Myford super 7 tailstock thread

When I get home later I will do a sketch of the required parts and get some dimensions.

The bronze bush is top hat shaped, free floating until the bolts are tightened to allow it to align to the tailstock bore/barrel instead of relying on the thread if that makes sense.

When I was contemplating making the barrel I thought to use a bit of thick wall tube, thus negating to drill a long hole, it is only a clearance hole.
Another worry I had was the morse taper, getting it square/ true etc. I was going to put that in first in the tube, put a dead centre in it and machine the o.d down to the finished diameter. Basically between centres.
I was lucky enough to find the missing parts so I gave up making them!

I’ll be back!

William

David/Noel

Here is a drawing showing the basic dimensions. Any more questions just ask.

If you right click on the image and select open in a new tab they are a lot clearer.

Ian

Edited By ian j on 10/01/2023 16:40:51

Edited By ian j on 10/01/2023 16:45:02

Thank you Ian for your photographs.

I do not have a proper CAD system but will probably try to do some proper drawings now I have your measurements.

I have been otherwise engaged tonight, but for the moment I have measured the thread on the nut and like you I make the thread to be 1.375" and it is 20tpi. I have only measured quickly with a vernier and my tailstock barrel seems to be 1.111" Diameter. I shall measure more accurately tomorrow with a micrometer as that seems to be a very strange figure either in imperial or metric!

Thanks for your help. Please bear with me as I am a bit slow at present due to a health problem.

William - I shall be interested in any measurements. If the barrel turns out to be 1.25" dia. it would be useful as I could use a length of Silver Steel (Drill Rod to our friends over the Atlantic)

I am hoping to make it so that when retracted it can either stop at the end of natural travel or further out to pop out a taper tool.

Kind regards

David

David.

When I measured the barrel with a digital caliper I measured 1,115" like you I thought it was a odd ball size but pot it down to me so rounded it up to 1.125", Just measured it again with digital micrometer and get 1.114". I suppose it's just has to be a nice clearance fit in the tailstock casting.

Ian

I have spent hours trying to upload a drawing of mine to my album - or simply to a forum post and cannot remember how to do it.

Are there instructions on the forum? Yes I know it has to be Jpeg which isn't the best, but I have converted from PDF to JPG and still cannot get it into my album.

Yes I know that I am getting old - but is there a pointer to instructions on how to do this?

Can anyone help?

Kind regards

David H

Good evening all, those who have a lever feed tailstock with "bits" missing have the ML7 lever feed, the missing "bits" convert it to enable use on the S7.

Robert Butler

.

This should trigger your memory, David : **LINK**

https://www.model-engineer.co.uk/forums/postings.asp?th=103028&p=1

MichaelG.

Hi David.

I've uploaded YOUR drawing for you here.

Ian

Edited By ian j on 24/04/2023 18:53:38

Thank you Ian for your kind help.

I did manage to upload the drawing to my album and I appreciate your help. Unfortunately due to time pressures with my project to convert my tailstock to lever feed, I have not progressed much further with it and I want to complete the conversion of the tailstock on my machine before perhaps inadvertently misleading others.

Kind regards - I will return to this conversation in due course.

David