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Surface Feet Per Minute (SFM) to Revolutions Per Minute (RPM)
Conversion Chart:
FORMULA:
The speeds shown are given in Surface Feet Per Minute (SFM) or Surface Meters Per Minute (m/min), measured at the periphery of thedrill. To calculate thedrill revolutions per minute (RPM) from the surface speeds, the following formulae should be used, where D=diameter of drill
SFM = RPM x DIAMETER x 0.262
RPM = (SFM x 3.82) divided by DIAMETER
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Surface Meters Per Minute (m/min) to Revolutions Per Minute (RPM)
Conversion Chart:
FORMULA:
The speeds shown are given in Surface Feet Per Minute (SFM) or Surface Meters Per Minute (m/min), measured at the periphery of thedrill. To calculate thedrill revolutions per minute (RPM) from the surface speeds, the following formulae should be used, where D=diameter of drill
m/min = 3.142 x DIAMETER x RPM dived by 1000
RPM = (1000 x m/min) divided by 3.142 x DIAMETER
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The Tap & Die Co, London
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