Lathe Compound (Top Slide) Tricks!
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- Опубліковано 27 сер 2021
- This episode on Blondihacks, I show a few neat things you can do with the compound on your lathe! Exclusive videos, drawings, models & plans available on Patreon!
/ quinndunki
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My kids love YOU. You remind them of Aunt Jen. She teaches Math in the NAVY. Smart Women Rule.
Extremely rare too! And fold when challenged outside of their safe space.
Just came across your videos. You are an excellent instructor! I have been self teaching as a hobbiest for a long time, and you have cleared up several "murky" areas in far shorter time than anyone else. Thank you!
I did my apprenticeship in 1968, this morning lying in bed, tea cup beside me, watching and listening to you, I learned several set up’s I haven’t known for decades. You have a great way of teaching. Thank you.
For a budding machine guy this is the gold I have long sought.
That was really well put. I’ll second that
It's like finding your own master to be an apprentice to.
Sometimes you'll speak of being able to "intuit" something. As a newbie, my intuition is often wrong, even 180° wrong.
Watching you work, hearing the explainations, absorbing your reasoning is developing my intuition. Am beginning to 'see' the next step, or visualize a process, even before ever doing it myself.
I know that watching isn't doing, but watching is learning (and often laughing; you've a great sense of humor. Utterly lacking in other videos & much appreciated), and so I wanted to tell you that you are building in us new folk that sense of intuition which appears a valuable tool to have in this lathe quagmire.
Thank you so very much.
Congratulations on being able to anticipate what she may do next. That is an excellent test to show how much you are learning.
If you put a point on your drill adapter shaft, you can insert it into the center in the end of the compound leadscrew, and it will keep it centered while you feed.
I use a socket and just turn the nut that holds the dial, also always centered that way
You teach really cool things without pretentiousness and your personality shines through in wonderful ways. Thanks for bringing such fun to the learning process.
Great breakdown of techniques!
My preference is the compound in the bottom drawer of my tool cabinet ;)
🤣😂🤣
I'm planning to do the same with mine, but won't throw it away, is has its place on the carriage, just not permanently.
Yes my on my crappy lathe the compound is an optional extra. The tool post mounts directly on the cross slide and gets replaced by the compound which has its own fixed tool holder.
Donnez nous une meilleure façon de faire sur tour de mauvaise qualité!
I’ll be rewatching this one for sure! Thanks Quinn!
WOW!! Your 14 degree tip has just just given my reliable 1970,s Clausing Lathe, Micro Adjustment Supper Powers!!!...thanks Quinn....Love your channel!!!
Thank Quinn! As always, you explain these technical subjects so that a hard headed amateur can understand.
I use a plastic disk with 4 or 6 holes and bolt with nut in the middle of plastic disk + electric screwdriver for fast compound movements. It has much better centering and less vibration than T-shaped adapter. Also it can be used on cross slide. Also it does not damage lathe handles, because the disk was made of plastic.
Thank you for your incredibly informative video. You always explain concepts clearly and you never take for granted that your viewers will already have an important piece of background knowledge.
Awesome video - I'm definitely adding this to the reference material for when I run lathe classes at our hackspace!
Bravo, I look forward to hearing you weekly. You explain everything so well with clarity. The tone and Cadence of your voice are perfect. Keep up the good work and as always I'm looking forward to next week's lesson.
That 14 degree trick is pure gold. Will definitely be using that going forward. Thank you.
Your knowledge sets the lightbulb off in my mind.
You easily encourage my passion for metalworking. I love every video you have presented -
You provided some great tips to some previous problems I never considered the cross slide would have solved. Thank you.
Again, another great video Quinn. I've learnt something new to do with my mini lathe. Thanks.
Good info, well presented as usual.
Two more:
1. A variation on the scaling setup is to deal with the imperial-to-metric thingy with appropriate compound slide angles, and
2. Mounting your compound slide on your milling table in various orientations (think angle plates) and the part in the spindle can open possibilities.
Ooh, both great ideas!
@@Henning_S. I forbid you to use metric terms in such an imperial manner.
@@Henning_S. No way to avoid the calculations... Setting your compound to precisely 11degrees and 18minutes only introduces more calculations.. Don't get that right then 0.01mm per thou on the compound dial goes out the window.
@@Henning_S. Setting by eye is far from "precisely hitting a metric diameter for a bearing"...
12 micron...
Is 12 micron.
Eye, have a feeling eye could creep up on your metric diameter before you set your compound
Done
Very informative video Quinn!! Thank you so much for the tips!! Happy chip making!!
you are spot on with great presentation, love your work
Quinn,
I was only able to give you 1 thumbs up, but this video deserves a lot more.
Many of the items discussed, sure, I knew (been messing with lathes since the 50's), but there were a couple of new ones that I never thought of.
Thanks for the excellent presentation.
Your talent and knowledge are amazing, love your videos please keep them coming!
Thank you so much for all your videos on lathe and mill tricks, I have a cnc machining certification and an engineering degree. I was able to land a dream job as a model/tool maker and felt super underprepared for manual lathes/mills. These videos have made me feel much much better
As many lathe videos I've seen I never saw some of these tricks. Out of necessity I figured out about machining large diameter parts when I turned down my brake rotor. Good show.
Excellent episode Quinn. Thank-you.
Not sure if I've ever commented on your videos, but I do enjoy watching them, and I admire your talent!
Thank you for sharing the tip for increasing the resolution of the compound dial. My dad was a tool and die maker and he taught me that about 60 years ago. I use it a lot on my old Southbend lathe
I just leveled up by watching this. That was time very well spent!
Some neat tricks. Nice video. I like when people know what they're talking about.
I enjoyed the video and learnt something new as usual, thank you. Incidentally I use the trick of locking the carriage with the leadscrew nut as I don't have a lock on the carriage so the compound gets used for a lot of cuts. I also made a angle plate for 14.5 degrees so I could set the compound against the face of the chuck easily, squeezing up on the end of the compound that with the compound angle unlocked sets it up perfectly. It is just a case then of tightening the lock nuts.
4:20 thanks Quinn, I learned something this morning. I’ve always over cut, just like you said. Maybe now I can be better, like you !
Only just started watching the video, and already I know I'm going to find it useful as I often struggle with my top slide(Yes, UK person here). What a great feeling.
Cheers Quinn.
Ha, we always called it a top slide, as well, even being solidly Midwestern 'Mericans.
Cheers!
on the last part with the compound: using it in this fashion also greatly expands the reach of the tooling when doing over length parts in the steadyrest. you can get really creative with the setups there too...
I follow many youtube machinists, you are the only one I've seen covering this subject. Top marks young lady
I start work at a machine shop in a couple days. Say they are going to train me on the lathe. Not sure if its a cnc yet but have been binge watching your videos and have learned alot. Keep up the good work
This tutorial was BRILLIANT!!!!
Brilliant (as usual)! It is one thing to know how to do such things, but the clarity of your explanations is exceptional.
Agreed.
I will be sure to recommend this video to lathe newbies. I learned lathe operations at my technical HS but the 14º offset trick is new to me. Thanks! My tip: I use a Sharpie to mark the positions of my compound and cross slide at "0" so I don't have to count my handle turns when backing out. Also keep a small bottle of alcohol and a rag handy to erase the marks.
While not as experieced on lathes as on other machines, I did learn the compound was my friend. Rigidity was an issue on a South Bend that was older than me, but I did figure out the gib adjustment, and sometimes made a cut while pushing a finger on the tool holder. (Certainly not the best precision, but when criticality was low enough, and time was short, it worked).
That was a great and highly informative tour of the compound. Happily added to to my "likes". And particularly with the hints on the reach aspects. It's not just the small lathes that can run into such issues. And consider that even if one does make a solid riser it's not like the compound cannot be swapped in and out as the situation requires.
I ran into the same issue with the degree scale not being the full 360. My 12x36 size lathe angle markings only goes around to plus/minus 45 and originally came with only a single "0" hack mark. I added additional hack marks at plus and minus 45 and 90 to the cross slide top. And later on to allow swinging right around as you demonstrated I added more marks at 135 and 180 on the tail stock side. An initial light scratch mark followed by a light tappy-tap-tap with a small purpose ground cheap cold chisel and light hammer finished the very helpful job. At times the work can also be in the way of the proper zero mark too. So having the additional hack marks comes in handy in additional ways.
Always something new to learn thank you so much for sharing.
This channel is a treasure 🤩🤩🤩
Great video. Thanks for the tips and well earned experience on your part.
Awesome video, never thought of these tricks. They will help. Thanks
Fantastic video, I’ll be showing my students this one!
I like your bookmark trick. Also the angle gauge between compound and spindle.
I got a kick out of the piece of string and the nut/weight to hold down the bellows over the lathe bed....simple and effective.....
Post-video addition on the way cover project. 😬
Very informative Quinn. Thanks for sharing!
The compound on the lathe is a good layout tool too. The face relief angle on most right hand lathe tools is pretty shallow, so setting the compound on a 90 or 45 can give you a good sharp scribe line. Good for crappy castings too to see if the material will clean up.
Thank you Quin. Every video hurts my brain. Keep up the great work.
Excellent videos. The 14degree trick is definitely not common knowledge. Lathes are awesome 👏🏻
where did such a young person pick up this level of skill? one clue is the phrase "dead nuts" the last time i said that(15-18 yrs ago) i saw a blank stare... thank you Sooo much for keeping this skill alive. the compound is such an under-used asset,
Hi there blondie great lesson here! Your work is fascinating and your way to explain it makes it look so simple... you make me want to buy a lathe and try!!!!😜
Wow, I was a machinist in the army for five years and had to "eyeball" some depths of cuts numerous times, that compound trig set up just blew my mind!
⁸
This was a great video, enjoyable, informative, and a welcome distraction from what I *should* have been doing instead.
I don't think it will stick until after I get a usable lathe, and start trying to solve problems with it. On the plus side, I'll get to watch it again!
You are obviously more comfortable with the math (trig) than a lot of the machinists out there BUT you covered the uses and NEED for understanding the math behind what needs to be done. Super job, Quinn.
Joe Pie has disproved the myth that setting the compound at 29.5 degrees allows the single point tool to cut on the leading side only, his point is that it has to cut on both sides or you will not get a good finish on one side of the thread. Thoughts? He did a video on this subject which is quite convincing. This video of yours is VERY good........ thanks
I always learn something, do keep 'em coming!
I have exactly the same wimpy compound. I replaced the gib screws to a dimension higher and that made it more rigid. Also some extra hand scraping improved it.
"Relativity for compounds..."
- Blondie Hacks
That wins the internet today! Love your videos, very educational and fun at the same time. Keep up the good work, I've made some of your tutorial tools already, keep 'em coming 🙂
My dad taught me that setting the compound at 3 degrees will trig out to cut a tenth on the diameter for each thou taken on the compound. It is actually 2.866 degrees. I have a 1947 south bend bench lathe. I just use the emery cloth. All good tips, good job Quinn.
Great video! I like to run in reverse for angles and cut on the "backside". (Depending on your chuck mounting , RE: Sharpe toolroom lathe ) love your tip about compound elimination block for some applications!
So we all have one more friend than we thought. Great episode!
About using the compound device. Worked in a Airspace company. It was was used alot, for all kind of angles. Moving in to 14 degrees, that is a very nice feature 👍. This is handy to dial in .0005" to hit your target.
Compound is very useful! : D Cones, chamfers, threads, precise movement on both axes, also you can use compound when your cross slide, or Z-slide is not working (for example to fix it or to add thrust bearings there, etc.) etc. : D
Don't forget when copying an angle like the morse taper on the lathe centre you need the stylus of the dti to be on the centre height of the angle you are copying. You need to be clocking alo g the maximum diameter of the taper.
You're an excellent teacher.
Very nice 👍🏻 I totally think the coffee cup was especially nice ThankYou
One important thing you may have missed - When you are indicating on that dead center that is chucked in the lathe, you need to make sure it is running true, and especially be careful that the indicator tip is on center vertically (ie. at the lathe's spindle axis vertically). Otherwise your angle will be off. You can find that point by leaving the quick change dovetail (the one that is holding the indicator) a bit loose and sliding it up and down to find the highest point, keeping pressure back on the toolholder so there's no slop in the reading. Then, lock it in place there.
Great video production/discussion/demonstration
Really awesome Quinn thanks
another great tip for using the compound for tapers. Use a Boring Bar and turn in reverse on the far side of the part. I use this technique all the time for great taper finishes, and I can keep the boring bar at the same 90Deg angle to the workpiece instead of matching the taper angle. I always finish the diameter in reverse feed also, its just easier to keep it steady
Great tips, thanks Quinn. I like your t-slot fillers too.
Been rewatching a bunch of your lathe videos. You've referenced it a few times, but I'd love to see your take on a solid tool post.
If your lathe can run clockwise you can work on the backside of the part, if not you can still work from the back by turning the tool upside down.
Very nice video as usual. The angle block demo is sweet, and using the cross slide zeroing with the compound for feed is a really neat idea.
Not that this is recommended but you can also loosen the compound and swivel it during the cut to form shallow concave/convex hemispherical cuts, like a very limited ball turning tool. Stressful on the machine and somewhat risky for the user, much like a ball turning tool.
I love these videos. Need to fix my lathe so I can practice them
Thanks for the great tips! Cheers from Australia
You must be psychic...! I am in the process of building a sort of compound on my home made lathe, not really understanding the functional requirements... Now I know better and will rethink everything. Thanks for saving me (again)
When I was younger I worked for John Martz Luger carbine maker from Lincoln, California and I would make sling ring reproduction parts. The one that went into the buttstock had wood threads cut into them. If one looks at wood threads they start on the end at a point then, quickly follow a radius to the tapered shank. I created a jig which worked with the compound of my lathe so the threads would begin cutting at the tip of the sling ring shank and would follow the curve to the main taper of the shank and lastly pull the threading tool out of the work at the finish end of the thread. The threading tool was a standard 60° tool with an angular flat ground into the end of the tool. When all was working properly and I had to sharpen the tool often; it produced a beautiful wood thread that was part of the sling ring mount. After creating the thread, I would take the part out of the lathe and put it into a 5C Square collet block and machine the rest of the part in my Lagun milling machine with a form tool I made. I also had my own tool sharpening / grinding capabilities on a pedestal tool grinder and would put a microscope on the post and grind tools under the microscope. I made alot of form tools both lathe and milling cutters in HSS, M2 and carbide.
Thanks for the tips, enjoyed it.
Very good tutorial, like all the others of yours I have seen. 👍👍👍
The 14 degree compound is ancient lore. Some of the old Cincinnati tray top lathes had a detent at 14, 29.5, and 84 degrees (at 84 degrees .001 compound =.0001 cross)
!?
My whole world literally just changed. My skill bar just went from basic attack to lvl 80
thank you- the 14.5 degree part will help a lot with my very old large lineshaft lathe.
One mark on the cross slide and on the compound is .004
I love my compound too! I can't imagine using a metal lathe with out it!
Just found you. What a great programme, loved it - keep the tips coming. B from England
Brilliant trick. Thanks
Your knowledge is amazing....cool videos
Thanks for sharing, any workshop tips & trick are appreciated
Very informative! Thank you.
Some great tips! Thanks!
Never heard this before GREAT !! But I'm glad I have never had to worry about anything closer than + or - 1 thou in my garage !!
Learnt something here, thank you.
Great tips! Thank you!
Hello Quinn, very nice tricks you show I did not know it 👍😊 But I'm a milling man so many thanks for your tricks 👍👍😊
thanks miss from Australia. bloody genius.
you are an excellent teacher
This gave me flashbacks to SB's How To Run A Lathe, had to go dig it out and if you set your compound to 84 degrees, each .001 of compound travel translates to .0001 of cut. (Pg 42 in 55th ed.). Love your stuff!!!