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Beautiful old American Iron and Steel
- Thread starter Batmanacw
- Start date
I've learned a ton about this lathe so far. They had the clutch set pretty tight. I learned how to adjust it to factory spec. We will see if it needs further adjustment.
The 12" 3 jaw chuck has seen better days. It was full of crud and chips. Now it's lightly greased and moving well. The jaws are slightly sprung. I chucked up a turned piece and indicated it. A light tap in to true and a little extra snug up and it held straight within 0.003" on both ends. I'll take it......super pleased. Just straight chucking up was not a good look.
No reverse jaws for this chuck. I'd be happy with a 4 jaw once I know what size of chuck adapter to buy. Possibly 2 3/8" I read somewhere.
The 12" 3 jaw chuck has seen better days. It was full of crud and chips. Now it's lightly greased and moving well. The jaws are slightly sprung. I chucked up a turned piece and indicated it. A light tap in to true and a little extra snug up and it held straight within 0.003" on both ends. I'll take it......super pleased. Just straight chucking up was not a good look.
No reverse jaws for this chuck. I'd be happy with a 4 jaw once I know what size of chuck adapter to buy. Possibly 2 3/8" I read somewhere.
Last edited:
- Joined
- Jun 7, 2013
- Messages
- 10,087
I think you would be safe to back that chuck off under power, I have a 19" Regal Leblond not much newer than the CJ and do it routinely.
I measured the damaged spindle nose this morning. The nose is 0.0055" under size. The shoulder needs trued.
The 3 jaw backing plate is 0.004" oversized. Lots of room for error there. No outside jaws so it won't work on many projects.
As of right now I'm thinking I'm just going to go with a 4 jaw so the undersized spindle nose will not matter. I get my outside jaws and no need to switch back and forth.
I'm getting ready to run to a surplus tooling place to see if they have a decent used 12" 4 jaw.
The 3 jaw backing plate is 0.004" oversized. Lots of room for error there. No outside jaws so it won't work on many projects.
As of right now I'm thinking I'm just going to go with a 4 jaw so the undersized spindle nose will not matter. I get my outside jaws and no need to switch back and forth.
I'm getting ready to run to a surplus tooling place to see if they have a decent used 12" 4 jaw.
- Joined
- Nov 24, 2014
- Messages
- 3,159
Great picture there. That flare on the flange and the galling(?) damage are dramatic.
If the spindle bearings are (or get to be) in good shape, you could cleanup the OD (just enough to be certain of minimum TIR) and sleeve any backing plate/chuck for a match fit.
Just thinking out loud.
If the spindle bearings are (or get to be) in good shape, you could cleanup the OD (just enough to be certain of minimum TIR) and sleeve any backing plate/chuck for a match fit.
Just thinking out loud.
I just found a really nice 12" Cushman 4 jaw for $120. I'd be happy with a 4 jaw. That diameter damage won't bother anything. Just need to face the shoulder.
Could you use some liquid shim? Build up the spindle, machine to size. Worked good on H-53 combining gearbox mount pads.
That is pretty cool but I don't think I'll be switching between chucks. A bit of clearance won't bother the 4 jaw.Could you use some liquid shim? Build up the spindle, machine to size. Worked good on H-53 combining gearbox mount pads.