My rolling mill rollers get oiled

Hi All,

I’m on the road, with no ability to follow a thread back. Last I
remember, this thread was talking about how to get your rolls
refinished, correct?

If this is the case, and the centerless grinding reference is a
suggestion for refinishing rolls, don’t. Centerless grinding is
absolutely the last thing you want to have done to your rolls.

Centerless grinding depends on the accuracy of the part surface and
the abrasive wheels for accuracy. Which is to say, very little. The
main advantage is that it’s quick, and easy for production.

For rolls, where concentricity and parallelism are critical,
grinding between centers is the only way to go.

Sorry to be the bearer of expensive news.

Regards,
Brian Meek.

Rosenthal Jewelers supply in Miami FL refinishes rollers at a
reasonable price and the quality is more than adequate. They send
one’s rollers out and one can indicate the finish if necessary( 6
microns, 12 microns, etc.). They always come back to me mirror
bright and I have never had a problem with the works quality- no
special processes need be specified as they have been doing this
service for many years and generations of jewelers have never had to
even hint at “centerless grinding” as a requirement. A machine shop
however may need to know what you are going to do with the cylinders
though as they do not specialise in jewelry applications so you may
need to tell a machine shop they must also be case hardened after
refinishing!

have never had to even hint at "centerless grinding" as a
requirement. 

It is probably best that you have Rosenthal do it for you because if
you were to specify centerless grinding it would ruin your rolls,
the correct process is grinding on centers.

A machine shop however may need to know what you are going to do
with the cylinders though as they do not specialise in jewelry
applications so you may need to tell a machine shop they must also
be case hardened after refinishing! 

Unless one knows the exact type of steel in question applying any
hardening processes to it is like playing russian roulette. There is
a wide variety of steels that have been used in rolling mill rolls so
without some clue to the makeup of that particular roll asking
someone to harden it will likely end up with a non functional roll.
Unless the roll has been severely trashed the likelihood that enough
metal would be removed by occasional clean up grinding even over a
couple of owners lifetimes is very low. If you are ever faced with
that problem the better course is just to have the rolls re-made. It
is not cheap but on a quality mill it will be less than a new mill
and will result in a set of rolls that should last another couple of
lifetimes.

James Binnion
James Binnion Metal Arts

Hi Jamie
My name is Michael and I’m looking to get both my flat rollers and my wire rollers refinished.
The company you used in Dayton , did they do the whole process for you?
I’m just worried about sending my rollers somewhere that don’t know what they are doing. If you used them and we’re happy I would just send my rollers there.
Thanks

I use 3 in 1 after a light cleaning with simichrome polish, especially after rolling copper…Rob

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