It Works-Follow up questions: Re: Linear bearings - how to reload?

Jan and others:

Thank you, I was able to squeeze them back in without problem.

I'm missing a few balls. I've located a source (McMaster-Carr), but
I'd like some advice as to whether the ones I picked out of their
catalog are appropriate.

Description:

Precision Grade Chrome Steel Balls conform to ASTM A295. Made from
ANSI Type 52100 steel. Widely used in precision ball bearings, these
balls are through hardened for maximum strength. Grade 25 balls have
a diameter tolerance of +/1 .0001" and a sphericity of .000025".

Also, there are no lubrication points that I see on the ball
bushings. Do you recommend I oil them (if so, with what weight) or
pack them with Moly gear grease?

Thanks for the help,
Jeff

--- In CAD_CAM_EDM_DRO@yahoogroups.com, JanRwl@A... wrote:
> Jeff: Since you are ALREADY panicked, guess it won't much ADD to
your misery
> to ask if you can REMOVE the ball-bushing in question â€" take it
plumb-OFF the
> shaft. Sometimes, that is just about the ONLY way you can get
enough "play"
> (aka "slop") between the ball-return groove and the hardened
grooved bit of
> steel the balls roll in. That bit of steel must obviously lift
away from the
> round-way JUST enough yo letcha push the balls in.
>
> Things may "seem" to work even if you have several balls missing,
but don't
> forget, a relatively small % of the total # of balls are actually
supporting
> weight/force at any particular time, so if more than one or two are
missing, the
> "stress" on what's left will PROBABLY cause undue wear-rate, if not
imminent
> destruction.
>
> I never saw ball-bushings with a HOLE into which one could push-in
balls.
> This Thomson stuff?
>
> Lotsa luck! Jan Rowland
>
>
> [Non-text portions of this message have been removed]