About Gears
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Metal Bevel Gears
A type of miter gear where one gear (sometimes called a pinion) is smaller than the other, bevel gears provide right-angle speed reduction at speed ratios ranging from 2:1 to 5:1. All are carbon steel for strength; they're compatible with plastic bevel gears. Teeth are not hardened so you can harden them to fit your application. Hardening a gear’s teeth increases its wear resistance.
A complete set consists of a gear and pinion (sold separately). For a gear and pinion to mesh correctly, they must have the same pressure angle, pitch/module, and face width. Speed ratio is the ratio by which shaft speed is reduced when transferring motion from pinion to gear. To increase shaft speed, transfer motion from gear to pinion. Changing shaft speed also changes torque: as speed decreases, torque increases.
For technical drawings and 3-D models, click on a part number.
Hub | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Face Wd. | Gear Pitch  | Pressure Angle | Speed Ratio | Number of Teeth | Gear Pitch Dia. | OD | Overall Wd. | For Shaft Dia. | Mounting Distance (A) | Dia. | Wd. | Material | Each | |
Round Bore | ||||||||||||||
| 0.19" | 16 | 20° | 2:1 | 24 | 1 1/2" | 1.54" | 0.741" | 1/2" | 1" | 1" | 0.448" | 1144 Carbon Steel | 0000000 | 000000 |
Hub | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Face Wd. | Gear Pitch | Pressure Angle | Speed Ratio | Number of Teeth | Gear Pitch Dia. | OD | Overall Wd. | For Shaft Dia. | Mounting Distance (B) | Dia. | Wd. | Material | Each | |
Round Bore | ||||||||||||||
| 0.19" | 16 | 20° | 2:1 | 12 | 3/4" | 0.9" | 0.583" | 3/8" | 1.125" | 0.656" | 0.344" | 1144 Carbon Steel | 0000000 | 000000 |
Plastic Gears and Gear Racks—14 1/2° Pressure Angle
A former industry standard, 14½° pressure angle gears are often found on older machinery. Made of plastic, they run quieter than metal gears and have good corrosion and chemical resistance. They’re 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.
For components to mesh correctly, they must have the same pressure angle and pitch.
For technical drawings and 3-D models, click on a part number.
Round/Machinable
Bore
Hub | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gear Pitch | Number of Teeth | Gear Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Material | Fabrication | Color | Dia. | Wd. | Each | |
Round Bore | |||||||||||||
| 48 | 72 | 1 1/2" | 1.54" | 1/8" | 0.375" | 1/4" | Nylon Plastic | Molded | White | 0.625" | 0.25" | 00000000 | 000000 |