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DRILL BIT SPEEDS

(In RPM - Optimum conditions. You may have to alter the suggested speed for best performance in your situation.)

Twist Drills Soft Wood Hardwood
1/16 - 3/16 3000 3000
1/4 - 3/8 3000 1500
7/16 - 5/8 1500 750
11/16 - 1 750 500
Brad Point Soft Wood Hardwood
1/8 1800 1200
1/4 1800 1000
3/8 1800 750
1/2 1800 750
5/8 1800 500
3/4 1400 250
7/8 1200 250
1 1000 250
Forstner Soft Wood Hardwood
1/4 - 3/8 2400 700
1/2 - 5/8 2400 500
3/4 - 1 1500 500
1 1/8 - 1 1/4 1500 250
1 3/8 - 2 500 250
Spade Soft Wood Hardwood
1/4 - 1/2 2000 1500
5/8 - 1 1750 1500
1 1/8 - 1 1/2 1500 1500
Circle Cutters Soft Wood Hardwood
1 1/2 - 3 500 250
3 1/4 - 8 250 250


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