Re: [Emc-users] Rattling splines Re: Automatic Probing.

[Jon Elson]

I had an ancient (1938) Bridgeport round-ram mill with an M 
head.  It had bad wear on the spline and rattled horribly 
under load.  I figured what was happening was the top of the 
spindle was twisting a bit when the end mill tooth dug in 
and then when the tooth came out of the cut, the released 
spring would cause it to jump ahead.  So, I made some shims 
out of brass shim stock and put them into the space on the 
UN-DRIVEN side of the spline to fill up the slack there.  
These were just 1/8" wide strips of the shim stock, long 
enough to pass all the way through the driving spline of the 
pulley and then bent over at the ends to keep them from 
working out of the pulley as the quill moved up and down.  
This hack worked marvelously to quiet the racket.

Jon


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