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Plastic 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. 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/module.
Acetal gears are best suited for use in light duty machines or for prototyping.
Nylon gears can be operated without lubrication, so they’re commonly used in food-processing machines.
Acetal gear racks absorb less water than nylon racks, so they’re less likely to swell.
Nylon gear racks are lightweight and can be used without lubrication.
For technical drawings and 3-D models, click on a part number.
Inch Gears
Round 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 | 18 | 3/8" | 0.42" | 1/8" | 0.375" | 5/32" | Acetal Plastic | Molded | White | 0.313" | 0.25" | 0000000 | 00000 |
| 48 | 24 | 1/2" | 0.54" | 1/8" | 0.375" | 5/32" | Acetal Plastic | Molded | White | 0.406" | 0.25" | 0000000 | 0000 |
| 48 | 36 | 3/4" | 0.79" | 1/8" | 0.375" | 3/16" | Acetal Plastic | Molded | White | 0.547" | 0.25" | 0000000 | 0000 |
| 48 | 48 | 1" | 1.04" | 1/8" | 0.375" | 1/4" | Acetal Plastic | Molded | White | 0.609" | 0.25" | 0000000 | 0000 |
| 48 | 60 | 1 1/4" | 1.29" | 1/8" | 0.375" | 1/4" | Acetal Plastic | Molded | White | 0.609" | 0.25" | 0000000 | 0000 |
| 48 | 96 | 2" | 2.04" | 1/8" | 0.375" | 1/4" | Acetal Plastic | Molded | White | 0.609" | 0.25" | 0000000 | 0000 |
| 32 | 12 | 3/8" | 0.44" | 3/16" | 0.5" | 5/32" | Acetal Plastic | Molded | White | 0.281" | 0.313" | 0000000 | 0000 |
| 32 | 24 | 3/4" | 0.81" | 3/16" | 0.5" | 3/16" | Acetal Plastic | Molded | White | 0.5" | 0.313" | 0000000 | 0000 |
| 32 | 32 | 1" | 1.06" | 3/16" | 0.5" | 1/4" | Acetal Plastic | Molded | White | 0.625" | 0.313" | 0000000 | 0000 |
| 32 | 36 | 1 1/8" | 1.19" | 3/16" | 0.5" | 1/4" | Acetal Plastic | Molded | White | 0.609" | 0.313" | 0000000 | 0000 |
| 32 | 48 | 1 1/2" | 1.56" | 3/16" | 0.5" | 1/4" | Acetal Plastic | Molded | White | 0.625" | 0.313" | 0000000 | 0000 |
| 32 | 96 | 3" | 3.06" | 3/16" | 0.5" | 5/16" | Acetal Plastic | Molded | White | 0.813" | 0.313" | 0000000 | 0000 |
| 24 | 12 | 1/2" | 0.54" | 1/4" | 0.563" | 3/16" | Acetal Plastic | Molded | White | 0.375" | 0.313" | 000000 | 0000 |
| 24 | 18 | 3/4" | 0.83" | 1/4" | 0.563" | 3/16" | Acetal Plastic | Molded | White | 0.547" | 0.313" | 000000 | 0000 |
| 24 | 24 | 1" | 1.08" | 1/4" | 0.563" | 1/4" | Acetal Plastic | Molded | White | 0.625" | 0.313" | 000000 | 0000 |
| 24 | 36 | 1 1/2" | 1.58" | 1/4" | 0.563" | 1/4" | Acetal Plastic | Molded | White | 0.625" | 0.313" | 0000000 | 0000 |
| 24 | 48 | 2" | 2.08" | 1/4" | 0.563" | 5/16" | Acetal Plastic | Molded | White | 0.672" | 0.313" | 0000000 | 0000 |
| 24 | 60 | 2 1/2" | 2.58" | 1/4" | 0.563" | 5/16" | Acetal Plastic | Molded | White | 0.672" | 0.313" | 0000000 | 0000 |
| 20 | 12 | 0.6" | 0.7" | 3/8" | 0.75" | 1/4" | Acetal Plastic | Molded | White | 0.469" | 0.375" | 000000 | 0000 |
| 20 | 20 | 1" | 1.1" | 3/8" | 0.75" | 3/8" | Acetal Plastic | Molded | White | 0.734" | 0.375" | 000000 | 0000 |
| 20 | 24 | 1.2" | 1.3" | 3/8" | 0.75" | 3/8" | Acetal Plastic | Molded | White | 0.734" | 0.375" | 000000 | 0000 |
| 20 | 36 | 1.8" | 1.9" | 3/8" | 0.75" | 3/8" | Acetal Plastic | Molded | White | 0.734" | 0.375" | 000000 | 00000 |
| 20 | 40 | 2" | 2.1" | 3/8" | 0.75" | 3/8" | Acetal Plastic | Molded | White | 0.734" | 0.375" | 000000 | 0000 |
| 20 | 48 | 2.4" | 2.5" | 3/8" | 0.75" | 3/8" | Acetal Plastic | Molded | White | 0.734" | 0.375" | 000000 | 00000 |
Metric Gears
Round Bore
Hub | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Module | Number of Teeth | Gear Pitch Dia., mm | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Material | Fabrication | Color | Dia., mm | Wd., mm | Each | |
Round Bore | |||||||||||||
| 0.5 | 12 | 6 | 7 | 3 | 7 | 2 | Acetal Plastic | Molded | White | 4.5 | 4 | 0000000 | 00000 |
| 0.5 | 15 | 7.5 | 8.5 | 3 | 7 | 2 | Acetal Plastic | Molded | White | 4.5 | 4 | 00000000 | 0000 |
| 0.5 | 16 | 8 | 9 | 3 | 7 | 3 | Acetal Plastic | Molded | White | 6 | 4 | 00000000 | 0000 |
| 0.5 | 20 | 10 | 11 | 3 | 7 | 4 | Acetal Plastic | Molded | White | 8 | 4 | 00000000 | 0000 |
| 0.5 | 24 | 12 | 13 | 3 | 7 | 4 | Acetal Plastic | Molded | White | 8 | 4 | 0000000 | 0000 |
| 0.5 | 30 | 15 | 16 | 3 | 7 | 5 | Acetal Plastic | Molded | White | 10 | 4 | 00000000 | 0000 |
| 0.5 | 36 | 18 | 19 | 3 | 7 | 5 | Acetal Plastic | Molded | White | 10 | 4 | 0000000 | 0000 |
| 0.5 | 40 | 20 | 21 | 3 | 7 | 5 | Acetal Plastic | Molded | White | 12 | 4 | 00000000 | 0000 |
| 0.5 | 45 | 22.5 | 23.5 | 3 | 7 | 5 | Acetal Plastic | Molded | White | 12 | 4 | 00000000 | 0000 |
| 0.5 | 48 | 24 | 25 | 3 | 7 | 5 | Acetal Plastic | Molded | White | 12 | 4 | 0000000 | 0000 |
| 0.5 | 50 | 25 | 26 | 3 | 7 | 5 | Acetal Plastic | Molded | White | 12 | 4 | 00000000 | 0000 |
| 0.5 | 56 | 28 | 29 | 3 | 8 | 6 | Acetal Plastic | Molded | White | 14 | 5 | 00000000 | 0000 |
| 0.5 | 60 | 30 | 31 | 3 | 8 | 6 | Acetal Plastic | Molded | White | 14 | 5 | 0000000 | 0000 |
| 0.5 | 70 | 35 | 36 | 3 | 8 | 6 | Acetal Plastic | Molded | White | 14 | 5 | 00000000 | 00000 |
| 0.5 | 80 | 40 | 41 | 3 | 8 | 6 | Acetal Plastic | Molded | White | 14 | 5 | 00000000 | 00000 |
| 0.8 | 12 | 9.6 | 11.2 | 4 | 9 | 3 | Acetal Plastic | Molded | White | 6 | 5 | 00000000 | 0000 |
| 0.8 | 15 | 12 | 13.6 | 4 | 9 | 3 | Acetal Plastic | Molded | White | 6 | 5 | 00000000 | 0000 |
| 0.8 | 16 | 12.8 | 14.4 | 4 | 9 | 4 | Acetal Plastic | Molded | White | 8 | 5 | 00000000 | 0000 |
| 0.8 | 20 | 16 | 17.6 | 4 | 9 | 5 | Acetal Plastic | Molded | White | 10 | 5 | 0000000 | 0000 |
| 0.8 | 24 | 19.2 | 20.8 | 4 | 9 | 5 | Acetal Plastic | Molded | White | 10 | 5 | 00000000 | 0000 |
| 0.8 | 30 | 24 | 25.6 | 4 | 9 | 6 | Acetal Plastic | Molded | White | 12 | 5 | 0000000 | 0000 |
| 0.8 | 40 | 32 | 33.6 | 4 | 9 | 6 | Acetal Plastic | Molded | White | 12 | 5 | 0000000 | 0000 |
| 0.8 | 48 | 38.4 | 40 | 4 | 9 | 6 | Acetal Plastic | Molded | White | 14.5 | 6 | 00000000 | 00000 |
| 0.8 | 60 | 48 | 49.6 | 4 | 10 | 6 | Acetal Plastic | Molded | White | 14.5 | 6 | 0000000 | 0000 |
| 0.8 | 70 | 56 | 57.6 | 4 | 10 | 6 | Acetal Plastic | Molded | White | 15.5 | 6 | 00000000 | 00000 |
| 0.8 | 80 | 64 | 65.6 | 4 | 10 | 6 | Acetal Plastic | Molded | White | 15.5 | 6 | 0000000 | 0000 |
| 1 | 12 | 12 | 14 | 6 | 12 | 4 | Acetal Plastic | Molded | White | 8 | 6 | 00000000 | 0000 |
| 1 | 15 | 15 | 17 | 6 | 12 | 4 | Acetal Plastic | Molded | White | 8 | 6 | 0000000 | 0000 |
| 1 | 15 | 15 | 17 | 10 | 20 | 6 | Nylon Plastic | Machined | Blue | 12 | 10 | 00000000 | 00000 |
| 1 | 16 | 16 | 18 | 6 | 12 | 5 | Acetal Plastic | Molded | White | 10 | 6 | 00000000 | 0000 |
| 1 | 16 | 16 | 18 | 10 | 20 | 6 | Nylon Plastic | Machined | Blue | 12 | 10 | 00000000 | 00000 |
| 1 | 18 | 18 | 20 | 6 | 12 | 5 | Acetal Plastic | Molded | White | 10 | 6 | 00000000 | 0000 |
| 1 | 18 | 18 | 20 | 10 | 20 | 6 | Nylon Plastic | Machined | Blue | 14 | 10 | 00000000 | 00000 |
| 1 | 20 | 20 | 22 | 6 | 12 | 5 | Acetal Plastic | Molded | White | 11.7 | 6 | 0000000 | 0000 |
| 1 | 20 | 20 | 22 | 10 | 20 | 6 | Nylon Plastic | Machined | Blue | 16 | 10 | 00000000 | 00000 |
| 1 | 22 | 22 | 24 | 10 | 20 | 8 | Nylon Plastic | Machined | Blue | 18 | 10 | 00000000 | 00000 |
| 1 | 24 | 24 | 26 | 6 | 12 | 5 | Acetal Plastic | Molded | White | 11.7 | 6 | 00000000 | 0000 |
| 1 | 24 | 24 | 26 | 10 | 20 | 8 | Nylon Plastic | Machined | Blue | 20 | 10 | 00000000 | 00000 |
| 1 | 25 | 25 | 27 | 10 | 20 | 8 | Nylon Plastic | Machined | Blue | 20 | 10 | 00000000 | 00000 |
| 1 | 26 | 26 | 28 | 10 | 20 | 8 | Nylon Plastic | Machined | Blue | 20 | 10 | 00000000 | 00000 |
| 1 | 28 | 28 | 30 | 6 | 12 | 5 | Acetal Plastic | Molded | White | 11.7 | 6 | 00000000 | 00000 |
| 1 | 28 | 28 | 30 | 10 | 20 | 8 | Nylon Plastic | Machined | Blue | 22 | 10 | 00000000 | 00000 |
| 1 | 30 | 30 | 32 | 6 | 12 | 6 | Acetal Plastic | Molded | White | 14 | 6 | 0000000 | 0000 |
| 1 | 30 | 30 | 32 | 10 | 20 | 8 | Nylon Plastic | Machined | Blue | 25 | 10 | 00000000 | 00000 |
| 1 | 32 | 32 | 34 | 6 | 12 | 6 | Acetal Plastic | Molded | White | 14 | 6 | 00000000 | 00000 |
| 1 | 32 | 32 | 34 | 10 | 20 | 8 | Nylon Plastic | Machined | Blue | 26 | 10 | 00000000 | 00000 |
| 1 | 35 | 35 | 37 | 6 | 12 | 6 | Acetal Plastic | Molded | White | 14 | 6 | 00000000 | 00000 |
| 1 | 36 | 36 | 38 | 6 | 12 | 6 | Acetal Plastic | Molded | White | 14 | 6 | 00000000 | 00000 |
| 1 | 40 | 40 | 42 | 6 | 12 | 8 | Acetal Plastic | Molded | White | 16 | 6 | 00000000 | 00000 |
| 1 | 40 | 40 | 42 | 10 | 20 | 10 | Nylon Plastic | Machined | Blue | 35 | 10 | 00000000 | 00000 |
| 1 | 45 | 45 | 47 | 6 | 12 | 8 | Acetal Plastic | Molded | White | 16 | 6 | 0000000 | 00000 |
| 1 | 48 | 48 | 50 | 6 | 14 | 8 | Acetal Plastic | Molded | White | 16 | 8 | 00000000 | 00000 |
| 1 | 50 | 50 | 52 | 6 | 14 | 8 | Acetal Plastic | Molded | White | 16 | 8 | 00000000 | 00000 |
| 1 | 50 | 50 | 52 | 10 | 20 | 10 | Nylon Plastic | Machined | Blue | 35 | 10 | 00000000 | 00000 |
| 1 | 60 | 60 | 62 | 6 | 14 | 8 | Acetal Plastic | Molded | White | 18 | 8 | 0000000 | 00000 |
| 1 | 60 | 60 | 62 | 10 | 20 | 10 | Nylon Plastic | Machined | Blue | 35 | 10 | 00000000 | 00000 |
| 1 | 64 | 64 | 66 | 6 | 14 | 8 | Acetal Plastic | Molded | White | 18 | 8 | 00000000 | 00000 |
| 1 | 70 | 70 | 72 | 6 | 14 | 8 | Acetal Plastic | Molded | White | 18 | 8 | 00000000 | 00000 |
| 1 | 72 | 72 | 74 | 6 | 14 | 8 | Acetal Plastic | Molded | White | 18 | 8 | 00000000 | 00000 |
| 1 | 75 | 75 | 77 | 10 | 20 | 10 | Nylon Plastic | Machined | Blue | 40 | 10 | 00000000 | 00000 |
| 1 | 80 | 80 | 82 | 6 | 14 | 8 | Acetal Plastic | Molded | White | 18 | 8 | 00000000 | 00000 |
| 1 | 80 | 80 | 82 | 10 | 20 | 10 | Nylon Plastic | Machined | Blue | 40 | 10 | 00000000 | 00000 |
| 1 | 100 | 100 | 102 | 10 | 20 | 10 | Nylon Plastic | Machined | Blue | 40 | 10 | 00000000 | 000000 |
| 1.5 | 15 | 22.5 | 25.5 | 15 | 25 | 8 | Nylon Plastic | Machined | Blue | 18 | 10 | 00000000 | 00000 |
| 1.5 | 16 | 24 | 27 | 15 | 25 | 8 | Nylon Plastic | Machined | Blue | 20 | 10 | 00000000 | 00000 |
| 1.5 | 20 | 30 | 33 | 15 | 25 | 8 | Nylon Plastic | Machined | Blue | 24 | 10 | 00000000 | 00000 |
| 1.5 | 22 | 33 | 36 | 15 | 25 | 8 | Nylon Plastic | Machined | Blue | 26 | 10 | 00000000 | 00000 |
| 1.5 | 30 | 45 | 48 | 15 | 25 | 8 | Nylon Plastic | Machined | Blue | 38 | 10 | 00000000 | 00000 |
| 1.5 | 32 | 48 | 51 | 15 | 25 | 8 | Nylon Plastic | Machined | Blue | 40 | 10 | 00000000 | 00000 |
| 1.5 | 50 | 75 | 78 | 15 | 25 | 10 | Nylon Plastic | Machined | Blue | 45 | 10 | 00000000 | 00000 |
| 1.5 | 80 | 120 | 123 | 15 | 25 | 12 | Nylon Plastic | Machined | Blue | 55 | 10 | 00000000 | 000000 |
| 1.5 | 100 | 150 | 153 | 15 | 25 | 12 | Nylon Plastic | Machined | Blue | 60 | 10 | 00000000 | 000000 |
| 2 | 12 | 24 | 28 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 18 | 10 | 00000000 | 00000 |
| 2 | 15 | 30 | 34 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 24 | 10 | 00000000 | 00000 |
| 2 | 16 | 32 | 36 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 26 | 10 | 00000000 | 00000 |
| 2 | 18 | 36 | 40 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 30 | 10 | 00000000 | 00000 |
| 2 | 20 | 40 | 44 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 32 | 10 | 00000000 | 00000 |
| 2 | 24 | 48 | 52 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 38 | 10 | 00000000 | 00000 |
| 2 | 25 | 50 | 54 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 40 | 10 | 00000000 | 00000 |
| 2 | 28 | 56 | 60 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 45 | 10 | 00000000 | 00000 |
| 2 | 30 | 60 | 64 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 50 | 10 | 00000000 | 00000 |
Inch Gear Racks
Metric Gear Racks
| Module | Lg., mm | Pitch Ht., mm | Ht., mm | Face Wd., mm | Material | Fabrication | Color | Each | |
| 0.5 | 250 | 5.9 | 6.3 | 4 | Acetal Plastic | Molded | Gray | 0000000 | 00000 |
| 0.8 | 250 | 6.4 | 7.3 | 5 | Acetal Plastic | Molded | Gray | 0000000 | 0000 |
| 1 | 304.8 | 8 | 10 | 10 | Acetal Plastic | Molded | Gray | 0000000 | 0000 |
| 1 | 500 | 11 | 12 | 10 | Acetal Plastic | Machined | White | 0000000 | 000000 |
| 1 | 500 | 11 | 12 | 10 | Nylon Plastic | Machined | Blue | 0000000 | 000000 |
| 1.5 | 500 | 18.5 | 20 | 15 | Acetal Plastic | Machined | White | 0000000 | 000000 |
| 2 | 500 | 23 | 25 | 20 | Acetal Plastic | Machined | White | 0000000 | 000000 |
| 2 | 500 | 23 | 25 | 20 | Nylon Plastic | Machined | Blue | 0000000 | 000000 |
| 2 | 1,000 | 23 | 25 | 20 | Nylon Plastic | Machined | Blue | 0000000 | 000000 |