We just got a centerless grinder. Not new, refurbished.
I don't know anything about it, never even seen one before except on
Do you have to always move the shaft or roll from one end of machine to the
other after each pass
or some newer machines have some way of reversing this.
With big rolls it is a pain for the operator to use a crane every time.
I'm not actually running this machine but few of us at the shop are curious.
None that I know of but then again I'm only loosely aquainted with the
process, I've a friend with a grind shop has a pair of centerless in there
I'll call and ask him if you like even though Ive never seen him do anything
other than one-way through feed except for rough plunging.
I don't see how. The regulating wheel and in some cases the grinding
wheel are tilted in relation to each other. This is what causes the part
to through feed. To reverse the feed you would have to tip the regulating
wheel in the opposite direction.
Obviously this isn't impossible, but it couldn't be done while the wheels
are in contact with the work. The next issue would be size control.
Tilting the regulating wheel in the opposite direction could easily
influence the size. Plus when you feed through, the leading edge of the
grinding wheel is roughing while the edge where the work exits is more
loke the "spark out" part of the cutting action.
All that being said, it should be fairly simple to automate the grinder
to take to passes. After the work exits, it could be kicked off to the
side, sent back on a track, kicked back into the track in line with the
wheels, then given a push into the wheels to get it going. The grinder
would obviously have to be programmable in order to take passes at two
I'm sure some c'less grinding company like Koyo could figure something
out for you. Or an aftermarket automation house.
In Centerless grinding there is a way to reverse the feed of the part
that you are grinding when the part has reached the end of the
wheels. This is usually only done on large bars, and best used on #3
EA Cincinnati centerless grinders. I have customized These machines
to do this forward and reverse grinding on bars up to 17 7/8" OD by
175' long on solid bar. With the larger parts its best to do this
style of grind with power rollers to help assist the regulating
If you have any other questions on centerless grinding feel free to
message me any time.
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