Material Material | Hide |
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Component Component |
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![]() | Gear |
Gear Type Gear Type |
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![]() | Worm |
Pitch Diameter Pitch Diameter |
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Bore Type Bore Type |
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![]() | Round |
OD OD |
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Hub Diameter Hub Diameter |
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For Thread Direction For Thread Direction |
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Hub Material Hub Material |
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Teeth Fabrication Teeth Fabrication |
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Teeth Heat Treatment Teeth Heat Treatment |
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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.
Cast iron gears are strong and durable.
For technical drawings and 3-D models, click on a part number.
Hub | |||||||||||||||||
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Pitch | Speed Ratio | Number of Teeth | Pressure Angle | Pitch Dia. | For Number of Thread Starts | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Dia. | Wd. | Material | For Thread Direction | Teeth Heat Treatment | Teeth Fabrication | Each | |
Round Bore—Cast Iron | |||||||||||||||||
12 | 18:1 | 18 | 14 1/2° | 1.5" | 1 | 1.69" | 1/2" | 1.125" | 1/2" | 1.25" | 0.625" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
12 | 20:1 | 20 | 14 1/2° | 1.67" | 1 | 1.85" | 1/2" | 1.125" | 1/2" | 1.25" | 0.625" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
12 | 30:1 | 30 | 14 1/2° | 2.5" | 1 | 2.69" | 1/2" | 1.125" | 1/2" | 1.25" | 0.625" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
12 | 40:1 | 40 | 14 1/2° | 3.33" | 1 | 3.52" | 1/2" | 1.25" | 5/8" | 1.5" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
12 | 60:1 | 60 | 14 1/2° | 5" | 1 | 5.19" | 1/2" | 1.25" | 5/8" | 1.75" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
10 | 20:1 | 20 | 14 1/2° | 2" | 1 | 2.22" | 5/8" | 1.375" | 1/2" | 1.25" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
10 | 30:1 | 30 | 14 1/2° | 3" | 1 | 3.22" | 5/8" | 1.375" | 5/8" | 1.75" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
10 | 40:1 | 40 | 14 1/2° | 4" | 1 | 4.22" | 5/8" | 1.375" | 5/8" | 1.75" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
10 | 50:1 | 50 | 14 1/2° | 5" | 1 | 5.22" | 5/8" | 1.375" | 3/4" | 2" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
10 | 100:1 | 100 | 14 1/2° | 10" | 1 | 10.22" | 5/8" | 1.375" | 3/4" | 2.5" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
8 | 20:1 | 20 | 14 1/2° | 2.5" | 1 | 2.78" | 3/4" | 1.5" | 3/4" | 1.75" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
8 | 30:1 | 30 | 14 1/2° | 3.75" | 1 | 4.03" | 3/4" | 1.5" | 3/4" | 1.75" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
8 | 40:1 | 40 | 14 1/2° | 5" | 1 | 5.28" | 3/4" | 1.625" | 1" | 2.375" | 0.875" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
6 | 20:1 | 20 | 14 1/2° | 3.33" | 1 | 3.71" | 1" | 1.875" | 3/4" | 1.875" | 0.875" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
6 | 24:1 | 24 | 14 1/2° | 4" | 1 | 4.37" | 1" | 1.875" | 3/4" | 1.875" | 0.875" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
6 | 30:1 | 30 | 14 1/2° | 5" | 1 | 5.37" | 1" | 1.875" | 7/8" | 2.25" | 0.875" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
6 | 40:1 | 40 | 14 1/2° | 6.67" | 1 | 7.04" | 1" | 1.875" | 1" | 2.5" | 0.875" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
6 | 72:1 | 72 | 14 1/2° | 12" | 1 | 12.37" | 1" | 2.25" | 1 1/4" | 3" | 1.25" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
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—Cast Iron | |||||||||||||||||
1 | 120:1 | 120 | 20° | 120 | 1 | 123 | 10 | 20 | 10 | 40 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
1 | 60:1 | 60 | 20° | 60 | 1 | 63 | 10 | 20 | 10 | 30 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1 | 100:1 | 100 | 20° | 100 | 1 | 103 | 10 | 20 | 10 | 40 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1 | 80:1 | 80 | 20° | 80 | 1 | 83 | 10 | 20 | 10 | 35 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 30:1 | 30 | 20° | 45 | 1 | 49.5 | 12 | 22 | 10 | 30 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 40:1 | 40 | 20° | 60 | 1 | 64.5 | 12 | 22 | 12 | 30 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 50:1 | 50 | 20° | 75 | 1 | 79.5 | 14 | 24 | 12 | 40 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 60:1 | 60 | 20° | 90 | 1 | 94.5 | 14 | 24 | 12 | 40 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 80:1 | 80 | 20° | 120 | 1 | 124.4 | 14 | 24 | 15 | 50 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 25:1 | 50 | 14 1/2° | 101 | 2 | 106 | 22 | 35 | 12 | 48 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 25:1 | 50 | 14 1/2° | 101 | 2 | 106 | 22 | 35 | 12 | 48 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 15:1 | 30 | 14 1/2° | 61 | 2 | 66 | 22 | 35 | 12 | 40 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 15:1 | 30 | 14 1/2° | 61 | 2 | 66 | 22 | 35 | 12 | 40 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 20:1 | 20 | 14 1/2° | 40 | 1 | 46 | 22 | 35 | 12 | 33 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 20:1 | 20 | 14 1/2° | 40 | 1 | 46 | 22 | 35 | 12 | 33 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 30:1 | 30 | 14 1/2° | 60 | 1 | 66 | 22 | 35 | 12 | 40 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 30:1 | 30 | 14 1/2° | 60 | 1 | 66 | 22 | 35 | 12 | 40 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 40:1 | 40 | 14 1/2° | 80 | 1 | 86 | 22 | 35 | 12 | 45 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 40:1 | 40 | 14 1/2° | 80 | 1 | 86 | 22 | 35 | 12 | 45 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 50:1 | 50 | 14 1/2° | 100 | 1 | 106 | 22 | 35 | 12 | 48 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 50:1 | 50 | 14 1/2° | 100 | 1 | 106 | 22 | 35 | 12 | 48 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 60:1 | 60 | 14 1/2° | 120 | 1 | 126 | 22 | 35 | 12 | 60 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 60:1 | 60 | 14 1/2° | 120 | 1 | 126 | 22 | 35 | 12 | 60 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 10:1 | 20 | 14 1/2° | 40 | 2 | 46 | 22 | 35 | 12 | 33 | 13 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2 | 10:1 | 20 | 14 1/2° | 40 | 2 | 46 | 22 | 35 | 12 | 33 | 13 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 25:1 | 50 | 20° | 126 | 2 | 132.5 | 22 | 36 | 15 | 50 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 25:1 | 50 | 20° | 126 | 2 | 132.5 | 22 | 36 | 15 | 50 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 15:1 | 30 | 20° | 76 | 2 | 82.5 | 22 | 36 | 12 | 40 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 15:1 | 30 | 20° | 76 | 2 | 82.5 | 22 | 36 | 12 | 40 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 20:1 | 20 | 20° | 50 | 1 | 57.5 | 22 | 36 | 12 | 35 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 20:1 | 20 | 20° | 50 | 1 | 57.5 | 22 | 36 | 12 | 35 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 30:1 | 30 | 20° | 75 | 1 | 82.5 | 22 | 36 | 12 | 40 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 30:1 | 30 | 20° | 75 | 1 | 82.5 | 22 | 36 | 12 | 40 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 40:1 | 40 | 20° | 100 | 1 | 107.5 | 22 | 36 | 15 | 45 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 40:1 | 40 | 20° | 100 | 1 | 107.5 | 22 | 36 | 15 | 45 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 50:1 | 50 | 20° | 125 | 1 | 132.5 | 22 | 36 | 15 | 50 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 50:1 | 50 | 20° | 125 | 1 | 132.5 | 22 | 36 | 15 | 50 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 60:1 | 60 | 20° | 150 | 1 | 157.5 | 22 | 36 | 15 | 55 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 60:1 | 60 | 20° | 150 | 1 | 157.5 | 22 | 36 | 15 | 55 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
2.5 | 10:1 | 20 | 20° | 50 | 2 | 57.5 | 22 | 36 | 12 | 35 | 14 | Cast Iron | Left Hand | Not Hardened | Not Ground | 000000000 | 00000 |
2.5 | 10:1 | 20 | 20° | 50 | 2 | 57.5 | 22 | 36 | 12 | 35 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |