South Bend 9 lathe Clutch issue

[Talber8]

1948 SouthBend 9b Lathe - developed a clutch engagement issue.

After playing with creating knurls in steel, the clutch for the auto feed stopped working. With the clutch knobbed turned in until tight (3/4 turn) and the selector engaged, the feed is not engaging, and the hand cranks can still be used.

im assuming from the pressure of knurling I may have bent something or flexed a piece out of position.

im assuming the carriage needs to come off but any advice on what I should be looking for? I’ve never taken the carriage off myself.

 

[Jim F]

Can't help with the clutch issue, I have a C.
This is a good reason to make a clamp type knurling tool,though.

 

[Talber8]

Can't help with the clutch issue, I have a C.
This is a good reason to make a clamp type knurling tool,though.

yeah my take-away is don't do this on steel again, lol

 

[markba633csi]

I don't think you broke anything, probably the cone clutch needs adjusting/shimming or is worn. Pretty sure you have to remove the carriage to fix
-Mark

 

[Talber8]

Carriage removed, nothing glaring obvious. When I turn the clutch it spins freely, and those half plates move freely. But when I screw it clockwise, it should tighten up and and put pressure on the outside right? They don’t it just free spins

 

[lordbeezer]

Something doesn’t look right with half plate on right. Have you took clutch apart.

 

[Talber8]

Do I need to remove worm gear to remove the clutch?

 

[lordbeezer]

No. Best I remember unscrew knob on front. Half plates should be loose enough to come out. Check key inside worm for wear while apart

 

[lordbeezer]

You should be able to see what’s not working. Tighten knob. Plates should lock to gear

 

[Talber8]

I’m not sure what the issue was, but disassemble/reassemble fixed. I wonder if it was bound at the knob, or where the knob shaft comes out. I put a good amount t of force on it while it was on the lathe, enough that I knew it was t right at all. It was dirty but not abysmal. If it were to happen again, I think I would try with apron still on to losen the star knob a little.

when it happened I was knurling with auto feed, and after that was issue.

I don’t know, but learned a few things! Thanks for the inputs.