Re: [CAD_CAM_EDM_DRO] Re: Re: leadscrew bearings / machine design(P.S. correc...

In a message dated 23-Oct-00 20:31:21 Central Daylight Time,
ballendo@... writes:

<< Take out the spacers and use ground face matched pair angular contact
bearings and you have a top of the line "fixed" mount. >>

Yep, and you machine the screw-end so it is a TIGHT interference-fit into the
bearings, and you machine your pillow-block of ONE piece, so the bearings
nearly press-fit into that, and "clamp" the end-one with a screw-on end-cap
(i.e., fine workmanship), you will have a FINE-running screw-mount! That
DOES make a difference! I saw the three arrangements for screw-end bearings
in the BSA catalog, and wondered, and then thought, "Well, with $3800 worth
of screws and ball-nuts, I might as well do the end-bearings "best way"!",
and I am glad I did! a 12' long 1.5" dia. 1/2" pitch ball-screw needs some
proper support!