Todd responded:

> Jeff Carver wrote:  > there are lots of them, and it's a simple task to
> bore the master out to
> > a specific diameter and install stuff that matches that diameter.
> > 
> > Welding is labor intensive, machining after welding is part specific
> > and not well suited to high volume production (low $).
> > 
> There is the posibility of grinding out the races to a larger size and
> using larger balls.   Todd

Good point.  The set-up to re-machine one of those parts is the same 
as if one was machining it from bar stock, but with less to hang on 
to.  Probably not cost efficient.  Also have to add in the operator 
time for inspection of a cleaned part to see if it is worth re-machining.
But an observation well made.

- Jeff
gonna keep ya thunking