| Drill Press Speed Chart |
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| Recommended Operating Speeds (in RPMs) |
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Accessory | SOFTWOOD | HARDWOOD | ACRYLIC | BRASS | ALUMINUM | STEEL |
TWIST DRILL BITS |
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1/16 in - 3/16 in | 3000 | 3000 | 2500 | 3000 | 3000 | 3000 |
1.5 mm - 5mm | 3000 | 3000 | 2500 | 3000 | 3000 | 3000 |
1/4 in - 3/8 in | 3000 | 1500 | 2000 | 1200 | 2500 | 1000 |
6mm - 10mm | 3000 | 1500 | 2000 | 1200 | 2500 | 1000 |
7/16 in - 5/8 in | 1500 | 750 | 1500 | 750 | 1500 | 600 |
11mm - 16mm | 1500 | 750 | 1500 | 750 | 1500 | 600 |
11/16 in - 1 in. | 750 | 500 | NR | 400 | 1000 | NR |
17mm - 27mm | 750 | 500 | NR | 400 | 1000 | NR |
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1/8 in | 1800 | 1200 | 1500 | NR | NR | NR |
1/4 in | 1800 | 1000 | 1500 | NR | NR | NR |
3/8 in | 1800 | 750 | 1500 | NR | NR | NR |
1/2 in | 1800 | 750 | 1000 | NR | NR | NR |
5/8 in | 1800 | 500 | 750 | NR | NR | NR |
3/4 in | 1400 | 250 | 750 | NR | NR | NR |
7/8 in | 1200 | 250 | 500 | NR | NR | NR |
1 in | 1000 | 250 | 200 | NR | NR | NR |
FORSTNER BITS |
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1/4 in - 3/8 in | 2400 | 700 | 250 | NR | NR | NR |
1/2 in - 5/8 in | 2400 | 500 | 250 | NR | NR | NR |
3/4 in - 1 in | 1500 | 500 | 250 | NR | NR | NR |
1 1/8 in - 1 1/4 in | 1000 | 250 | 250 | NR | NR | NR |
1 3/8 in - 2 in | 500 | 250 | NR | NR | NR | NR |
SPADE BITS |
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1/4 in - 1/2 in | 2000 | 1500 | NR | NR | NR | NR |
5/8 in - 1 in | 1750 | 1500 | NR | NR | NR | NR |
1 1/8 in - 1 1/2 in | 1500 | 1000 | NR | NR | NR | NR |
SPADE BITS WITH SPURS |
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3/8 in - 1 in | 2000 | 1800 | 500 | NR | NR | NR |
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| NR - Not Recommended | |
TWIST DRILL |
| FORSTNER |
| SPADE | SPADE | |
BITS |
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BITS |
| BITS | BITS (W/SPURS) | |||
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| A14779 - | |
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| 15 |
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