Topslide clamping screw

[vic neweyParticipant @vicnewey60017]

[vic neweyParticipant @vicnewey60017]

I need a longer screw on the topslide of a vintage lathe, the one on it now doesn't seem to be it's original length and it won't hold a special accessory I need to fix on

I want to remove it and insert a longer one but not sure how they are traditionally fitted in ? screwed probably but has anyone tried to remove one?

Edited By vic newey on 22/11/2019 12:16:30

[not done it yetParticipant @notdoneityet]

I would expect it is screwed in?

I often remove studs from engines and other machines. I use a stud removal tool if they are tight.

[vic neweyParticipant @vicnewey60017]

Posted by not done it yet on 22/11/2019 12:43:48:

Looking at stud removal on Google it gives mention to using two nuts to jam together at the bottom of the stud and then a spanner the lower one, I think I'll try that and hope it screws out

 

Edited By vic newey on 22/11/2019 13:37:08

Edited By vic newey on 22/11/2019 13:37:33

[Nigel Graham 2Participant @nigelgraham2]

Careful: don't just try unscrewing it without examining the underside of the slide.

The stud might have a shallow countersink head on the end, or be staked in some way, so treating it as just a simple stud risks damage including possibly cracking the casting.

[Howard LewisParticipant @howardlewis46836]

Assuming that the stud was screwed in from the top, stud removal tools may mark the thread, especially if the stud is tight / corroded into place. But, if the stud is never going to be re used, damage should not matter, as long as it comes out without shearing off.

If it does, you are in the "centre, drill and tap" routine, so you need to certain of the thread (Looks like BSW to me? )

Howard.

[vic neweyParticipant @vicnewey60017]

Posted by Howard Lewis on 22/11/2019 15:47:28:

Assuming that the stud was screwed in from the top, stud removal tools may mark the thread, especially if the stud is tight / corroded into place. But, if the stud is never going to be re used, damage should not matter, as long as it comes out without shearing off.

If it does, you are in the "centre, drill and tap" routine, so you need to certain of the thread (Looks like BSW to me? )

Howard.

Yes, Whitworth threads are used on this lathe ( a Pittler) going to attempt removing it tomorrow

[vic neweyParticipant @vicnewey60017]

I got it out with using the two nuts technique, it took a bit of a pull before it finally gave a crack and then screwed easily out.

I have now fitted a longer one in and all is well!

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