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To properly sharpen a
cutting tool, both the O.D. (outside diameter) and the rake (face) must
be ground. Grinding only the face will not optimally sharpen the tool because
the wear land often remains on the O.D. The proper way to sharpen a tool
is to grind the O.D. and rake grind the face to a mirror finish. If both
are not properly ground, a razor-sharp edge cannot be obtained, and the
reground tool will not cut as well as a new tool.
A dull or improperly sharpened bit will break due to the increased feed
pressure. A high percentage of all tool breakage is due to worn, "ovalized"
collets. To ensure maximum performance and life of your router bits,
clean and/or replace collets on a regular maintenance schedule.
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