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Maintenance & Repair (cont'd)
A properly sharpened carbide edge
undergoes very little pressure in cutting.
A thin, sharp edge slices it way through
the material, minimizing resistance.
WARNING:
Carbide dust is harmful if inhaled. A respirator and safety glasses must
be worn while sharpening.
Grinding Equipment
Existing grinding equipment plus a special grinding wheel is all that is needed to
grind the teeth.
Items needed:
Any type bench or pedestal grinder.
Coarse grinding wheel.
"Green wheel" for carbide grinding.
General Grinding Tips
1. Teeth can be ground freehand since precision is not important. Any variance
between teeth will not be noticed and a tooth that is ground shorter in length
can be adjusted when mounting.
2. If possible, set the grinder up with a coarse wheel on one side, and the "Green
Wheel" on the other side.
3. Using the "Green Wheel", grind the end of the carbide until the edge is once
again sharp. Avoid grinding on the top of the carbide, which would reduce its
thickness and weaken it, making it more susceptible to cracking and chipping.
4. As the end of the carbide is ground
away, you will have to grind a relief on
the square steel shank. The steel must
be ground with the regular coarse
grinding wheel and not the "Green
Wheel".
5. Although the angle is not critical, always grind the tooth so that there is a relief
under the carbide edge.
A rounder dull edge creates high cutting
pressures because it must force its way
22
through the material.
GRIND STEEL
WITH COARSE
WHEEL
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