shop math

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