Component Component |
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![]() | Gear |
System of Measurement System of Measurement |
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Gear Type Gear Type |
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![]() | Worm |
Material Material | Show |
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Material Material | Hide |
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Pressure Angle Pressure Angle |
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Hub Material Hub Material |
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Pitch Diameter Pitch Diameter |
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For Thread Direction For Thread Direction |
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OD OD |
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Hub Diameter Hub Diameter |
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Teeth Heat Treatment Teeth Heat Treatment |
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Teeth Fabrication Teeth Fabrication |
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Bore Type Bore Type |
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![]() | Round |
More
Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle. They transmit motion from worm to gear and cannot be reversed. For gears and worms to mesh correctly, they must have the same pressure angle and pitch/module. These worms are compatible with plastic worm gears.
Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.
Aluminum-bronze gears have excellent wear resistance.
For technical drawings and 3-D models, click on a part number.
Hub | |||||||||||||||||
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Module | Speed Ratio | Number of Teeth | Pressure Angle | Pitch Dia., mm | For Number of Thread Starts | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Dia., mm | Wd., mm | Material | For Thread Direction | Teeth Heat Treatment | Teeth Fabrication | Each | |
Round Bore—Aluminum-Bronze | |||||||||||||||||
0.5 | 15:1 | 30 | 20° | 15 | 2 | 16 | 5 | 12 | 4 | 12 | 7 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
0.5 | 20:1 | 20 | 20° | 10 | 1 | 11 | 5 | 12 | 4 | 9 | 7 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.5 | 30:1 | 30 | 20° | 15 | 1 | 16 | 5 | 12 | 4 | 12 | 7 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.5 | 40:1 | 40 | 20° | 20 | 1 | 21 | 5 | 12 | 5 | 15 | 7 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.5 | 50:1 | 50 | 20° | 25 | 1 | 26 | 5 | 12 | 5 | 20 | 7 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.5 | 60:1 | 60 | 20° | 30 | 1 | 31 | 5 | 12 | 5 | 25 | 7 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.5 | 10:1 | 20 | 20° | 10 | 2 | 11 | 5 | 12 | 4 | 9 | 7 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.8 | 15:1 | 30 | 20° | 24 | 2 | 25.6 | 8 | 16 | 5 | 18 | 8 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.8 | 20:1 | 20 | 20° | 16 | 1 | 17.6 | 8 | 16 | 5 | 12 | 8 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.8 | 30:1 | 30 | 20° | 24 | 1 | 25.6 | 8 | 16 | 5 | 18 | 8 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.8 | 40:1 | 40 | 20° | 32 | 1 | 33.6 | 8 | 16 | 6 | 20 | 8 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.8 | 50:1 | 50 | 20° | 40 | 1 | 41.6 | 8 | 16 | 8 | 25 | 8 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.8 | 60:1 | 60 | 20° | 48 | 1 | 49.6 | 8 | 16 | 8 | 25 | 8 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
0.8 | 10:1 | 20 | 20° | 16 | 2 | 17.6 | 8 | 16 | 5 | 12 | 8 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1 | 15:1 | 30 | 20° | 30 | 2 | 33 | 10 | 20 | 6 | 20 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1 | 20:1 | 20 | 20° | 20 | 1 | 23 | 10 | 20 | 6 | 16 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1 | 30:1 | 30 | 20° | 30 | 1 | 33 | 10 | 20 | 6 | 20 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1 | 40:1 | 40 | 20° | 40 | 1 | 43 | 10 | 20 | 8 | 26 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1 | 50:1 | 50 | 20° | 50 | 1 | 53 | 10 | 20 | 8 | 30 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
1 | 60:1 | 60 | 20° | 60 | 1 | 63 | 10 | 20 | 10 | 35 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
1 | 10:1 | 20 | 20° | 20 | 2 | 23 | 10 | 20 | 6 | 16 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 15:1 | 30 | 20° | 45 | 2 | 49.5 | 14 | 24 | 10 | 30 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 20:1 | 20 | 20° | 30 | 1 | 34.5 | 14 | 24 | 8 | 22 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 30:1 | 30 | 20° | 45 | 1 | 49.5 | 14 | 24 | 10 | 30 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 40:1 | 40 | 20° | 60 | 1 | 64.5 | 14 | 24 | 12 | 35 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
1.5 | 50:1 | 50 | 20° | 75 | 1 | 79.5 | 14 | 24 | 12 | 45 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
1.5 | 60:1 | 60 | 20° | 90 | 1 | 94.5 | 14 | 24 | 12 | 50 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
1.5 | 10:1 | 20 | 20° | 30 | 2 | 34.5 | 14 | 24 | 8 | 22 | 10 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 36:1 | 36 | 20° | 72 | 1 | 78 | 18 | 35 | 12 | 40 | 12 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 25:1 | 25 | 20° | 50 | 1 | 54 | 18 | 35 | 12 | 35 | 12 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 48:1 | 48 | 20° | 96 | 1 | 104 | 18 | 35 | 12 | 50 | 12 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 15:1 | 30 | 20° | 60 | 2 | 64 | 18 | 35 | 12 | 38 | 12 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 15:1 | 30 | 20° | 60 | 2 | 66 | 18 | 33 | 12 | 40 | 15 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 20:1 | 20 | 20° | 40 | 1 | 44 | 18 | 35 | 12 | 32 | 12 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 20:1 | 20 | 20° | 40 | 1 | 46 | 18 | 33 | 12 | 33 | 15 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 30:1 | 30 | 20° | 60 | 1 | 64 | 18 | 35 | 12 | 38 | 12 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 30:1 | 30 | 20° | 60 | 1 | 66 | 18 | 33 | 12 | 40 | 15 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 40:1 | 40 | 20° | 80 | 1 | 84 | 18 | 35 | 12 | 45 | 12 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 40:1 | 40 | 20° | 80 | 1 | 86 | 18 | 33 | 12 | 45 | 15 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 50:1 | 50 | 20° | 100 | 1 | 104 | 18 | 35 | 12 | 50 | 12 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 50:1 | 50 | 20° | 100 | 1 | 106 | 18 | 33 | 12 | 50 | 15 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 60:1 | 60 | 20° | 120 | 1 | 124 | 18 | 35 | 12 | 50 | 12 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 60:1 | 60 | 20° | 120 | 1 | 126 | 18 | 33 | 12 | 55 | 15 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 10:1 | 20 | 20° | 40 | 2 | 44 | 18 | 35 | 12 | 32 | 12 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2 | 10:1 | 20 | 20° | 40 | 2 | 46 | 18 | 33 | 12 | 33 | 15 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 15:1 | 30 | 20° | 75 | 2 | 82.5 | 20 | 34 | 12 | 40 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 20:1 | 20 | 20° | 50 | 1 | 57.5 | 20 | 34 | 12 | 35 | 14 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 30:1 | 30 | 20° | 75 | 1 | 82.5 | 20 | 34 | 12 | 40 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 40:1 | 40 | 20° | 100 | 1 | 107.5 | 20 | 34 | 15 | 45 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 50:1 | 50 | 20° | 125 | 1 | 132.5 | 20 | 34 | 15 | 55 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 60:1 | 60 | 20° | 150 | 1 | 157.5 | 20 | 34 | 15 | 60 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 10:1 | 20 | 20° | 50 | 2 | 57.5 | 20 | 34 | 12 | 35 | 14 | Aluminum-Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |