Re: [CAD_CAM_EDM_DRO] MiniRobo

Hi Dennis,

You could look at the method I am using on my little miller to support the
leadscrews. I am using the ball bearings that are made for the ends of the
old Hoover Junior vacuum cleaner. They are a hardened steel cup for the
outer race and a shaped inner race which provide both end thrust and a
self-aligning capability. I have popped a couple in a tube inner races
facing, with a spacer collar which is fixed to the leadscrew between them.
A screwed end cap on the tube adjusts endshake and is secured with a blob of
paint - on my machine it has given me undetectable backlash and free
movement for less than half the price you quote, and that was buying the
bearings retail.

Ian
--
Ian W. Wright
Sheffield UK

----- Original Message -----
From: "Dennis Bohlke" <dbohlke@...>
>
> It is a cheap way of absorbing the Axial thrust. A better design is to
use
> two angular bearings, but the cost is considerably higher. Each bearing
> costing about 12.50 each and two required per lead screw.
>