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System of Measurement System of Measurement |
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Component Component |
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![]() | Gear |
Number of Teeth Number of Teeth |
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OD OD | Show |
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OD OD | Hide |
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Gear Pitch Gear Pitch |
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Speed Ratio Speed Ratio |
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Pressure Angle Pressure Angle |
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Gear Type Gear Type |
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![]() | Worm |
Bore Type Bore Type |
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![]() | Round |
Hub Material Hub Material |
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Material Material |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Teeth Heat Treatment Teeth Heat Treatment |
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For Number of Thread Starts For Number of Thread Starts |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Teeth Fabrication Teeth Fabrication |
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About Gears
More
Metal Worms and Worm Gears

Worm and Gear Sold Separately
Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle. They transmit motion from worm to gear and cannot be reversed. For gears and worms to mesh correctly, they must have the same pressure angle and pitch/module. These worms are compatible with plastic worm gears.
Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.
Cast iron gears are strong and durable.
For technical drawings and 3-D models, click on a part number.
Inch Worm Gears

Gear


Hub | |||||||||||||||||
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Gear Pitch | Speed Ratio | Number of Teeth | Pressure Angle | Gear Pitch Dia. | For Number of Thread Starts | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Dia. | Wd. | Material | For Thread Direction | Teeth Heat Treatment | Teeth Fabrication | Each | |
Round Bore—Cast Iron | |||||||||||||||||
8 | 40:1 | 40 | 14 1/2° | 5" | 1 | 5.28" | 3/4" | 1.625" | 1" | 2.375" | 0.875" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 0000000 |