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TO FIND  
RPM 3.82 x SFM / DIA.
SFM RPM x DIA. / 3.82
IPM IPT x No. TEETH x RPM
IPT IPM / (No. TEETH x RPM)
IPR IPM / RPM
CIM IPM x WOC x DOC
HP CIM x UHP
   
THREADS                                 
PD MD + RD / 2
RD MD - P
MR MD + 3(BW) - (1.5155P)
BW .57735P
P 1 / TPI
   
RPM = REVOLUTIONS PER MINUTE
SFM = SURFACE FEET PER MINUTE
IPM = INCHES PER MINUTE
IPT = INCHES PER TOOTH
IPR = INCHES PER REVOLUTION
CIM = CUBIC INCHES PER MINUTE
HP = HORSEPOWER
PD = PITCH DIAMETER
RD = ROOT DIAMETER
MR = MICROMETER READING
MD = MAJOR DIAMETER
BW = BEST WIRE
WOC = WIDTH OF CUT
DOC = DEPTH OF CUT
P = PITCH
TPI = THREADS PER INCH
UHP = UNIT HORSEPOWER
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 Last Published 3/27/15