Re: [CAD_CAM_EDM_DRO] Re: Angular Contact Bearings and Ballscrews question

At 09:37 PM 6/24/02 -0000, you wrote:

>> Would tapered roller bearings work just as well? Or are they too
>long
>> and bulky or something?
>
>A poor choice. Runout may be a problem, as a screw rotates, if the
>screw moves axially because of runout in the bearings, you have lost
>all your accuracy.

You were doing really well up to here .... many if not most larger machine
tools have TR bearings on spindle, and they evidently don't have excess
axial runout there, right? In fact given the same degree of inaccuracy in
races, because of line contact instead of point contact, TRs probably have
less than ball types.

Regards, Hoyt


Anti-virus request: Please do not add this email addy to address books
Belfab CNC - http://www.freeyellow.com/members/belfab/belfab.html
US Best MC - http://www.freeyellow.com/members/batwings/best.html
Camping/Caving - http://www.freeyellow.com/members/batwings/caving.html
Better be poor than fat in the eye