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Heat is caused by friction. Friction is caused by too much speed or pressure or a blunt bit.


Solution = sharp tools, correct speed and pressure.


I also agree with Doug re: saw tooth bits.


Or if you can justify the cost:


FAMAG 1622.040 40mm Bormax Forstner


or these:


Colt Sawtooth Forstner Bit - John Davis Woodturning Centre


or even:


FAMAG 1663.040 Bormax3 Carbide Tipped Forstner Bit 40mm


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