On Thu, Jan 27, 2011 at 01:42:09PM +0000, andy pugh wrote:
> 
> My manual-to-cnc conversion of a small rotary table ended up with me
> adding a needle roller support at the worm end, and a pair of angular
> contact bearings outboard to take the thrust loads and eliminate the
> end float.
> 
> It now could really do with having the rear bearing surface remachined
> to be parallel to the front bearing surface. Probably easiest to do
> with a freshly-skimmed faceplate on my lathe.

Many thanks for the additional advice and reality check. There go any
delusions along the lines of "there's gotta be a shortcut quick fix".

I'll gently take it apart, and see what machining is required to
accommodate small thrust bearings.

Is slack best taken up by carefully measuring existing slack, almost
making enough room for the thrust bearings, then skimming to fit?
(A shim is easier to trim to size, perhaps.)

Erik

-- 
The fastest way to get an engineer to solve a problem is to declare that the
problem is unsolvable. No engineer can walk away from an unsolvable problem
until it's solved.                     - Scott Adams, The Dilbert Principle


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