapped holes I can't tell you how many times I have had problems with Lilly's or gears being stuck
I am 79 years old and you just explained a lot of things I should have known years ago. You are the Man
This guy just seems genuinely likeable as well as gifted with a real teaching ability.
The first 1:30 taught me volumes. I never knew that about capacitor start. No doubt this plays down to smaller motors such as fans and such too. Thanks!
I went to college for HVAC and I now 10 plus years later realize it wasn't that the motor repair course itself that was difficult . It was our instructor lmao. He hasn't watched any of your videos 😂 haha I have watched a good number of the videos. They have been edited well, you speak clearly and your personality is in my opinion what makes it so easy to learn. I don't comment often and I felt I should just to give you some feedback and say thank you for all the work, time and knowledge you have shared with us all. My grandfather used to say you start out with a mind full of ignorance and knowledge is the only way to be rid of it. So I believe if you fill your mind with knowledge then ignorance has no place and we all should share and pass on our knowledge to help cure the ignorance epidemic as he called it.
My instructor boasted he taught for 25 years and knew NOTHING. I had to teach myself. Sure wish I had this video then. Sure wish you were my instructor!
@@TEXAS-SMITH
Another HVAC guy here. Retired now. But if I'd had this guy spend 4 hours with me in the beginning of my career I'd have become a top-notch tech far quicker. Motors (electricity) isn't hard, but finding someone who has the knowledge AND can get it across simply is difficult. Good instructors are hard to find and worth their weight in gold. I WISH I were that guy. I can do it, but teaching someone else? A skill I don't possess and one I think you can't learn. Either you have it or you don't. He does. I don't.
For phrases like "Help cure the ignorance epidemic", your Grandfather must have been a great person.
I also had the fortune of meeting a great self-taught engineer that told me: "Knowledge is like nice hot food... you eat it and you will be nourished, but just don't keep it inside you, for even the best food wil have to be thrown out or it will rot inside you!: Knowledge NEEDS to be disseminated and shared freely. That is what humanity is needing."
I tried that once I learned nothing from the instructor big waste of money
Many times, I believe someone is "use" to speaking in a certain vernacular when speaking with someone with experience in the field. However, more difficult for a novice to understand. I believe some people are just better at reading their audience and adjusting. We are all good at something's and not so good in others.
GREAT TUTORIAL without having to listen to LOUD & OBNOXIOUS music in the background!! I look forward to viewing a lot more of your content! Thanks again!!
3:08 "You do not want to hook this up to AC current, or it'll explode, and we don't want that."
Somewhere in Canada, Medhi Sadaghdar (ElectroBoom) just felt a chill down his spine.
I can hook polarized capacitors up to AC. There's a trick to it. If you want a pair of positive capacitor leads you just need two capacitors. Hook the grounds together and there you go. Like this + -||--||- + Supra genius! For real it works. I've done it. Although it takes some math to calculate the capacitance you're going to get out of series capacitors. I made a 14 uF capacitor out of a string of 100 and 22 uF capacitors once though. It was like a 600VAC cap too. The voltage rating adds in series.
@@1pcfredBut still most electrolytics don't like too large AC voltage, because they are designed to smooth out DC, so they are good to have AC component nearly 10 or 20% of DC voltage (say, 12 volts DC but with ripple of 1,2 volts AC), with frequency 100 or 120 Hz (double the freq. because of bridge rectifier). In conditions like these, current flowing through capacitor is not too much: capacitors may withstand it all day :) But if we take two of these capacitors the way you say and hook up to 12 volts AC, they may blow out pretty quickly because of excessive current they weren't designed for...
But yes, connections like these are OK for crossover filter in loudspeaker where the current through it is limited by coil resistance.
Wouldn't recommend to put them as start capacitor for the motor though.
@@1pcfred If you do that, the voltage rating does NOT add up. In that arrangement the oxide film in the electrolyte has to act like a diode in one of the capacitors in each half cycle of the AC. This also generates a lot of heat and can damage the caps.
So in general apart from some audio applications it´s not a good idea to use that arrangement. It won´t last long.
@@Basement-Science the added surface area dissipates more heat. That's why it works that way.
👍🤣🤣🤣
My Derek used to fix everything that plugged in. Since he passed away unexpectedly last year, I’ve struggled because I didn’t know how and it just brought up grief and frustration. This video is so amazing- makes it easy to understand and the chill way of being, presence makes it feel easy to approach. Going to take my motor apart now and I’m both jazzed… and grateful. Thank you!
Sorry for your loss familiar with your grief. Jeremy is pretty great, hadn't watched him in a while. 👍✌
You are an *AWESOME* instructor...very informative, easy to understand, and downright interesting! :)
I let my kids watch any video you upload. Now my 9 year old wants to go get vacuum cleaners, TVs, and anything else on the curb
@@jarodmorris611 let him that's a good way to start out. Plus it is better than what I started working on at 7. I wasn't supposed to bring junk home. So I started working on mom's appliance's. After the vacuum incident she started to let me bring junk home.
T Clodfelter uppipp
I'm so glad I found this channel.
Calm is good. By the way, if you find brushes that are physically too big they can sometimes work since graphite is so easy to trim down with a file to fit. Just keep spring tension in mind, the spring is there because the brush carbon wears down over time even though it is nicely slippery, so the spring maintains tension against the rotor contacts as the brushes become shorter. Too little tension from a brush assembly repurposed and they might not make as good a contact. Too much and they would wear faster. Hope that helps.
Jeremy - I searched UA-cam for three days why my new treadmill motor sparked and tripped the circuit breaker when I installed it on my treadmill. You are the only one on UA-cam explained exactly the reason why. Thanks.
When I see someone with a motor problem, on FB or UA-cam, I always recommend they watch your videos. You are my electric motor guru.
I do the same . Hes got that great teacher voice and a true love showing us how this works. No one else on the tube is cutting motors apart just to show the insides of this stuff..
@@waitemc ...and he puts it in a way that anyone can understand.
Personally I believe you to be outstanding for the common man and most basic electrical applications. I went to a votech school just out of highschool for basic electronics and have forgotten more than I ever learned but with that out of the way I do actually use your channel to brush up on my knowledge from time to time as I find the way you present it to be very easy to understand and educational as well so please Jeremy, keep up the good work and keep these videos going even if it means revising a few basics from time to time..
Holy shit, I must have heard that hum a dozen times and just figured the motor was a loss. You’ve opened my eyes.
You'll also get that hum on a 3 phase motor if one of the phases is wired incorrectly or if the power from the utility company has a phase out for repair in their 3 phase service.
Generally, when you hear that sound, turn the motor off, because it'll make a whole lot of heat in a hurry because electric motors draw the most current (and create the most heat) while they're not spinning (they call this a 'stall').
@@jttech44 thanks, this is really insightful and good advice.
My 20" shop fan stopped working, thought it was a bad cap, to no avail; realized the windings had an open, I jumped the thermal fuse. Works good now.
I watched this ages ago, now I've just fixed my tumble dryer with an £8 part! Thanks! Saved me about £300!
You are THE man! TY very much. Just inherited grandpas old shop and the bandsaw wouldn't start. Disconnected the capacitor (with it connected the circuit would trip the breaker) and now I can run the saw by manually starting the wheel. New part ordered, you saved me from buying a whole new motor!
Your ability to clearly explain is equal to you knowledge and that is a rare quality thank you for the effort
BY FAR THE BEST VIDEO ON UA-cam.
THE WINNER AND CHAMPION!!!!!
I’ll tell you why.
NO ADS ANYWHERE.
NO PLUGS.
NO MUSIC.
NO NOISE.
NO BACKGROUND NOISE.
NO BULLSHIT.
NO BEGGING FOR MOBEY FOR YOUR CHANNEL BECAUSE YOU HAVE A JOB.
What we do get is, a clear professional explanation of if what the video is about, and you speak clearly.
I’m a youtube junky and i watch a lot of car videos, woodworking videos mostly.
Everyone is constantly asking for monetary support thru patreon, and there are several Ads right up front, many Ads in between, and several Ads at the end. All this garbage on “every video”.
I wonder now when i’ll ever come across another clean no bullshit video like this.
Probably never, unless i watch your videos.
This was a real treat.
I thank you !!!!!!!
Thank you , I did have a Jett belt grinder stop working with that hum, I could get it going if I spun in it by hand and that got old so I stopped using it. Saw your video this morning and 10 minutes later I had a capacitor from a junk washing machine in my hands and replaced the bad one in my grinder with it.....it works perfectly now.
You mean that old wash machine out on your front porch?
Great videos. I wish I saw your videos before I took apart my old washer. Took the motor, belt, sprockets and pulley but not the capacitor. I see washers all the time, especially frontload washers with failing bearings. That's how I got our washer for washing the dogs' towels and bedding. Just need to change the bearings, but unlike salvaging parts, need to remember how to put it back together.
Thank you so very much for posting this video. It gave me bravery to do surgery on my 2004 minivan starter. I was successful because of your tips. Had the starter tested at O'riley's today. A little dap of thread locker drying overnight on those long screws. Installation tomorrow. you saved my family $350 for a new starter. Thank you.
Wanted to thank you for this video. My compressor has been popping breakers and starting slow for almost a year, to the point I've been avoiding all of my air tools until I had time to figure out the problem properly.
Turns out it was the contacts on the centrifugal switch, just as you pointed out in this video. I had replaced both caps and was at a loss.. as of last night my 28 year old compressor motor is running good as new, all thanks to you.
So thank you, sincerely.
Thank you I have always approached motors with fear and trepidation. Have been watching your videos and have gotten more comfortable on the subject. Thank you for your efforts!
Well done, my friend. There is little I can add to what the exceptional reviewers have said below other than “thank you.”
Great video as all of yours are. A thermal fuse inserted in the outer windings failed on a fan motor, it was difficult to access but after cutting some waxed winding string and carefully separating wires from the fuse I got it out. Ordered replacement thermal fuse and soldered it back in place then pulled everything back together with new waxed string. Sprayed two coats of clear urethane on the repaired area for insulation. Then cleaned off years of gunk from the bushings and added new oil to the foam pads for the bearings, reassembled and tested. Now runs great and should for years.
Not sure if anyone else mentioned it or if you've already posted it but we all want to see a vid of you cutting open motors!!!!
Excellent video!
I don't have an unusual fix or anything like that but I have a, hopefully, useful tip...use a paint marker to write the pertinent info regarding the motor on the motor or on a nearby and visible surface. Things like phase, power, frame size, rotation direction and if reversible, really help when servicing equipment since all the data can be easily accessed to order parts or even a replacement without having to tear down the equipment, which inevitably leads to scrounging for last minute replacements due to lost parts. And if servicing a motor in a harsh environment, I normally include upgrading the bearings and seals at that time also. It prevents callbacks for failures of same since everything got jostled and now the integrity of those parts might be compromised (or they weren't all that good to begin with).
Great video.
Thanks for sharing your knowledge!!!
Thanks sir its a eye opener for me in now where you are great instructor now i can also help myself
Funny. 3 common motor problems/fixes mentioned and I encounter 3 of them during last 3 years :-). 1st (3 years later) - worn brushes in washing machine motor (replaced by new ones). 2nd (last year) - failed capacitor in lawn mower (replaced by new one). 3rd (this year) - blown bearing in other lawn mower (replaced by new one). As I am a hobbyist I am proud that I found out what the problems were (with the help of internet) and was able to fix it. So this video is 100 % true!
Wish Jeremy would have been a teacher when I was in school! He is awesome! So clear!
Thank you!!!!! Within the first 4 minutes I knew what was wrong with my scroll saw motor. Awesome detailed video! Thanks! 😁
This channel is amazing. I never knew how much I didn't know about electric motors, and how much I wanted to know, until now.
With a lot of hand held power tools such as drills and routers, that have plastic bodies, you might get a short 'noisy' phase but often the first sign is 'burning plastic' smell followed by smoke as the housing starts to overheat. If you are quick switching it off, you will quite often get away with just replacing the bearing. If you keep running it you will melt the body and it will be a write off. Excellent video fella - no music or gimmicks - great !
Jeremy, I'm so glad I found your channel. You have a great demeanor and natural ability to put people at ease with the subject matter, this in turn allows for a comfortable learning environment. I enjoyed listening to your clear and concise delivery. You've actually managed to make learning enjoyable for this old man. Please continue making more DYI instructional videos. Thank you.
AMEN! Very well said! I don’t know what I could add other than Mr United Civil Supply expressed my thoughts ver well. Mr Fielding I don’t know your career but you are an awesome instructor! Thank you!
Well said.. I agree whole heartedly as this is what I was trying to say but in far fewer words and much more concise.
totally agree with this comment.
Who ever downvotes this video should comment and explain exactly what or why they did so but I suspect its either jealousy or envy. Like every single video I have seen of yours this one was clear, informative, educational, correct, and well said. Your passive no nonsense explanations make for understanding the seemingly complicated tasks you present. Well done Jeremy. I, like many others on your channel wish you the best and will help you out on patrion.
So if you downvote, tell us what you found displeasing and why otherwise your just hating to hate you big hatey. And u need to rethink your whole life.
Ok I could see someone being mad because they were looking for something and started watchine your video and becoming so absorbed and watched the whole host of videos u have thus sidetracking their original purpose and thinking “ive wasted my time.” But thats no reason to downvote!
Having a real hard time getting a 50+ year old Craftsman radial arm saw working and so far everything is pointing to the motor clutch and/or capacitor. Your video is absolutely awesome and answers all the questions I've got [and haven't been able to find], and your props are outstanding!! Spot on and thank you for creating and posting this!
I have to echo the comments about pace, vocabulary, and CLARITY - you're excellent! (I rarely comment either!)
My dad did home repairs on car generators. When he replaced the brushes he checked the comutator?? Spelling?? (What the brushes make contact with) for wear. If the brushes had worn grooves in the copper, attached an electric drill to the other end of the shaft and resurfaced the comutator with fine sand paper on a flat surface, strip of metal or similar while rotating the shaft with the drill.
Can also use a piece of sidewalk chalk in a pinch (not as aggressive as sand paper), just be sure to clean it well afterwards.
Couldn't be more clear. Outstanding. Gifted speaker accompanied by very useful video.
“This is the kind of stuff that makes me want to cut motors open …” 😂 That curiosity is what makes you an excellent teacher!! 😀🏆
Thank you. You really do a good service for people. Helping them help themselves and save money.
I wish you were teaching my children in school. Great information.....great delivery. Thank you
Just saved me two hundred bucks!!! turned out to be a $15 capacitor.. Thanks love your videos...
Thanks for a most informative and beautifully done presentation (as always), Jeremy. BTW, If one is dealing with an archaic, discontinued model brush motor, and cannot find an exact replacement carbon brush, DIY by obtaining a dimensionally larger brush, and mill it down to the needed size using abrasive paper or manicure file.
Ill add to the choir. I'm a near 60 yo woman who steered well clear of electrical, mechanical, computer repair for years. In the last 1/2 decade i cant seem to get enough. I actually love learning and doing my own repairs. Its super gratifying. Sure helps understanding some fundamentals beforehand and theyre hard to find, whether poor instruction or poor visuals. Youve knocked both out of the park. Ill be back for more lessons as Im doing my part to keep my landfill contribution low while having a second run at learning new things. Bravo.
One thing I've done in an emergency situation on a sealed end cap bearing that's beginning to get noisy and slow it down is to drill a 1/8" hole in the plug cap, then add some electric motor oil 5-6 drops, then, clean cap surface around the hole and cut a small piece of aluminum tape to cover the hole. IT was on an outside air conditioning condenser unit.That was 2 yrs ago and it's still going!
OMG! Why couldn't I have had such brilliant teachers as a child. You would have shifted my life's trajectory.
I've been taking motors apart since I was old enough to pick up a screwdriver. I share your fascination with them! I remember being 3 years old and wondering how the second hand moved on my dad's electric clock without anyone touching it. my parent's explanation "Electricity makes it move" wasn't good enough for me lol
Super clear, knowledgeable, and easy to understand. All I can say is..WOW..Great vid!
Regarding the bearings: the "z" following the number (6042z or whatever) often refers to the bearing being sealed on at least one side. Some brands have different designation for a double sealed bearing, specifically by adding another "z" (6042zz). When searching for a replacement, ensure that your replacement is sealed on both sides( or only one side if that's what you need). I learned this the hard way when replacing the bearing on my kitchen aid mixer. Bearing was double sealed and had 6042z on it, I bought a different brand bearing with the same number. The bearing was an exact fit, but only sealed on one side. I had to get a 6042zz (not the actual bearing number, I can't recall the exact number).
I admire this gentleman..very clear and excellent at explaining the workings of the motor, what I admire most of all is the fact he shows not a shed of arrogance or ego..which I found on many a UA-cam video..that’s when I stop the video and move on..we are always learning and what you don’t know someone else does..so no one knows it all (yes I’m stating the obvious) stay humble folks and let’s just help and teach each other.
Your videos are always straight ahead and without blinky shenanigans. Very appreciated! Thank you!
I spent all patience looking for other info, but this vid so good I watched every sec of first half... Bout to do 2nd later. Ty much
Dear Jeremy, thank you for coming to my rescue with regard to a problem with our dust extractor motor. After a goof run {blast gate closed on both arms whilst motor ran for five minutes} the motor only hums on startup. Although the motor got a bit warm, I can’t believe that anything melted because the ambient temperature was so low - around 12˚C. The best bet is that the capacitor has failed. Let’s see if that is correct.
I have watched several of your UA-cams and have always been impressed with your presentation. It is clear that your knowledge is supreme but you do not come across as an arrogant know-it-all but a gentle and peaceful teacher. I don’t know what you do for a career but if you have ever thought of teaching, there are thousands of kids out there that would thrive on your approach. All the best.
Saved me over $300 on a sump pump in the first minute. Thank you!
This is great. I've had a few problems with Baldor motors failing (coffee roasting equipment.) I am quite positive that the capacitor ends up being the problem with at least 2 of them. If I swap them out (I'm not very familiar with motors, obviously, but I am competent with electronic soldering) and they work as normal, then you've saved me a few hundred bucks. So of course I'm now a subscriber.
The clearest demonstration of understanding motor problems I ever seen in layman's terms.😊
Good times, Jeremy is back.
Very nice that you were willing to hack the motors up for our viewing pleasure.
Its for my pleasure as well😆
Boots , I was thinking the same- he went to a lot of trouble to help us see clearly.
It’s not easy to cut a motor up to reveal how it works.
Best video ever, not over complicated easy to understand thank you
Our well pump has failed several times due to power surges and/or lightning. There is a control box at the well head and the pump is 600 feet below. In each case the start capacitor has blown along with the relay that switches from the start to the run capacitor once the pump is running. This motor is served by 3 wires, one of them sending current to the start winding. Once the motor is running the start winding actually generates a current which tells the relay to change to the run capacitor. After replacing the control boxes at about $500 each, including labor, I figured out how to replace individual components within the control box for about $50 and my labor. Better yet, I found that by installing surge protectors on both sides of the circuit (on the power supply side as well as the demand side which required a 3 phase protector) I can stop surges from both the power supply side as well as from lightning back feeding from the pump 600 feet below. We haven't has a control box failure since I installed the surge protectors.
600 feet? My well is a couple hundred feet deep but the pump is only about 20 feet down hole. The water level comes within 6 feet of the surface.
@OK Boomer The actual well depth is 620 feet. I live in the USA, mountains of NC at an altitude of 3700 feet. Deep wells are common here.
@@pyromedichd1 and l tough 220 feet was very deep 😓😓😓
Who would thumbs down this... That's ridiculous.. Thank you sir. im subscribing very professional and informative.👍
Never thought I could learn so much from 14 minutes. You've earned a subscription 👏
Thanks Jeremy, this video demistified the repair I'm doing on a 40 year old tablesaw motor. The demonstrations lined up with my initial observations of my motor in such a way that I was able to order the correct replacement parts with confidence!
Thanks!
very informative indeed..One tip from me is to collect all types of motor brushes as they are easily sanded to size and soldered to fit different apps..Thanks For your efforts Jeremy
I'm a kind of DIY guy, and professionally, I'm a Chem Engineer w42 yrs working, and still learning...
Please receive my admiration for all your knowledge, dedication and the inspiration you give us. Liked, Suscribed and 'Belled'. THANKS A LOT!
Jeremy I really appreciate your videos, you are a gentlemen for providing this info on motor technology. 👌🏻
I just inherited a delta 50 850 dust collector that doesn't start. I replaced the cap (thought there was only one doh!) so now I have to replace the run cap, will share after. I'm so glad you are such a good resource for motors and clever stuff. Thanks
You're the best Jeremy! I've learned so much from you, you explain things so well and easy to understand.
What a great video! Thank you for making it.
Only problem I have had with a small electric motor that you didn't mention was a starter motor on an old truck (6 volt DC): a small piece of metal got lodged between the rotor and the field windings and the motor would not spin at all until that was removed. While it was apart I put the rotor in my drill press and used emory cloth to clean the commutator bars as they were filthy.
"Hit the subscribe button if I've earned it".... You always earn it. I always learn something new from every video.
Ditto. If I could subscribe a hundred times, I would.
Earned my Patreon also
Seriously dude, how did you get to be so "cool"? To keep it simple, me smart too. I'm a "know it all". There is very little the average Joe could school me on. But your a very well composed individual. I admire your dedication to staying on topic, but allowing your opinions be heard. I'm sure it is well practice and comes with experience. None the less I for one am filled with joy to see a presumably happy individual do a craft all the while enjoying themselves. In my opinion one of many fundamentals of teaching I presume. My comment is well crafted, yes. But only because I have plenty of time to correct any errors, but you my friend are gifted with a ability to staying intelligent and humble in equilibrium. Thus creating little detectible error AKA a wise man. Opposing forces in balance. Good man. Even better role model. Speaking from the heart when I say, "God bless you".
Teach on teacher!
@@MichaelSmith-sn8mr - *'you're' - average Joe
@@MichaelSmith-sn8mr - *detectable
Natural teaching talent
Hi Jeremy, Just fixed my 2hp 120V spa pump that was just buzzing like when the capacitor was disconnected in your video. Capacitor was fine, it was the contacts on the centrifugal switch that weren't making contact when the motor was stopped like they're supposed to. A little bit of *gentle* sanding with a very fine grit sandpaper has fixed it for now. Hope this helps somebody if the capacitor-swap fix doesn't work. Saved me ~$250 for a new motor!
better to use a pencil eraser
Basically agree. My experience is about an equal number of faulty capacitors and dirty centrifugal switch contact, often a piece of sawdust preventing closure
Hi Jeremy. Great videos. Thank you! Could you touch upon these Fasco D132 3.3-Inch General Purpose Motors, 1/20 HP, 115 Volts, evap motors. I've had 3 of these quit on me after 2months of running. The first one came with the evap unit and lasted the longest at 3yrs. The 2nd I found on Amazon, and lasted 10mo's. , The third was a FASCO, and it ony lasted 2 months! At $60-$70 a pop, I'd like to begin repairing instead of replacing.
Thanks Jeremy! This helped me out a lot. I am repairing the electric window motors on a 1988 Mercedes Benz 300e. You have helped me figured out what the problem is.
This is my new favorite UA-cam channel. Everything you do is awesome. And, I love how you explain things. Thank you!
This lecture was clear and concise without music so the lesson could be heard. Other "instructors" using UA-cam to to help the needful could benefit for this guy as a mentor. Thanks! JD
I had a problem with an old drill press motor overheating with little to no load on it. Ended up being the centrifical starting switch. It wouldn't disengage when the motor got up to speed. A few taps with a hammer and some WD-40 got everything working again. I didn't have to disassemble anything fortunately.
WD-40 before its carrier fluid fully evaporates ignites with a spark like any volatile fuel.
THANKS! You are an awesome teacher. Wanted to tell you about a little trick I use when bearings, (mostly the copper sleeve types), are worn and getting sloppy, and its not convenient at the time to replace:
I look for super thin strips of brass or copper, (I've used everything from silver scraps to steel spring out of a tape measure), that I oil up and slide between the shaft and bearing; (sometimes a tiny sliver will do it), and it helps get tolerances back where they need to be.
Keep it oiled and it'll last long enough to finish that project . . .
I'm doing the same with a small cut from a plastic bottle to get through the remaining of the hot season with the same old fan.
The capacitor failure is a common cause of loss of air conditioning. You can fix it before the HVAC guy could even get to your house. It sounds just like Jeremy demonstrated (outside unit)
technosaurus - Had exactly that happen in a Florida summer years back. Pointed my oldest child to Google to research the part. I helped pull the motor & capacitor (that is a BIG cap). Had her rewire it, we mounted it back, and away we went. Good times.
Yeah, it’s bad when you pay $100 to have a repair guy come the next day and you realize you can do it with a 10 in 1 screwdriver and a $15 part
I wish I had seen this video and comment about three months ago. I had the same issue and it took the HVAC guys multiple visits to find the problem.
Home Depot and Lowes stopped carrying them, got mine from amazon cheap but took 3 days to receive. I recommend anyone with a house over ten years old (since last cap replacement) to consider stocking one for when it does fail so you don't have to wait and listen to your family complain. Once I had the part it took 2 minutes to replace.
@@asterix2ksi damn right, was just thinking I had better go order one since finding one in stock will be impossible (especially during this Corona summer)
i miss when i work on motor shops for 40 years fix all kind motors and rewinding them + converting them for a different torque , voltage, frequency and speed , good job on you video,keep work on this babies ,i love MOTORS
Hey Jeremy. I just wanted to say hi and thank you. This is a great channel I've learned a lot from it and I've watched a bunch of the videos a couple of times. As a result of your videos I figured out that it was the capacitor on the pool pump that was the problem and I replaced it and it worked fine. Plus it was really easy to do. So thanks again. I really enjoy everything about these videos from the information to your calm demeanor and personality and big smile and involving your kids too just wonderful.
I find myself looking for reasons to build random things after watching this guy. AWESOME!!!
You really have an excellent way of explaining things
Keep it up dude
You’re doing a good job
Jeremy, thanks for the easy explanation of motors and its components.
Nice to see a new video from you
I've long had a high level understanding of almost all of these components but I had a need to repair and your illustrative lesson helped me get it solidly and fix my motor. Thank you.
Awesome video!! I learned so much from you and I definitely know where to start (pun intended) now in troubleshooting and fixing the dead motor for my Sears Craftsman table saw. I also love how you leverage your skills and curiosity to appreciate and demonstrate the details of some fundamental engineering. I’m definitely subscribing and giving you the thumbs up so hopefully you can make more of these value-added videos!! Thanks so much!!
Thank you for your great videos. I have a 8 inch wen bench grinder that won't start the capacitor is good and the switch is good . I don't know about the the reostat for speed but this thing has a a bunch of electronic stuff I don't understand . Can I by pass that a will it work like a regular electric moter? Thank you
This man has the most Detailed on any motor that you could think of he is a human brain at this I’m glad I found him on the Internet again thanks bro thanks
Natural born teacher! 190K subscribers says a lot.
You are doing a great job, thanks. Recently had a 1/2 hp induction motor given to me which wasn't working. Hummed and didn't spin when power was turned on, but would when assisted. Uncovered the start cap and it was leaking electrolyte. Out a new one in and still didn't start. Accessed start winding centrifugal switch. It looked fine and wasn't welded closed. Filed points and lubed pivot points and put back together and its now running. Now I have a free $100 motor.
Always great videos
Been seeing your videos when they pop up in my feed. Watched a bunch. The fact that you say "if I earned it" at the end is the most humble way of getting subscribers I have ever seen. And It's why I just FINALLY subscribed.
🙏 Thank you for sharing your time with us!! Question: Is there a way to make a foot control (like a sewing machine has) to control the speed of a Dremel 295 variable speed rotary tool? I'm a self taught bench jeweler and I need both hands when I'm working on silver or stone setting. I like to repurpose, recycle, repair and sometimes make my own tools. Thanks again for your work!!!
Build a small U shape piece out of boards. Get a dimmer switch, pull the knob off, attach it to one of the side boards. Run a dowel as a shaft from the dimmer switch's control to the opposite board where you put a bushing of some kind (can be just an old piece of plastic with a hole in it, like a piece of cutting board, shim made of milk jug, an empty tape roll or slice of a pen body since it's just to keep the motion smooth and supported). Attach a pedal to the shaft slightly off-center, like a treadle.
This will reduce the power of the dremel at the lower speeds as well, but I think the inbuilt speed control for them may already do that. Also it's important that the dimmer switch's range is sufficiently small to fit the range of the pedal, and that you orient it so that "low" is in the position you prefer - pedal fully engaged or foot fully relaxed - else you may have a struggle.
As an alternative, you can do it with a sliding dimmer switch. Put the pedal onto a hinge and add a return spring. Optionally a strap over the pedal so you can lift up with your foot too instead of just relying on the spring. (tip from the bike world used in coaster brakes and fixed gear bikes...)
Your teaching an 83 yr old woman now! Oster juicer 8138. Hums but won't turn over. This motor is very much smaller than what you covered. I can't recognize the different parts on this small size. I will look at your other links. They might help me. Thanks so much. You are so clear in your instructions.
just remember to discharge that capacitor else you'll have an "electro-boom" moment
My thought exactly, he could use a quick warning edited in there
@@eriknau1 Exactly.. Surprised at the lack of warning given it is AC voltages.
Instead of saying it you should explain how to do it. It would help people know what you are talking about to avoid this Boom?
Electroboom is a electronic channel that has a running joke where he's always electrocuting himself. The motor starter capacitor can give you bit of a shock if you touch it after running. (first hand experience)
@@pixifixi2076 my brother pulled the capacitor out of one of those electric fly swatters. He loved charging it up, then tossing it to his friends to catch.
Thanks Jeremy. I have a Sears air compressor motor which gave me trouble. It blew a couple starting caps because dust and spray paint made the centrifugal starting weights stick on the shaft. I opened the motor, chipped the dust/paint off the moving surfaces and reassembled it. It has been working good for a number of years now. JwgK
You should be teaching at a trade school or Jr. College.
You are a cool guy. I just introduced my son to your videos. IMHO these archives will propel our future, thanks for keeping it real.
Awesome Video... I was once given a chop saw and told I could keep it, even if I fixed it. After taking it apart I found that one of the carbon brushes wasn't making contact with the commutator. I took the carbon brush out and I found that a bit of weld spatter down the channel which seats the carbon brush. Used hammer and screwdriver to knock it off and boom... still going strong today!
Years ago our furnace blower motor had a bad bushing. Rather than bearings in the shaft there were bronze bushings. My dad fixed it with what he had, a short length of copper pipe. He cut it to length and cut it lengthwise so when tapped into place it confirmed to the right diameter. The fix lasted for many years, till the whole furnace was replaced.
I appreciate the excellent content.
Thanks
Thank you, Thank you, Thank you, for answering all the important questions you could possibly have, and sparing us from the redundant "opening the box" parts like most of these. This puts you at #1 in my book. You da man!
About to have to mail my motor 2000 miles for a rewind now I believe I’ll replace the bearings first it does just what you
Explained shutters when under a load and got worse