ML7 toolpost Thread

[Ian MontanaParticipant @ianmontana44925]

Hi

Looking to mod my lathe tool post … the thread on the post is 7/16” diameter

would the thread have been BSW I don’t have any thread gauges to check it with

cheers

[Ian MontanaParticipant @ianmontana44925]

[noel shelleyParticipant @noelshelley55608]

could be but more likely BSF ! Noel.

[John HaineParticipant @johnhaine32865]

According to something on Google RDG sell/sold a replacement stud+nut which was 7/16 UNF. Certainly when I made my replacement toolpost I got myself a long HTS 7/16 UNF from my local fastener supplier so that it fitted the Dickson block properly.

[Martin of WickParticipant @martinofwick]

If it is in its unmolested form it should be BSF – having 18 TPI, you can check with a rule.

Edited By Martin of Wick on 06/03/2022 18:47:56

[SteviegtrParticipant @steviegtr]

I can confirm that it is indeed BSF. I fitted a quick change tool post & made a new sleeved nut for the top of it. I put a video on youtube of doing it. If you search steviegtr on youtube you will find it.

Steve.

[Ian MontanaParticipant @ianmontana44925]

Any good guides around for changing the belt. The main spindle looks easy to remove to fit the belt to the bottom pulley. Is it easy to do the top spindle and clutch ?

thanks

[SteviegtrParticipant @steviegtr]

Hi Ian.

I changed all the belts on my Super 7 when i bought it a few years ago. From your model year i would say if you have a clutch it will be the early type. It is a cast iron horseshoe type. It expands onto a drum. I have no experience with that version other than knowing from friends machines that.

The cast iron ring is very brittle & can break in half if not looked after. Also with mine not having that type of clutch , cannot be sure how easy it is to strip.

I think i do have a ML7 manual in PDF format. If i have you are more than welcome to have a copy.

With that you can see every component & work out any problems before stripping down.

I bought genuine belts from Myford & have never had any problems with slipping at all.

Steve.

[Ian MontanaParticipant @ianmontana44925]

Cheers Steve – would appreciate a copy of the manual

[HopperParticipant @hopper]

The Myford.co.uk website also has exploded parts drawings of the lathe, which are pretty handy.

[SteviegtrParticipant @steviegtr]

Posted by Ian Montana on 07/03/2022 09:38:26:

Cheers Steve – would appreciate a copy of the manual

Hi Ian. You need to send me a P.M with your email address.

I will then send you the File.

Steve.

[DMBParticipant @dmb]

Up to a certain time, all threads were BSF or 2BA. Last few years some Metric was used, probably when new stocks needed to be ordered and Imperial becoming comparitively expensive. Leadscrews, of course, were 'Specials.'

Threaded hole in Left hand side of carriage is BSF, fit the Traveling Steady. Row of tapped holes front and below Headstock to fit Gearbox, are BSF. Leadscrew bearing brackets secured by  steel pins and 2BA screws. Outer end of changewheel pegs have a washer and 2BA screw. Banjo nuts = BSF. Row of screwed holes along rear of bed to fit massive cast iron taper turning attachment are BSF. I think only 2BA  and 1/4" or 5/16" BSF were used. Much commonality between the bed models and their common accessories.

Edited By DMB on 07/03/2022 15:20:59

[DMBParticipant @dmb]

Some changes executed on Myfords were due to improved design. Good example being later vertical slides had twin (smaller diameter) securing screws to increase the grip. No doubt that the changed clutch design was a great improvement.

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