| Drill Type | Soft wood | Hard wood | Acrylic | Brass | Alu | Steel | Notes |
|---|---|---|---|---|---|---|---|
| Twist | |||||||
| 1mm-5mm | 3000 | 3000 | 2500 | 3000 | 3000 | 3000 | Lubricate drill with cutting oil when drilling steel 3mm or thicker. |
| 6mm-10mm | 3000 | 1500 | 2000 | 1200 | 2500 | 1000 | |
| 11mm-15mm | 1500 | 750 | 1500 | 750 | 1500 | 600 | |
| 16mm-25mm | 750 | 500 | N/R | 400 | 1000 | 350 | |
| Brad Point | |||||||
| 3mm | 1800 | 1200 | 1500 | N/R | N/R | N/R | Raise 6 mm and smaller bits often to clear shavings and prevent heat build up |
| 6mm | 1800 | 1000 | 1500 | N/R | N/R | N/R | |
| 10mm | 1800 | 750 | 1500 | N/R | N/R | N/R | |
| 12mm | 1800 | 750 | 1000 | N/R | N/R | N/R | |
| 15mm | 1800 | 500 | 750 | N/R | N/R | N/R | |
| 19mm | 1400 | 250 | 750 | N/R | N/R | N/R | |
| 22mm | 1200 | 250 | 500 | N/R | N/R | N/R | |
| 25mm | 1000 | 250 | 250 | N/R | N/R | N/R | |
| Forstner | |||||||
| 6mm-10mm | 2400 | 700 | N/R | N/R | N/R | N/R | Raise 6 mm - 10mm bits often to clear shavings and prevent heat build up. Make several shallow passes with larger bits; allow bit to cool between passes |
| 11mm-15mm | 2400 | 500 | 250 | N/R | N/R | N/R | |
| 16mm-25mm | 1500 | 500 | 250 | N/R | N/R | N/R | |
| 28mm-32mm | 1000 | 250 | 250 | N/R | N/R | N/R | |
| 35mm-50mm | 500 | 250 | N/R | N/R | N/R | N/R | |
| Hole Saws | |||||||
| 28mm-38mm | 500 | 350 | N/R | 250 | 250 | N/R | |
| 40mm-50mm | 500 | 250 | N/R | 150 | 250 | N/R | |
| 53mm-64mm | 500 | N/R | N/R | 150 | 250 | N/R | |
| Tank Cutter | |||||||
| 6mm-13mm | 500 | 250 | 250 | N/R | N/R | N/R | Drill one side, flip material, place centre bit in its hole and resume |
| 15mm-25mm | 250 | 250 | 250 | N/R | N/R | N/R | |
| Countersinks | |||||||
| 2 flute | 1400 | 1400 | N/R | N/R | N/R | N/R | |
| 5 flute | 1000 | 750 | 750 | 250 | 250 | 250 | |
| Plug Cutters | |||||||
| All | 1000 | 500 | N/R | N/R | N/R | N/R | Cut to full depth so bit chamfers plug |