Re: Ball-screws

--- In CAD_CAM_EDM_DRO@egroups.com, "James Owens" <wotisname@l...>
wrote:

> Hi All,
>
> Bill and I have, for a few weeks, been looking into the possibility

of

> fitting Ball-screws to my Bridgeport like machine, him in the

States and me

> in the Britain.
>

[Snipped ]

> 1) McMaster-Carr
>
> 1" dia. 48" ball-screw in the two lengths, 0.004" error/foot and a

lead of

> 0.250" including Qty. 2 ball-nuts = $166.00.
>
> 2) Rockford
>
> 3/4" dia. 48" ball-screw in the two lengths, 0.003" error/foot and

a lead of

> 0.200" including Qty. 2 ball-nuts = $423.00.
>

Terry,
Judging by the error and price I would say that these are rolled
screws and are not suitable.
Why do you worry about metric / imperial. The controller will take
care of that.
I have an imperial Beaver mill 0.200 pitch screws, imperial dials but
I work 100% in metric from the controller.

Places to try in the UK are Thompsons who are somewhere in Devon and
a company called Jenna Tec at Ilkeston Derbyshire 0115 99440446
Joe Gray runs this small firm and they actually make ballscrews there.
Often have recons in stock as well.