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Drive center ceased SCM T124 Lathe

7/23/20       
Thomas M Diel  Member

Website: http://thomasdiel.com

So I bought a used SCM T124 lathe a couple years back for $1,300.00 and knew the drive center was tight, but wow! Since I have time on my hands with art furniture commissions way down, freeing it up on my shop to do list. I would like to look at putting a Nova chuck on eventually.

This is the headstock, just to be clear and I have a 5/16"dia x 16"L SS drive rod thru headstock I have been knocking on, but do not want to go overboard.

I have used the penetrating liquid wrench over two days and lead mallet to no effect.

Questions:
Planning on mapp gas heating the threaded spindle and cooling the #2 Morris taper drive center? But outside of the aerosol dusters cans for computer cleaning how can I localize cooling the drive center to poopenshaffen it out?

Or should I just bite the Mcmaster Carr bullet and get the taper wedges?

Utube University has been no help except for Mr Pete aka Tubal Cain making his own wedges but for $12.00 I'll buy. It's not critical as I have an old Clausing metal lathe that gets me by, but am working on keeping wood and metal in their respective corners.

Anybody have any other tried and true suggestions?

Thanks,
Tom

https://www.mcmaster.com/wedges/drill-chuck-removal-wedges/

7/24/20       #2: Drive center ceased SCM T124 Lathe ...
rich c.

The issue will be cooking the seals and grease in the front bearing or bearings if you use a Mapp gas torch. But if you have been bashing on it with a mallet, you could have brinelled the bearings anyway. I've never liked Liquid Wrench, Kroil is the product to use for penetration around stuck parts. I'd try a piece of dry ice on just the drive spur before trying the heat on the spindle. Unless you want to remove the shaft and press off the bearings first. If all else fails, take it to a machine shop and ask them to remove it.

7/27/20       #3: Drive center ceased SCM T124 Lathe ...
Bruce H

Really? If you need wedges to get it off why don't you just order a set? I have a set laying on my desk for that exact reason. Much easier with them, almost impossible without.

7/28/20       #4: Drive center ceased SCM T124 Lathe ...
Thomas M Diel  Member

Website: http://thomasdiel.com

So, I had never used the wedges and wanted to know their viability, hence the reach out. Luckily, I have a friend Palmer Moynihan that had a set (minus No2's) but the no 3's and 6's fit and worked well. Saved me from ordering the wrong set and having to reorder.

Thanks Rich, - was holding out on the dry ice, and if had to use heat would have gotton on and off and cooled because the head grease zerk is pretty close by. Bearings sound and feel fine under light cut load & at all RPMs but time will tell, but tapped not whaled on it, but you never know and what the previous owner(s) attempted?

Thanks,

Tom

7/29/20       #5: Drive center ceased SCM T124 Lathe ...
Tom Gardiner

Late to the party but...
Do it have an outboard threaded spindle? If so you can use a face plate to press a rod against the drive centre. Always better to avoid hammering on the bearings


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