Regrind Instructions for Your Cool-Tips
Cool-Tip for Plastics
Use a diamond Grinding Wheel with a grit size no larger than 180 mesh. A Green Silicon Carbide Grinding Wheel should not be used. It will produce a rough cutting edge on the drill-points and will quickly dull.
Use a Flood Coolant to prevent tiny heat check (small slits, cracks, or chunks) which weakens the cutting edge.
In a rigid setup, grind the 120deg. Included angle with a 10deg to 15deg heal relief angle. The grinding should remove a minimum amount of material but enough to produce a clean edge.
The web should be hollow ground to the original shape so that the cutting
edge has a positive hook all the way to the center. This can be done by
an experienced operator.
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INTERNATIONAL CARBIDE CORPORATION
32022 8th Avenue South
Roy, WA. 98580-9640
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