pittsburgh cat man said: Scroll chucks the jaws have to go in in proper order is there any numbers on jaws?? Click to expand... Yes they are all numbered
Ancient lathe chuck adjustment
Started by materthegreater63 replies
materthegreaterSuper User#41 Willie BSenior Member#42 DDoug said: .005 is not much. suggest you dis-assemble it fully, clean very well, and take a flat file to every flat surface to get rid of any dings & humps. And then hard turn the jaws in place. Which....will only get it true in that one dia. setting. Or get a 4-jaw and learn how to dial them in. Click to expand... Four jaw is nice, but slow work. Dialing it in takes time.
DDougSuper User#43 Willie B said: Four jaw is nice, but slow work. Dialing it in takes time. Click to expand... I can do it plenty fast. What's your hurry when doing repair work ? It's really not that hard with a little practice. Dialing something in to .001 with a 4 jaw is much easier than fiddle farting around with a 3 jaw, some shims, some voodoo.
Welder DaveExpert#44 I'd put a nice straight shaft in the chuck and check run out with the jaws tightened. I know it's common to tighten a chuck in more than 1 location on the outside. That alone might be able to eliminate the .005" difference.
Truck ShopSuper User#45 Imagine this old school 4 gang bore bar-on set up. I read there were always a few headed back to smelter. *
Welder DaveExpert#46 That older guy looks like he knows what he's doing! Just like the specialist who did two vertebroplasty procedures to repair my back. He was younger but gave you confidence he knew what he was doing. Actually it's kind of the same when picking up parts. You want the person that knows how to look it up in a paper catalogue.
mekanikSenior Member#47 More pictures of the lathe? It would probably be a good idea to disassemble that chuck and give it a good cleaning.
materthegreaterSuper User#48 mekanik said: More pictures of the lathe? It would probably be a good idea to disassemble that chuck and give it a good cleaning. Click to expand... Kept forgetting to take pictures. I'm sure the whole lathe should be cleaned also. If only I had more time to work on my tools... The gear circled is the one that doesn't stay engaged with the changeable gear. It's on a pivot and there doesn't appear to be any way to latch it in place. I've been using a bungee cord but that only works so well.
mekanikSenior Member#49 Great old lathe!! That gear that keeps coming out of engagement has to be adjusted to get the proper gear lash between the gear that drives it and the gear it drives. I suspect there are bolts behind that gear that need to be tightened once the lash is set. It looks like the gears could use a good cleaning and lubing. Chainsaw chain oil works really good on open lathe gears.
materthegreaterSuper User#50 mekanik said: Great old lathe!! That gear that keeps coming out of engagement has to be adjusted to get the proper gear lash between the gear that drives it and the gear it drives. I suspect there are bolts behind that gear that need to be tightened once the lash is set. It looks like the gears could use a good cleaning and lubing. Chainsaw chain oil works really good on open lathe gears. Click to expand... There is a small set screw that increases the friction on the pivot (it pivots on the same axis that the gear above it turns on). There are no other bolts or anything else I can find to lock it in place once set.
mekanikSenior Member#51 What is this square headed screw for? Does it lock the idler gear shaft once the lash is set?
materthegreaterSuper User#52 mekanik said: What is this square headed screw for? Does it lock the idler gear shaft once the lash is set? Click to expand... You, sir, are a genius and I am an idiot! That screw looks identical to the tailstock alignment screws, so I assumed that it somehow adjusted the headstock. But I just tried it and it does indeed lock the idler gear. Thank you!
mekanikSenior Member#53 That lathe will last forever if properly lubricated. Every moving part should be dripping oil. There are probably felt wicks in a lot of locations to hold oil which are probably worn out so frequent oiling is needed.
kshansenSenior Member#54 mekanik said: What is this square headed screw for? Does it lock the idler gear shaft once the lash is set? Click to expand... Gee! I thought I had an old lathe! At least mine is so new it has guard over the gears!
materthegreaterSuper User#55 kshansen said: View attachment 358662 Gee! I thought I had an old lathe! At least mine is so new it has guard over the gears! Click to expand... I just removed the guard for pictures.
Willie BSenior Member#56 kshansen said: View attachment 358662 Gee! I thought I had an old lathe! At least mine is so new it has guard over the gears! Click to expand... Mine is 122 years old.
materthegreaterSuper User#57 Willie B said: Mine is 122 years old. Click to expand... Mine is a spring chicken at 108.
mekanikSenior Member#58 Can you imagine some of the things that were made with those lathes in that time!
materthegreaterSuper User#59 mekanik said: Can you imagine some of the things that were made with those lathes in that time! Click to expand... WWI
Willie BSenior Member#60 mekanik said: Can you imagine some of the things that were made with those lathes in that time! Click to expand... Cliff Dawson might be the most intelligent man I have ever known said the lathe is the only machine able to reproduce its clone.