Re: [CAD_CAM_EDM_DRO] Rong Fu spindles

From: <carlcnc@...>

> Anyone familiar with the bearings in a RongFu quill/spindle assembly?
> I am thinking of using with a DC motor for Z axis on a gantry router.
> I will occasionally want rpm's as high as 10,000.
> Are the bearings a fairly common size? hope so,and that I can source
> replacements with high speed ratings.

Hey Carl~!

Yep, very familiar, but can't remember the actual numbers of them.
I've rebuilt 5 or 6 of these things at work.
(I've used them for making cheap automated machinery,
one being a three headed mill (120 degrees apart) to
mill spirals in brass rod while it is fed through and twisted at the same
time)
I do know that I replaced them all with bearings rated to 7,500 rpm,
but couldn't tell you if they had one for 10,000 rpm, but I would think so.
I used Fafnir replacements.
When you pull them out, the bearing shop you order from can cross reference
them easily.

Hope this helps,

Weyland