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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.
Carbon steel components have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals. They're best for high-torque machines, like lifting equipment, and heavy duty applications, such as rock crushing. Gears with teeth that are not hardened can be hardened to fit your application.
Stainless steel gears and racks resist rust in damp and 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.
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 | Teeth Heat Treatment | Dia., mm | Wd., mm | Set Screw Thread Size | Each | |
Round Bore | |||||||||||||
1 | 55 | 55 | 57 | 10 | 20 | 10 | Black-Oxide 1045 Carbon Steel | Not Hardened | 35 | 10 | __ | 00000000 | 000000 |
1.5 | 55 | 82.5 | 85 | 15 | 29 | 12 | 303 Stainless Steel | Not Hardened | 55 | 14 | __ | 00000000 | 000000 |
Round Bore with Set Screw | |||||||||||||
0.5 | 55 | 27.5 | 28 | 5 | 12 | 5 | Black-Oxide 1045 Carbon Steel | Not Hardened | 25 | 7 | M4 | 00000000 | 00000 |