7/8" x 5 tpi acme threaded rod

Bought a Jones and shipman 540 surface grinder recently, its old but complete and in good condition overall. However the crossfeed screw and nut are worn, which i have been told is usual, as the powerfeed "kicks" the screw when powerfeed is engaged.

They are available from jubilee mac, for nearly £600 ! So i want to make a new screw and nut. It would make life easier if i could buy the threaded rod rather than having to screwcut one.

Anyone know where i might be able to buy threaded rod in this size ?

Many thanks.

I recall there have been one or two suppliers of Acme threaded rod suitable for leadscrews mentioned in threads on here in the past so if you sit down and search the site for Acme threaded rod you should find them ... eventually.

Certainly available from the USA

https://www.roton.com/family/acme-right-screws-and-nuts-7060204/

I've only seen 3/4" or 1" over here, though you could try This Firm

http://halifaxrs.com/products-view/lead-and-power-screws/

Bill

And you'll need to determine if it's right or left hand thread as many leadscrews etc are the latter.

A cross-slide on any machine where the handle doesn't travel with the slide will be LH thread, unless it's geared.

Edited By Pete Rimmer on 07/05/2019 06:47:26

also try www.ukbolt.co.uk

I needed some TR20 acme for my Sip bandsaw......

1mxTR20, rh threaded rod was less trhan £16......

works a treat......

As you are intending to change both screw and nut, is it that important to have 5/8” ACME 5tpi?

A 16mm x 5mm pitch trapezoidal is likely easier to source?

An alternative might be to cut the current screw to remove the difference in thread from middle to end and make a new nut to fit. Probably last years...

Edited By not done it yet on 07/05/2019 07:45:50

Try **LINK** . I have used them in the recent past and were very helpful

How about a ball screw? Would probably need 16 x 5 mm, much less friction, need to protect from grinding dust, Dyson vac hoses reputed to make good bellows.

The thread is right hand, which makes things slightly easier. I would prefer to keep the same size thread as the original as the dials would be miles out otherwise. I suppose i could use a dro but was not intending to. Thanks to all for the links, i will either email or ring them over the next few days and see what i can chase up. The nut i can make up myself. Whats the best brass/bronze for that ?

Course it is, the handle is on the front of the valve block which travels with the y-axis. I must have had a brainwarp earlier.

I just bought a piece of this material and a bronze nut from Roton.

I know you are on the other side of the pond, but I got great service on material that is hard to find.

Peter