The three basic operating conditions which generate excessive heat along with corrective actions are:
- Excessive cutting speed. Keep the RPM’s low.
- Excessive depth of cut. Keep the chip curling loose.
- Dull tool bits. Speed and cut depth accelerate tool bit wear which compounds the problem.
Cutting speed (RPM) is actually a range depending on the material conditions. Some judgments, based on the cut conditions must be made to select the actual speed. Generally the cutting speeds should be:
Time / Head Revolution
4″ (101.7 mm)
5 to 10
6 to 12 seconds