Sunday, April 2, 2017

Involute spur gear design

For the purpose of reversed engineering of spur gear with involute profile, this calculator will help you calculate the different parameters of spur gear.

In most cases, number of teeth is a number that 360 can be divided by: 3,4,5,6,9,10,12,15,18,20,24,30,36,... etc

Smaller module means smaller teeth and vise versa

Gear base tangent method (David Brown tangent comparator):

Inputs: Total number of gear teeth:

Measured span [mm]:

Number of gear teeth within the span:

Pressure angle [deg]:

Outputs: Standard module [mm]:

Addendum [mm]:

Dedendum [mm]:

Outer diameter (Addendum diameter) [mm]:

Pitch circle diameter [mm]:

Base circle diameter [mm] from which the involue profile will be drawn:

Root circle diameter [mm]:

Clearance [mm]:

Fillet radius (recommended) [mm]:

Four-points distance (for even teeth count) [mm]:

Angular pitch [deg]:

Involute angle upper limit (used in parametric equation):


Online spur gear calculator

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