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CALCULATORS

Surface Feet Per Minute (SFPM) = (Pi * Diameter * RPM) / 12

Diameter-inches
RPM
SFPM
=

Cutter Chip Load (CL) = Feed Rate (Inches Per Minute) / RPM / Number of Teeth

Feed Rate Inches Per Minute
RPM
Number of Teeth
Cutter Chip Load

Inch to Millimeter or Millimeter to Inch Converter ___ (.03936" = 1mm and 1" = 25.4mm)___

Inches
Millimeters

 


Machining Terms & Formulas
Terms
Formulas
IPM=Inches Per Minute
IPR x RPM = IPM
IPR=Inches Per Revolution
IPM / RPM = IPR
RPM=Revolutions Per Minute
SFM x 3.82 / D = RPM
SFM=Surface Feet Per Minute
D x RPM x .26 = SFM
D=Drill Diameter
 
 
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