Material Material | Show |
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Material Material | Hide |
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Component Component |
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![]() | ![]() |
Gear | Gear Rack |
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Internal Gear |
Pitch Diameter Pitch Diameter |
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Gear Type Gear Type |
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![]() | Spur |
Pressure Angle Pressure Angle |
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OD OD |
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Hub Diameter Hub Diameter |
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Gear Rack Shape Gear Rack Shape |
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![]() | Rectangular |
More
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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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 |
Hub | Keyway | |||||||||||||
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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 |
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 |