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Gear Type Gear Type |
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 | Spur |
Pressure Angle Pressure Angle |
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Hub Diameter Hub Diameter |
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Gear Rack Shape Gear Rack Shape |
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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.
Inch Gears
Gear with Round Bore
Hub | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pitch | Number of Teeth | Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Material | Dia. | Wd. | Each | |
Round Bore | |||||||||||
| 64 | 16 | 0.25" | 0.28" | 1/8" | 0.315" | 1/8" | Brass | 0.19" | 0.19" | 0000000 | 000000 |
| 64 | 24 | 0.375" | 0.41" | 1/8" | 0.315" | 1/8" | Brass | 0.28" | 0.19" | 0000000 | 00000 |
| 64 | 28 | 0.438" | 0.47" | 1/8" | 0.315" | 1/8" | Brass | 0.34" | 0.19" | 0000000 | 00000 |
| 48 | 12 | 0.25" | 0.29" | 1/8" | 0.315" | 1/8" | Brass | 0.18" | 0.19" | 0000000 | 00000 |
| 48 | 15 | 0.312" | 0.35" | 1/8" | 0.315" | 1/8" | Brass | 0.22" | 0.19" | 0000000 | 00000 |
| 48 | 18 | 0.375" | 0.42" | 1/8" | 0.315" | 1/8" | Brass | 0.28" | 0.19" | 0000000 | 00000 |
| 48 | 24 | 0.5" | 0.54" | 1/8" | 0.375" | 3/16" | Brass | 0.38" | 0.25" | 0000000 | 00000 |
| 48 | 36 | 0.75" | 0.79" | 1/8" | 0.375" | 3/16" | Brass | 0.5" | 0.25" | 0000000 | 00000 |
| 48 | 48 | 1" | 1.04" | 1/8" | 0.375" | 1/4" | Brass | 0.63" | 0.25" | 0000000 | 00000 |
| 32 | 12 | 0.375" | 0.44" | 3/16" | 0.438" | 1/8" | Brass | 0.28" | 0.25" | 0000000 | 00000 |
| 32 | 14 | 0.438" | 0.5" | 3/16" | 0.438" | 1/8" | Brass | 0.34" | 0.25" | 0000000 | 00000 |
| 32 | 16 | 0.5" | 0.56" | 3/16" | 0.438" | 3/16" | Brass | 0.4" | 0.25" | 0000000 | 00000 |
| 32 | 20 | 0.625" | 0.69" | 3/16" | 0.438" | 3/16" | Brass | 0.47" | 0.25" | 0000000 | 00000 |
| 32 | 24 | 0.75" | 0.81" | 3/16" | 0.438" | 3/16" | Brass | 0.53" | 0.25" | 0000000 | 00000 |
| 32 | 28 | 0.875" | 0.94" | 3/16" | 0.438" | 3/16" | Brass | 0.59" | 0.25" | 0000000 | 00000 |
| 32 | 36 | 1.125" | 1.19" | 3/16" | 0.438" | 1/4" | Brass | 0.72" | 0.25" | 0000000 | 00000 |
| 32 | 40 | 1.25" | 1.31" | 3/16" | 0.438" | 1/4" | Brass | 0.72" | 0.25" | 0000000 | 00000 |
| 32 | 48 | 1.5" | 1.56" | 3/16" | 0.438" | 1/4" | Brass | 0.78" | 0.25" | 0000000 | 00000 |
| 24 | 12 | 0.5" | 0.58" | 1/4" | 0.5" | 3/16" | Brass | 0.38" | 0.25" | 0000000 | 00000 |
| 24 | 15 | 0.625" | 0.71" | 1/4" | 0.5" | 3/16" | Brass | 0.5" | 0.25" | 0000000 | 00000 |
| 24 | 18 | 0.75" | 0.83" | 1/4" | 0.5" | 3/16" | Brass | 0.54" | 0.25" | 0000000 | 00000 |
| 24 | 21 | 0.875" | 0.96" | 1/4" | 0.5" | 3/16" | Brass | 0.6" | 0.25" | 0000000 | 00000 |
| 24 | 36 | 1.5" | 1.58" | 1/4" | 0.5" | 1/4" | Brass | 0.79" | 0.25" | 0000000 | 00000 |
| 24 | 48 | 2" | 2.08" | 1/4" | 0.56" | 5/16" | Brass | 0.92" | 0.31" | 0000000 | 00000 |
Metric Gears
Gear with Round Bore
Gear with Round Bore and Set Screw
Gear with Keyed Bore and Set Screw
Hub | Keyway | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Module | Number of Teeth | Pitch Dia., mm | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Material | Dia., mm | Wd., mm | Set Screw Thread Size | Wd., mm | Dp., mm | Each | |
Round Bore | ||||||||||||||
| 0.5 | 20 | 10 | 11 | 3 | 10 | 3 | Brass | 8 | 7 | __ | __ | __ | 00000000 | 000000 |
| 0.5 | 25 | 12.5 | 13 | 3 | 10 | 3 | Brass | 11 | 7 | __ | __ | __ | 00000000 | 00000 |
| 0.5 | 30 | 15 | 16 | 3 | 10 | 3 | Brass | 13 | 7 | __ | __ | __ | 00000000 | 00000 |
| 0.5 | 40 | 20 | 21 | 3 | 10 | 3 | Brass | 17 | 7 | __ | __ | __ | 00000000 | 00000 |
| 0.8 | 20 | 16 | 17.6 | 4 | 12 | 5 | Brass | 13 | 8 | __ | __ | __ | 00000000 | 00000 |
| 0.8 | 25 | 20 | 21.6 | 4 | 12 | 5 | Brass | 17 | 8 | __ | __ | __ | 00000000 | 00000 |
| 0.8 | 30 | 24 | 25.6 | 4 | 12 | 5 | Brass | 20 | 8 | __ | __ | __ | 00000000 | 00000 |
| 0.8 | 40 | 32 | 33.6 | 4 | 12 | 5 | Brass | 20 | 8 | __ | __ | __ | 00000000 | 00000 |
Round Bore with Set Screw | ||||||||||||||
| 0.5 | 15 | 7.5 | 8.5 | 3 | 14 | 3 | Brass | 8.5 | 11 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 16 | 8 | 9 | 3 | 14 | 3 | Brass | 9 | 11 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 17 | 8.5 | 9.5 | 3 | 14 | 3 | Brass | 9.5 | 11 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 19 | 9.5 | 10.5 | 3 | 14 | 3 | Brass | 10.5 | 11 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 20 | 10 | 11 | 3 | 14 | 3 | Brass | 11 | 11 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 21 | 10.5 | 11.5 | 3 | 14 | 3 | Brass | 11.5 | 11 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 22 | 11 | 12 | 3 | 10 | 3 | Brass | 9 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 23 | 11.5 | 12 | 3 | 10 | 3 | Brass | 9 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 24 | 12 | 13 | 3 | 10 | 3 | Brass | 10 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 24 | 12 | 13 | 3 | 10 | 4 | Brass | 10 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 25 | 12.5 | 13 | 3 | 10 | 3 | Brass | 10 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 25 | 12.5 | 13 | 3 | 10 | 4 | Brass | 10 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 29 | 14.5 | 15 | 3 | 10 | 3 | Brass | 12 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 30 | 15 | 16 | 3 | 10 | 3 | Brass | 12 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 30 | 15 | 16 | 3 | 10 | 3 | Brass | 12 | 7 | M4 | __ | __ | 00000000 | 00000 |
| 0.5 | 30 | 15 | 16 | 3 | 10 | 4 | Brass | 12 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 32 | 16 | 17 | 3 | 10 | 3 | Brass | 14 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 34 | 17 | 18 | 3 | 10 | 3 | Brass | 15 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 35 | 17.5 | 18 | 3 | 10 | 3 | Brass | 15 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 36 | 18 | 19 | 3 | 10 | 3 | Brass | 16 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 38 | 19 | 20 | 3 | 10 | 3 | Brass | 16 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 40 | 20 | 21 | 3 | 10 | 3 | Brass | 18 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 50 | 25 | 26 | 3 | 10 | 3 | Brass | 22 | 7 | M3 | __ | __ | 00000000 | 00000 |
| 0.5 | 70 | 35 | 36 | 3 | 10 | 3 | Brass | 28 | 7 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 17 | 13.6 | 15.2 | 4 | 12 | 4 | Brass | 10 | 8 | M3 | __ | __ | 00000000 | 00000 |
| 0.8 | 18 | 14.4 | 16 | 4 | 12 | 4 | Brass | 10 | 8 | M3 | __ | __ | 00000000 | 00000 |
| 0.8 | 19 | 15.2 | 16.8 | 4 | 12 | 4 | Brass | 12 | 8 | M3 | __ | __ | 00000000 | 00000 |
| 0.8 | 21 | 16.8 | 18.4 | 4 | 12 | 5 | Brass | 14 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 23 | 18.4 | 20 | 4 | 12 | 5 | Brass | 15 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 24 | 19.2 | 20.8 | 4 | 12 | 4 | Brass | 16 | 8 | M3 | __ | __ | 00000000 | 00000 |
| 0.8 | 24 | 19.2 | 20.8 | 4 | 12 | 5 | Brass | 16 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 25 | 20 | 21.6 | 4 | 12 | 4 | Brass | 16 | 8 | M3 | __ | __ | 00000000 | 00000 |
| 0.8 | 25 | 20 | 21.6 | 4 | 12 | 5 | Brass | 16 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 26 | 20.8 | 22.4 | 4 | 12 | 5 | Brass | 18 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 27 | 21.6 | 23.2 | 4 | 12 | 5 | Brass | 8 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 29 | 23.2 | 24.8 | 4 | 12 | 5 | Brass | 20 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 30 | 24 | 25.6 | 4 | 12 | 4 | Brass | 20 | 8 | M3 | __ | __ | 00000000 | 00000 |
| 0.8 | 30 | 24 | 25.6 | 4 | 12 | 5 | Brass | 20 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 30 | 24 | 25.6 | 4 | 12 | 6 | Brass | 20 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 32 | 25.6 | 27.2 | 4 | 12 | 5 | Brass | 22 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 34 | 27.2 | 28.8 | 4 | 12 | 5 | Brass | 22 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 35 | 28 | 29.6 | 4 | 12 | 5 | Brass | 25 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 36 | 28.8 | 30.4 | 4 | 12 | 5 | Brass | 25 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 38 | 30.4 | 32 | 4 | 12 | 5 | Brass | 25 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 40 | 32 | 33.6 | 4 | 12 | 5 | Brass | 28 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 40 | 32 | 33.6 | 4 | 12 | 6 | Brass | 28 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 50 | 40 | 41.6 | 4 | 12 | 6 | Brass | 28 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 0.8 | 60 | 48 | 49.6 | 4 | 12 | 5 | Brass | 28 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 16 | 16 | 18 | 6 | 21 | 5 | Brass | 12 | 15 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 17 | 17 | 19 | 6 | 14 | 6 | Brass | 14 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 18 | 18 | 20 | 6 | 14 | 6 | Brass | 15 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 19 | 19 | 21 | 6 | 14 | 6 | Brass | 16 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 20 | 20 | 22 | 6 | 14 | 6 | Brass | 16 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 21 | 21 | 23 | 6 | 14 | 6 | Brass | 18 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 23 | 23 | 25 | 6 | 14 | 6 | Brass | 20 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 24 | 24 | 26 | 6 | 14 | 5 | Brass | 20 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 24 | 24 | 26 | 6 | 14 | 8 | Brass | 20 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 25 | 25 | 27 | 6 | 14 | 6 | Brass | 22 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 25 | 25 | 27 | 6 | 14 | 8 | Brass | 22 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 26 | 26 | 28 | 6 | 14 | 6 | Brass | 22 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 26 | 26 | 28 | 6 | 14 | 8 | Brass | 22 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 27 | 27 | 29 | 6 | 14 | 6 | Brass | 22 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 29 | 29 | 31 | 6 | 14 | 8 | Brass | 25 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 30 | 30 | 32 | 6 | 14 | 5 | Brass | 25 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 30 | 30 | 32 | 6 | 14 | 6 | Brass | 25 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 30 | 30 | 32 | 6 | 14 | 8 | Brass | 25 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 32 | 32 | 34 | 6 | 14 | 5 | Brass | 28 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 32 | 32 | 34 | 6 | 14 | 6 | Brass | 28 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 32 | 32 | 34 | 6 | 14 | 8 | Brass | 28 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 34 | 34 | 36 | 6 | 14 | 8 | Brass | 28 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 35 | 35 | 37 | 6 | 14 | 8 | Brass | 28 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 36 | 36 | 38 | 6 | 14 | 8 | Brass | 28 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 38 | 38 | 40 | 6 | 14 | 8 | Brass | 28 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 40 | 40 | 42 | 6 | 14 | 6 | Brass | 28 | 8 | M4 | __ | __ | 00000000 | 00000 |
| 1 | 40 | 40 | 42 | 6 | 14 | 8 | Brass | 28 | 8 | M5 | __ | __ | 00000000 | 00000 |
| 1 | 50 | 50 | 52 | 6 | 14 | 8 | Brass | 28 | 8 | M5 | __ | __ | 00000000 | 00000 |
Keyed Bore with Set Screw | ||||||||||||||
| 1 | 32 | 32 | 34 | 6 | 14 | 10 | Brass | 28 | 8 | M4 | 4 | 1.8 | 00000000 | 00000 |
| 1 | 35 | 35 | 37 | 6 | 14 | 10 | Brass | 28 | 8 | M4 | 4 | 1.8 | 00000000 | 00000 |
| 1 | 36 | 36 | 38 | 6 | 14 | 10 | Brass | 28 | 8 | M4 | 4 | 1.8 | 00000000 | 00000 |
| 1 | 40 | 40 | 42 | 6 | 14 | 10 | Brass | 28 | 8 | M4 | 4 | 1.8 | 00000000 | 00000 |
Inch Internal Gears
| Pitch | Number of Teeth | Pitch Dia. | OD | ID | Face Wd. | Material | Each | |
| 32 | 48 | 1.5" | 2" | 1.461" | 3/16" | Brass | 000000 | 0000000 |
| 32 | 64 | 2" | 2.75" | 1.961" | 3/16" | Brass | 000000 | 000000 |
| 32 | 96 | 3" | 3.75" | 2.961" | 3/16" | Brass | 000000 | 000000 |
| 32 | 128 | 4" | 4.75" | 3.961" | 3/16" | Brass | 000000 | 000000 |
| 24 | 36 | 1.5" | 2.25" | 1.45" | 1/4" | Brass | 000000 | 000000 |
| 24 | 48 | 2" | 2.75" | 1.95" | 1/4" | Brass | 000000 | 000000 |
| 24 | 72 | 3" | 3.75" | 2.95" | 1/4" | Brass | 000000 | 000000 |
