Rule
Formula
Having
To Get
Multiply the circular pitch
Addendum
Circular pitch
by 0.3183.
Multiply the circular pitch
Working depth
Circular pitch
by 0.6366.
Multiply the circular pitch
Whole depth
Circular pitch
by 0.6866.
Clearance
Multiply the circular pitch
Circular pitch
by 0.05.
Divide 3.1416 by the
Diametral pitch
Circular pitch
circular pitch.
Divide the number of teeth
Diametral pitch
Pitch diameter and
by the pitch diameter.
number of teeth
Add pitch diameter of gear
Center distance
Pitch diameter of
(PDg) to pitch diameter of
gear pinion
pinion (PDp) and divide by 2.
Diametral pitch
Divide the number of teeth
Outside diameter and
plus 2 by the outside
number of teeth
diameter.
Divide the number of teeth
Pitch diameter
Number of teeth and
by the diametral pitch.
diametral pitch
Subtract from the outside
Pitch diameter
Outside diameter and
diameter the quotient of 2
diametral pitch
divided by the diametral
pitch.
Divide the number of teeth
Outside diameter
Number of teeth and
plus 2 by the diametral pitch.
diametral pitch
Outside diameter
Add to the pitch diameter
Pitch diameter and
diametral pitch
the quotient of 2 divided by
the diametral pitch.
Pitch diameter and
Divide the number of teeth
Outside diameter
number of teeth
plus 2 by the quotient of the
number of teeth divided by
pitch diameter.
Number of teeth
Multiply the pitch diameter
Pitch diameter and
by the diametral pitch.
diametral pitch
AIII-2