Jackshafting Part 5: Tub Grinder Jackshaft Refurbishment
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- Опубліковано 29 вер 2024
- Jackshafting Part 5; Is not a video about Lathes, Mills, Drill Presses, welders, welding, Machining or PlasmaCAM or plasma cutting, in fact no fabrication or manufacturing is planned unless it is for the need of tooling! It's about the mechanical break down and refurbishing a Jackshaft assembly. A jackshaft, also called a countershaft, is a common mechanical design component used to transfer or synchronize rotational force in a machine. A jackshaft is often just a short stub with supporting bearings on the ends and two pulleys, gears, or cranks attached to it.
Keith I really enjoy your Videos, thanks for taking the time to record them and share your experience
LOL, thanks for the comment! I had just made a trip out to see my dad last month and San Diego county, still smelt the same, a few extra lanes and a couple new HWY's and traffic is still the same. It was a great place to grow up at the time period which I did. Its got to look worst before it gets to looking better! A part of me misses you all too! I did get to go down to Virginia Beach and work on the sub base for a week, a couple years back, helps some old friends from SD. ;{)-----
I see why you put so much emphasis into every detail of this job. This shaft goes into a beast!
Hi Keith. At 73 years of age and all the way from New Zealand I just love your presentations.
Wish I had had a "Teacher" like you when I was young. As it is, I turned out to be a sort of a handyman thinking I am quite clever in the work~shop until an expert turns up. However living in a fairly isolated location my "efforts" often got things going when required, but I do envy in a nice way your skills and the way you present them. Congratulations on a job well done . Cheers Charlie
This series has been a nice change of pace for your videos, thanks for sharing your knowledge and the work you do. It'd be great to see the machine in action. Do you get to see much of your work in action, and if not, does that bother you at all? For me I have a hard time not seeing something I've done, doing what it's supposed to do.
Thanks for the feed with your comment, Jarrett ;{)-----
So what was the shaft made of? 90 series?
Chris - search 'metal wedges' at mcmaster.com
I finished editing part 5 & 6 this morning and thought I'd publish them for you all waiting for the next in the series. I will be working on 7 & 8 as soon as I can! Also waiting on the word for a trip down and see the machine in action. Back to the shop! ;{)-----
Thanks for the comment and its not the first time I've referred to, pushing my file as draw filing, even though I know the difference, I get going and it slips out. I will try to change my phrasing to; applying, pushing, rubbing or caressing the file to the project. ;{)-----
Cool thanks for sharing your experience, in the yards on a lot of the larger fasteners and such the same kinds of special fixtures were use to set the tensions. ;{)-----
The pulleys were the main reason for the tear down, they were worn beyond manufactures spec's and advised to change out. ;{)-----
I don't know what the original design called out for, never got any of that info.
;{)----
Good point, they may have a maintenance set up for that already. ;{)-----
I knew my limits, and now learning my new limits,LOL, I pull a rib again on this job, and didn't make me go to the chiropractor, until I was reaching in the refrigerator for a water, two days later, almost sent me to my knees, That's why I built my lifting tools and the old I get the more I'll pass on and or make new tools for lifting! ;{)-----
I recognize that Keith. Sometimes it's the tiniest movement that brings it on
The notifier I have set on my 4G ;{)------
Keith nice work, and attention to details. Looks like there are many ones on this job, cleanliness, high spots, location of set screws, and knowing the dimensions that insure the couplings are fully locked on the tapers.
On this job it looks like the size of the work prohibited you from working on one of your tables. If you could would you have done this work on a table or pipe supports? I know it sucks to work on the floor sometimes.
On taper to taper metal contacts, where your looking for locking action of the tapers, is what my reference is too! I have and sometimes also use never seize or grease on straight bore fits with metal to metal contact. Thanks for the question! ;{)-----
Great job as always Kieth. Looking forward to the finished job.Good advice on the hydrolocking issue.
Googacct, the whistle sound was most likely his cell phone ring tone. I've heard it before too.
Keith I love your videos. As a kid I worked as a manual turret lathe and punch press grinder. Fun to see and appreciate the craftsmanship. Keep up the good work.
Thanks for the comment! ;{)-----
Sorry I missed your message at the time you wrote it, Bill is right, I ether got them through MC Master Carr or MSC. Wedges is the key word, they have several lengths as well. ;{)-----
Seemed a long wait after part 4! Had a feeling you'd been away and thanks for continuing this fascinating series. One question - when and if you have time - where can I get the machinist wedges you use? I never had those as such and wonder if I can acquire one or two somewhere, despite fact that my machining days are few now I am an old guy. Keep up the great work and thank you.
Thanks! ;{)-----
Cool! ;{)-----
The taper itself doesn't get wet, the coolant path is through the pull stud or through an inducer below the taper.
Great to see the newest episode I look forward to them for the education and entertainment
metal on metal contact
is almost as nice as....
skin on skin contact
Nice to see you back making vids
Best wishes to your Dad
Dear Keith, so good to see the care you take gettingshaft together, I enjoyed your comment to keep it nice on the comments too. I was turned on to Never Seize back in removing the transmission from a Mack R 600,previous installer had not used......we did on the installation, I am a firm believer in using the stuff [especially marine aluminum to steel] for the next guy and maybe me if I have to work again on the part. Keep up the fantastic work, we love you, even my wife has started to dig, PRB
What is the idea of fabricate cast iron tapered bushings and what pros&cons would have versus a high tensile steel bushing. Could cast iron bushings be re-installed on a rebuild procedure for instance ? Great vids, always very instructives.
There are lot's of variations... "If what you're about to say is not nicer than silence, remain silent" but I like too "It's better to remain silent and be thought a fool than to speak and remove all doubt"
How do CNC machines with thru-spindle coolant manage to get the full performance of their spindle tapers? I would think the thru-spindle coolant eventually will coat it like you say?
At work we use something similar to seat our bearings (not on a taper lock, just to make sure the stack up is completely seated). It's actually a hydraulic cylinder in the form of a nut. Thread it onto the shaft, hook up the pump. 8000 PSI later, the entire stack is completely seated. Then just slap the nut on with some Loctite, and that bearing is good to go.
Also, we use Molykote on our shrink disk taper locking surfaces.
keith we recently changed a bearing at work to a cedar rapids rock crusher. On the taper lock surfaces the maker recommended dry graphite ! 1st time I heard of it ...also we use a hammer nut wrench to set the lock ....not the retaining nut....its hamered till it wont turn nomore...then the retaining nut put in place (the nut wrench is the same thread as the reatainer just alot heavier with 3 lugs welded on , which gets struck with a maul) the bearing weight 160 lbs and was 4000 $ Canadian LOL
Hey Keith, nice project again!
But I have a question... at about 05:00 you say that you don't want any neverseize or something in the metal to metal-contact. But why? I often mount ball bearings in corrosive environments putting neverseize on the shaft and the housing (not IN the bearing), may this cause trouble?
Greetings from Austria
Love this series, it really drives home how important it is to know your materials, how temperatures affect them, and how all that and size affects fit, torque, etc. In regards to machine operation I suppose just one example where this knowledge is really useful or even absolutely critical is when you are using a tapered mandrel to hold a workpiece in a lathe.
Hi Keith. The divots that you were massaging out, would you not check that with crack check or is it just metal pulled up by they tight tolerances between the flange coupler and the shaft. I guess I would be concerned about torsional cracks caused by the stress riser marking created by these parts. I'm I just being to picky?
There is a specific tool made just for cleaning cat-40/50 tapers. If you were referring to the inlet there is a seal. Although on cat tapers or nmtb or what have you, the taper is too obtuse to provide much"locking", like a Jacobs taper would.. The angle is there for positional accuracy, and the retention knob or draw bolt locks it in place.
Well it would sure be a good day if you came back, I have lost all faith in the machine shop on base, its a sad day when we cant trust the work out here.... take care, man.. if I hit port near you expect a call and a fresh cup of coffee at your door some morning .
Keith - You keep me awake !. What I mean is that I sit and watch video after video until I can't keep my eyelids open. You really do a great job presenting what you're doing, well narrated and a joy to watch! Keep up the great work!
Stolen and modified, Hope you don't mind !
This is why I Love this channel! I don't just learn from the videos, but from the comments as well!
BTW Keith - That was the best footage of de-burring I've seen anywhere! Especially the remnant line showing the need for a little more work! Thanks for using such good camera techniques!
Sorry to say but when you use the flat file as you do, that is not draw filing. You must use both hands, one on each end of the file and pull the file perpendicular to the surface. You are an insipiration to all machinists and hobbiest's alike, THANKS
Keith - You put me to sleep. What I mean is that I sit and watch video after video until I can't keep my eyelids open. You really do a great job presenting what you're doing, well narrated and generally a joy to watch! Keep up the great work!
At 17:04 you whistle some short tune. I have heard that whistle numerous places, but have yet to figure out what it is. Is it part of some song?
Hey Keith I find when I want to align holes I take the old bolt cut the head off, taper it slightly and cut a slot for a screw driver for easy removal, needless to say I have a ton of guide studs in my box LOL. PS great video!
Thank you for the comment Charlie! ;{)-----
Is the end result any different? Just curious. Perpendicular to the surface?
'If you got nothing nice to say dont say anything at all'... my mum says that too... im that old either ;) loving your work as always Keith.
Keith another great series your attention to details is awesome and I always learn a lot. I support a manafacturing floor in New 3
PLEASE COME BACK TO SAN DIEGO , this ship yard is destroying my Submarine.
THANK YOU FOR YOUR VIDEOS
Im learning a lot,
"Even fools are thought wise if they keep silent" Proverbs 17:28
Why were the pulleys changed? I assume the bearings were worn.
Living in New England, never seez is a must my man. All threads all the time. At least that's how it goes in my shop.
Thanks! ;{)-----
looking forward for you to getting back to the normal program...machining! :)
excellent series
Thanks a lot, Keith. Great work as always, nice to see new uploads from you! :)
What would you estimate the total weight of the assembled shaft to be?
It's a tune a phone makes to let you know you have a message
Thanks Keith! That's a lot of work... both head and hand...
nice job Keith, how is your father, is he come out form ICU
Another great series Keith.
Was this a bid job or a standard time/materials?
As a business owner/sole proprietor myself I am always curious how others with specialized skills cost out their projects with clients.
Thanks for the comment, just time and materials ;{)------
Thanks for that.
Love the videos and thank you for offering us a glimpse into your master craftsmanship.
Well put, Well Done. Thank you much.
Quel courage de travailler à terre !!!!
Georges
whooo hooo...been waiting for these, thanks kieth
Bill - bless you sir - much appreciate the info.
Keith, is there anyway you could have the shaft up on a couple of saw horses with the shaft sitting on two saddles to help save your knees from working on the floor?
No, I think it covered your comment :)
Sometime I put a piece if threaded bar in one of the holes loosely to guide it on and align the bolts....
yep , it is !
Keith 8
Long angle lathe file ?
Hey Keith what about a dry lube on the tapers would that cause problems?
I stick with nothing applied, because that works for me. ;{)------
it is necessary to say "alright" constantly