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Timing Belt Pulley Design Calculator

We can form the following definitions and equations:

N = Number of teeth on pulley.

P = Pitch of Belt (distance between teeth).

Cb = Circumference of belt.

Db = Diameter of belt.

Dpo = Outer Diameter of pulley.

Dpi = Inner Diameter of pulley.

Tb = Thickness of belt, measured from tooth valley to the flat side of the belt.

Ht = Height of the tooth on the belt.

Equations:

Cb=NP

Db=Cbπ

Dpo=Db2Tb

Dpi=Dpo2Ht

Inputs