The proper grinding method would be to rough the pattern in with
our WA462 or BA463 wheel on a Weinig Grinder(or comparable wheel
for other grinders). These wheels are specially formulated
to grind Opti-Knife; as well as, other tough grinding steels.
You would then use our WA100 wheel to finish the profile in the
knife. This insures a smooth finish on the steel to eliminate
any lines from the 60 grit wheel. Customers that are jointing
Opti-Knife may find that the use of a fine grit wheel is unnecessary,
because the jointing stone provides a more than adequate finish.
For best results when grinding Opti-Knives, use a RPM that is about
500 RPM higher than normal. For example, if you usually rough
grind at 1200 RPMs, speed it up to about 1700 RPMs. If you
finish grind at 2200 RPMs, go up to 2700 RPMs. When
grinding these knives, a water coolant is used to keep the knife
steel from heating up and turning blue. By using the same
template when sharpening, the knife grinder can maintain the same
pattern with a high degree of accuracy. Opti-Knives are very
burn resistant at lower speeds and wheel wear is about average providing
the wheel is kept dressed properly.
The knife can then be joined with our 600 grit stone on high speed
machines (6000 RPM Spindles) or our 400 grit stone on 3600 RPM machines.
It is very important that the joint be no thicker than a hairline.
Remember, the #1 rule in grinding knives is Do Not burn the steel.
Once it becomes colored, you must grind down to rid the knife of
the burn marks. Finish of material is directly related to
the feed and speeds of the machine.
For further assistance or recommendations for your specific application,
call our customer service department (828) 628-4414.