Speed & Feed Charts
300 Series & PH
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!