Thanks to all respondents to my question, especially to Jim Wilkins who
added a link to download the original Rockwell Operating and Maintenance
Instructions (6 pages). I tried the first suggestion to dress the wheel
with a diamond tip, and the finish improved 200% with no washboard. I will
study the manufacturers pages for additional help. Again, thank you all.
David Anderson, Cedar Hill, TX

"Jim Wilkins" wrote in message
ups.com...
On Aug 27, 5:47 pm, "David Anderson"
wrote:
I own an ancient Delta-Milwaukee "Toolmaker" surface grinder ...
...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

http://www.metalworking.com/dropbox/...structions.pdf

I don't believe they are capable of the smoothness of a normal surface
grinder due to flex in the bolt-on round column that supports the
swivel head. Mine only gives a smooth ripple-free finish if I feed it
one division (0.0005") or less and turn the Y feed slowly so left and
right passes are slightly diagonal to break up the self-reinforcing
washboard-road effect.

Jim Wilkins