Re: Pre load specification

Wally,

What I meant was, how is the PRE-LOAD specified? Thanks

Ron

--- In CAD_CAM_EDM_DRO@egroups.com, "Wally K" <cnc4me@u...> wrote:
> --- In CAD_CAM_EDM_DRO@egroups.com, r_fl_z@h... wrote:
> > How are ground pre-loaded bearings ordered/specified? Is the
> preload
> > specified in thousands of an inch (or similar)? I believe
Ballendo
> > said they could be ordered from the manufacturer pre-ground, is
> this
> > what is typically done, or is the preload accomplished by the
end
> > user? Finally, how is the preload inspected? For instance, since
> the
> > torque on the lead screw nut affects the final preload (as I
> > understand it), how is the nut torque chosen? How does this
torque
> > relate to the final pre-load?
> >
> > Thanks in advance,
> >
> > Ron
>
> The ground preloaded bearings are not specified by thousands of an
> inch. They are found in manufactures catalogs under the name
> of "angular contact thrust ball bearings" You pick them by the
shaft
> diameter. In the INA catalog there are 2 bearings to choose from
for
> every shaft size. The differance being the size of the outside
> race. The larger race has slightly better loading. Quick look
says
> loading varies from about the same to 40% better depending on the
> bearing. Prices for 17mm to 20mm bearings are from $17USD to
$24USD
> depending on the shield options.
>
> Wally K.