I cannot disassemble the X axis lead screw

A Newby question please:

I’m stripping and cleaning up my Senior M1 mill. But I cannot seem to disassemble the pictured lead screw bush/bracket assembly.

I identified what I think is a taper pin through the steel collar - see close up.

obviously being very careful to hit the narrower end, nothing is budging and even managed to bend the brass drift...!!

To save any possible damage I’ve stopped to ask one of your chaps fir suggestions.

Thanks in advance.

Edited By choochoo_baloo on 13/11/2019 17:05:17

Use a steel pin punch, obviously you are punching the thinner end but if the taper pin has sheared then the collar well may have rotated slightly so is out of alignment with the through hole in which case you might try drilling the pin out from both sides of the collar with appropriate size drills. If it has sheared then you need to look at why/ what caused it to shear ( no intentional granny & eggs scenario )

George

Has it got power feed? If not surely unlikely to shear?

Don't have a Senior but shouldn't all the other bits the other side of the bracket come off? Normally they are all adjustable to take up the slack so do come off. The bit you are pointing to is normally never meant to come apart again, otherwise they would have used a screw.

Thanks chaps.

I was thinking ‘this probs is meant to stay together’, hence I stopped and sought advice.

Please confirm - will these few drift blows, with a pein hammer, have likely distorted/gouged the internals? Being a novice, I’ve no idea how delicate this sort of assembly is.

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Below is the top down view of saddle for John Haine. Yes; the power feed engages that dog clutch bronze thingy.

I agree with Bazyle, you would only really take that bit apart if you were fitting a new leadscrew.

Why dont you start at the handle end.

I removed that taper pin on the one I was working on simply because I was increasing the length of the leadscrew thread, otherwise I would have left it alone. The pinned part needs supporting while you punch the pin out, just hitting the small end of the pin risks bending the leadscrew.