40-Tooth Module 0.5 Spur Gear

Standard 20° pressure-angle involute spur gear — free engineering reference, STL/DXF/SVG downloads, and a live customizer.

3D render of a 40-tooth module 0.5 involute spur gear, blueprint style, on white background
Teeth40
Module0.5 mm
Pressure angle20°
Pitch diameter20 mm
Outside diameter21 mm
Root diameter18.75 mm
Base diameter18.79 mm
Circular pitch1.57 mm
Addendum0.5 mm
Dedendum0.63 mm
Whole depth1.13 mm
Tooth thickness (at pitch circle)0.79 mm
Bore diameter (default)5 mm
Face width (default)3 mm
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Technical diagram of the 40-tooth module 0.5 gear tooth profile

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40T · m0.3
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40T · m1
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40T · m2
Same 40 teeth, module 2

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