BSF and 2 BA used all over MLS7s until near the end when they were probably finding new supplies were getting expensive and Nottingham started using some metric almost certainly to keep costs down.

My own is an early 1970s model with no metric.

Franco:

Do you mean the screws which hold the saddle to the apron? If so, note that they have an over-size head to allow for front-to-back adjustment.

I understand that difficulty in obtaining these in BSF caused Myfords to use metric fastenings here on later lathes.

On mine it's 1/4 BSF

Roy

Edited By roy entwistle on 22/12/2021 14:19:26

You need a 1/4 BSF nut and 1/4 washer to retain that Thread Indicator Dial.

Howard

I think Franco is making a new bolt to work with the Hemingway multi-position carriage stop.

Translation " Hurray, I did it.Here are the photos with screw.I plan to make a stop carriage like this "

Edited By ian j on 22/12/2021 21:43:42

Edited By ian j on 22/12/2021 21:47:26

It pulls a rod carrying a detented disc with multiple ?rod or ?screw stops up against a kind of 'arrestor-block' , I think..

Diogenes II I would have thought that that would have been on the chuck side of the saddle, but I don't know the Hemmingway setup

Roy

Sorry Franco your original posting was for a 1/4 bsf thread not a S7 multi position carriage stop.