On Tue, 21 Mar 2017 16:29:15 -0500, Jon Elson
wrote:

wrote:


I apologize for jumping in without having followed the entire thread, but
has anyone suggested that it could be as simple as a cracked bearing ball?

Oh, I think a cracked ball will go from bad to worse at a very rapid pace.
Possibly a dinged ball in the backgear assembly (like when it ran over the
bits of the retainer cage) could just get noisy and stay that way for a long
time. That's the kind of shape my back gear bearings were in, and they
generally made a loud whirring noise. But, a really cracked in half ball
ought to be fairly disasterous.

Jon

Bridgeport heads are not loaded heavily enough to crack a ball. So it
one was busted..it was a flawed ball...and they are very very rare.

Did the OP track down the noise with the screwdriver stethescope?

Where was its home?


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus