Re: long ball screws

--- In CAD_CAM_EDM_DRO@egroups.com, dougrasmussen@c... wrote:

> Bill,
>
> No, they're not flap screws. They're replacements or reworked

screws

> off some very large machine tool. Obviously high quality and
> precision ground not rolled. The original cost had to be well into
> the thousand$, but who needs a ball screw that large?
>

We use ball screws 40mm dia and 45mm dia by 3 metres long for laser
cutters on the X axis.
Made either my Thompson or Jemma Tec these cost around 3,000 UKP each.