Myford ML7

The saddle on my ML7 no. K77035 gets progressively tighter when moved towards the tailstock. Measurements across the front shear show large variations, measurements across the bed show less than 1 thou.

Gaps between rear of rear shear and saddle were 18 and 20 thou.

In ME vol 167 no. 3908, 1-14th Nov 1991 postbag page 501, J.B. Millar presents a solution for my problem which appears to be a very simple and hopefully within my capabilities.

Have any fellow owners carried out this modification, and are there any snags?

What method of restraining the new spacer is adopted, and what provision for oiling is necessary?

David

mine is exactly the same - would like to know how to fix it??

A method I have used sucessfully on my Super 7 was described in this thread

http://www.model-engineer.co.uk/forums/postings.asp?th=64457

HTH

Nigel B.

Thank you Nigel Barraclough for the reference, most helpful.

Nigel J2, the site recommended will give all the information you need.

David

Thanks. I read it. I didnt understand it.

Nigel, basically the early lathes used the outer and inner vertical surfaces of the front shear of the bed to guide the saddle assembly. Later lathes used the outer face of the front and rear shear leaving the inner surfaces of both shears exclusively to guide the tailstock. With the later lathes, because they use the outer surface of the rear shear to guide the saddle, the saddle is also wider at that point and therefore there is a larger area in contact with the shear and less prone to allowing the saddle to rotate off axis on the bed. The outer surface of the front shear nearest the operator is the surface the gib strip is adjusted against in both cases.

The article is how to convert the early saddle in such a way that it mimics the later saddle arrangement by making use of the unworn rear shear outer surface.

Edited By Chris Trice on 04/05/2012 23:04:20