Re: High Speed Spindle

> Yes. By all means. The "housing I.D." should be exactly the same

as the

> bearing O.D. so that they are an "interference fit" (not quite

"press-fit").

> Even 5 tenths oversize is too much. UNLESS you have some kind of

face-flange

> that screws down over the outer race, to "clamp" 'em in place.

Which is

> probably the best way to mount 'em, anyway! In that case, make a

"shim washer"

> of 0.001" or 0.002" shim stock and place that between the two inner

races, to

> create JUST the right pre-load.
>
> I am GUESSING you intend to use a belt-drive to a parallel motor?

I have a 22000 rpm dc motor I want to gear 2 to one for about 40000 rpm.
Shouldn't the bearing ID be a press fit on the shaft? Or should it be
a "interference fit" like the OD? I am planning on turning the shaft
to a shoulder pressing on the bearings with the shim between them then
screwing in a retainer into the housing. Pulley end I was going to
have tight sliding fit with ID of bearing to shaft, shoulder not
touching id when retainer is screwed in. The extension is made for
high rpm work and I am sure th da collets will work better than what i
could make at home. Plus they allow different sizes to be used instead
of just 1/8. BTW Thanks for the reply. Hope this isnt off topic.