Spur Gears

Tools, Calculations & References

Spur gears typically come in four configurations (not including shaft configurations, which are too numerous to categorize) (Click on image to enlarge it)

Style A Style A spur gears are flat gears with no hubs.	Style B Style B spur gears have a hub projecting from one side.
Style C Style C spur gears have a hub on each side of the face.	Web Style Web style spur gears may have no hubs, hubs on one side or a hub on each size. Hub style spur gears typically have the web configuration to reduce weight and may also contain several holes in the web section to further reduce weight.

See Spur Gear Tooth Geometry Calculations

Akron Gear
& Engineering, Inc

Spur gears from 1/2" diameter to 120" in diameter

Up to AGMA Class 12

Standard and Metric Pitches

Diametral Pitch
Circular Pitch
Module

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Spur Gear Calculators

Outside Diameter - Standard Full Depth Spur Gear:

Outside Diameter - American Standard 20˚ Stub Tooth

You have the Number Of Teeth and Diametral Pitch (DP)

Outside Diameter - Fellows Stub Teeth

You have the number of teeth and the diametral pitch