Atlas 10100/mk2 Compound Tool Rest Reinstall

Azbrewer

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I just picked this lathe up and the previous owner had removed the compound head. I have it I just don't see what holds it on. I can't believe that I just screw in the set screws but there is no other indication of any clamping parts. Also what is the size of the snap ring on the shaft holding on the “clutch” used to disengage the direct drive system.
 
brewer,

I can't help with snap ring size other than tell you to call Clausing and order one. I think that the part number that you are talking about is 641-084. You have a ways to go before you have 30 posts and get access to Downloads but if you will PM me your email address, I will send you the operation and parts manual. You just need to tell me whether your machine has the early or the late carriage. The late carriage has adjustable mesh between the gear driven by the carriage traverse handwheel and the larger gear that it drives. On the early one, there is no adjustment.

If the PO removed the entire compound assembly (two major parts and a bunch of smaller ones), and if he didn't lose the two beveled pins in front of the two socket head set screws in the upper swivel below and to the left and right of the compound feed crank, then yes, you just tighten the two set screws until the beveled pins bear on the pintle on top of the cross slide. Turn the compound upside down and run each screw in until either the tip of each pin is visible or you see the tip of the screw. If the latter, you will either have to find, make or buy the two pins. If the former, confirm that with the compound inverted, the flat of the bevel is down. Hold your finger against the end of the pin and retract the set screws until the pin tip is barely inside the swivel base. Turn the assembly back over and set it down on the pintle. Rotate the compound around to 30 degrees and tighten both screws.
 
wa5cab,
thanks, that's what I was afraid of. I will PM then be able to call the parts by the correct names. There are no pins behind the set screws so I will make some, I have plenty of drill bits, will they make suitable stock?
 
Use 3/16 drill shanks, make them 1/2 in long, put a 30º angle on one end. I made mine from hardened drill rod, should have thought of old drill bits.
 
If you got the milling attachment with the lathe, it has the same bevel pins installed in it.

I used a 13/16" snap ring on my Mark 2, it fit perfectly.
 
The roller bearing headstock (which I believe you have) uses a 3/4" snap ring, whereas the ball bearing version (often Craftsman-branded) with the red bearing seals used a 7/8" diameter snap ring. The two spindles are different and there are two different size coupling collars too. I know cause I have one of each. Snap rings are sized according to the shaft size not the bottom of the groove size. Kinda strange.
 
If you do have the milling attachment and the pins are missing from your compound (we don't know that they are), mic the pin diameter and the length and I'll gen up a drawing from the one that I did for the larger pin on the 10" and 12". I suspect that you are going to find that the diameter is around 0.095", slightly larger than 3/16".
 
I don't have any attachments and now after more internet searching, I find I only have half of the compound slide. PO must have broken it. And a very ugly weld job to try and repair it. Looks like it snapped right where the tool post slides in. Did not come with motor either. My searching suggests that 1/4 HP should work, correct? It did have both a 3 jaw and 4 jaw chucks. My son works at a local machine shop and may be tasked with making the slide from scratch, he likes a challenge.
 
There is a compound on eBay right now, not sure if that will help. My manual says the motor is 1/3HP, 1725RPM. I am using a 1/2HP, 1725RPM.
 
"the diameter is around 0.095", slightly larger than 3/16".

Uh do you mean that .095 is slightly larger than 3/32? My pins were 0.187.
 
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