Woodworkers Club of Houston
Drill Bit Speeds
(Sizes are in inches and speeds are in RPMs)
|
Twist |
Softwood |
Hardwood |
Acrylic |
Brass |
Aluminum |
Steel |
|
1/16-3/16 |
3000 |
3000 |
2500 |
3000 |
3000 |
3000 |
|
1/4-3/8 |
3000 |
1500 |
2000 |
1200 |
2500 |
1000 |
|
7/16-5/8 |
1500 |
750 |
1500 |
750 |
1500 |
600 |
|
11/16-1 |
750 |
500 |
----- |
400 |
1000 |
350 |
|
B&D Bullet Pilot-point |
Softwood |
Hardwood |
Acrylic |
Brass |
Aluminum |
Steel |
|
1/8-3/16 |
3000 |
3000 |
3000 |
2000 |
1500 |
3000 |
|
¼-3/8 |
3000 |
3000 |
2400 |
1500 |
1000 |
2000 |
|
1/2 |
3000 |
1500 |
1600 |
1500 |
750 |
1200 |
|
Brad-Point |
Softwood |
Hardwood |
Acrylic |
|
1/8 |
1800 |
1200 |
1500 |
|
¼ |
1800 |
1000 |
1500 |
|
3/8 |
1800 |
750 |
1500 |
|
½ |
1800 |
750 |
1000 |
|
5/8 |
1800 |
500 |
750 |
|
¾ |
1400 |
250 |
750 |
|
7/8 |
1200 |
250 |
500 |
|
1 |
1000 |
250 |
250 |
|
Forstner |
Softwood |
Hardwood |
Acrylic |
|
¼-3/8 |
2400 |
700 |
---- |
|
½-5/8 |
2400 |
500 |
250 |
|
¾-1 |
1500 |
500 |
250 |
|
1 1/8-1 ¼ |
1500 |
250 |
250 |
|
1 3/8-2 |
500 |
250 |
---- |
|
Multi-Spur |
Softwood |
Hardwood |
|
2 1/8-4 |
250 |
250 |
|
Spade |
Softwood |
Hardwood |
|
¼-1/2 |
2000 |
1500 |
|
5/8-1 |
1750 |
1500 |
|
1 1/8-1 1/2 |
1500 |
1500 |
|
Stanley Power Bore |
Softwood |
Hardwood |
|
3/8-1/2 |
1800 |
500 |
|
¾-1 |
1800 |
750 |
|
Circle Cutters |
Softwood |
Hardwood |
Acrylic |
|
1 ½-3 |
500 |
250 |
250 |
|
3 ¼-8 |
250 |
250 |
250 |
|
Countersinks |
Softwood |
Hardwood |
Acrylic |
Brass, Alum., Steel |
|
2-flute |
1400 |
1400 |
---- |
---- |
|
5-flute |
1000 |
750 |
750 |
250 |