System of Measurement System of Measurement |
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Module Module |
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OD OD | Show |
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OD OD | Hide |
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Material Material |
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Pressure Angle Pressure Angle |
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Worm Length Worm Length |
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Gear Pitch Diameter Gear Pitch Diameter |
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Bore Type Bore Type |
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 | Round |
Thread Direction Thread Direction |
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Set Screw Included Set Screw Included |
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Teeth Fabrication Teeth Fabrication |
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Number of Teeth Number of Teeth |
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Teeth Heat Treatment Teeth Heat Treatment |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Gears
More
Metal Gears and Gear Racks—20° Pressure Angle
The current industry standard, these 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears. Compared to plastic gears and racks, they’re better for high-load, high-speed, and heavy duty applications. Also known as spur gears.
Combine gears with different numbers of teeth to change speed and torque in your assembly. Combine a gear and rack to convert rotary motion into linear motion. To minimize your footprint, mount one or more standard gears inside of an internal gear.
For components to mesh correctly, they must have the same pressure angle and pitch/module.
Brass gears and racks are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.
For technical drawings and 3-D models, click on a part number.
Hub | ||||||||||||
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| Module | Number of Teeth | Gear Pitch Dia., mm | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Material | Dia., mm | Wd., mm | Set Screw Thread Size | Each | |
Round Bore with Set Screw | ||||||||||||
| 0.5 | 22 | 11 | 12 | 3 | 10 | 3 | Brass | 9 | 7 | M3 | 00000000 | 000000 |
Metal Worms and Worm Gears
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.
1045 carbon steel worms have rolled threads. 303 stainless steel worms won’t rust in wet environments, so they’re commonly used in food-processing plants and other areas with frequent cleaning.
For technical drawings and 3-D models, click on a part number.
| Module | Pressure Angle | Worm Lg., mm | Gear Pitch Dia., mm | OD, mm | For Shaft Dia., mm | Number of Thread Starts | Thread Direction | Teeth Heat Treatment | Teeth Fabrication | Set Screw Included | Each | |
Round Bore—Black-Oxide 1045 Carbon Steel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 20° | 18 | 11 | 12 | 5 | 1 | Right Hand | Not Hardened | Not Ground | Yes | 000000000 | 000000 |
| 0.5 | 20° | 18 | 11 | 12 | 5 | 2 | Right Hand | Not Hardened | Not Ground | Yes | 000000000 | 00000 |
Round Bore—303 Stainless Steel | ||||||||||||
| 0.5 | 20° | 18 | 11 | 12 | 5 | 1 | Right Hand | Not Hardened | Not Ground | Yes | 000000000 | 00000 |
| 0.5 | 20° | 18 | 11 | 12 | 5 | 2 | Right Hand | Not Hardened | Not Ground | Yes | 000000000 | 00000 |