For Additional Technical Information Please Email - customerservice@newyorktwistdrill.com
FEEDS
When reaming, feeds are usually higher than those used for drilling. Rates of feed may vary with material; a good starting point would be .0015 to .004 per flute per revolution. Too low of a feed may cause glazing, excessive wear, or chatter. Too high of feed may reduce the accuracy of the hole, it may also lower the quality of finish.
SPEEDS
The best speed is found to lie around one half of the speed used for drilling the same material. The following chart may be used as a guide.
| MATERIAL |
SPEEDS/FPM |
| Aluminum |
130-200 |
| Brass & Bronze (ordinary) |
130-200 |
| Bronze, High Tensile |
50-70 |
| Cast Iron, Chilled |
20-30 |
| Cast Iron, Hard |
50-70 |
| Cast Iron, Soft |
70-100 |
| Magnesium |
170-200 |
| Monel Metal |
25-35 |
| Plastic |
70-100 |
| Stainless Steel |
20-30 |
| Steel Alloy |
35-40 |
| 300-400 Brinell |
20-30 |
| Steel Annealed |
40-50 |
| Steel Machinery |
40-50 |
| Steel, High Tensile |
20-30 |
| Titanium |
20-30 |
