On Thu, 20 Mar 2008 22:35:53 -0400, "Tom Gardner"
wrote:

I can't seem to find loose 3mm balls, any ideas? I need to repack a linear
truck.


McMaster p/n 9292K33

If you're talking about an THK/IKO sort of linear bearing, those are
often selective assemblies. Graded balls are used to set the preload
and accomodate manufacturing variation in the rail and car.

--
Ned Simmons