..to clamp across a shear?.. ..I made one similar to Harold Hall’s –

http://www.homews.co.uk/page152.html

– but instead of using a separate ‘jaw plate’ and pin, simply drilled a hole & made a cut to leave a little ‘tongue’ to stop the point of the locking screw chewing the side of the shear.

Obviously you can adapt the ‘body’ design to hold a simple stop, clock, or turret. I use a plain rod with a collar on it so that I can use a gauge piece between that and the body to set depths etc..

I did make one some time ago . The idea was not to drill any holes in the lathe, which i did manage to acheive. In my tuby vids somewhere. Probably under Myford.

Steve.

Probably only for a Myford without a gear-box, but the Martin Cleeve design which utilises a clamped rod is very convenient to use. If you put a lockable collar on the rod and put a compression spring between it and the clamping block, by leaving the clamp loose and setting the desired travel by the collar, you can use it for screw-cutting. The end of the rod marks the length of travel and the spring absorbs any slight over-run as you dis-engage the half-nuts. When the rod is clamped the saddle is just arrested at the desired travel. I have had this accessory on my lathe for years now and wouldn’t be without it, in fact I made one for the rear of the lathe which uses the tapped holes for the taper-turning attachment. Using both, you can traverse the saddle to fixed stops in either direction.

I use one like Nigel, 1″ x3/8″ BMS, also borrowing the clamp assembly from the fixed steady. Noting the same caveats about swarf.

John

That’s neat! I like the recessed screws. Do they share a key with a QCTP with square-headed tool-clamping screws?