The spindle bearing is an adjustable taper on those grinders from what I
remember. It is possible that someone did not set the bearing right.

Tony

"David Anderson" wrote in message
...
I own an ancient Delta-Milwaukee "Toolmaker" surface grinder that is only
used about two hours a year, but it occasionally fills need that nothing
else will perform. It could be 50 years old. Both x, y, and z feeds are
manual. It is fitted with a Brown & Sharpe magnetic chuck. Lately, after
months of idleness, the surface finish after taking only a light 0.002-inch
pass is terrible. I have no operating manual or parts book; can't even
find the serial number.. The brass nameplate says "Only use balanced
wheels". Any suggestions as to a remedy, and who can balance a grinding
wheel? Thanks, Dave Anderson