Speed & Feed Charts
COPPER ALLOYS
| Berryllium, Ni-Based |
|---|
| Rc | SFM |
|---|
| 12-22 | 200 |
| 22-32 | 130 |
| 32-37 | 60 |
- Consult Sterling Gun Drills to verify application requirements.
- High SFM will cause vibration and/or harmonics with long gun drills. Reduce RPM or ensure adequate supports are in place or use an intermediate length gun drill.
- Minimum oil/coolant pressure is 35% of the PSI values on page 2. If at minimum, reduce SFM by 35%.
- Applications suitable for our Spraymist System, reduce SFM by 35% at same feed rate listed.
- Water soluble coolant must be oil based, high "EP" at 10-12% concentration, NO SYNTHETICS!