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![]() | Gear |
OD OD |
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Gear Pitch Diameter Gear Pitch Diameter |
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Gear Type Gear Type |
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![]() | Worm |
Overall Width Overall Width |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Teeth Heat Treatment Teeth Heat Treatment |
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Teeth Fabrication Teeth Fabrication |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Gears
More
Metal Worms and Worm Gears

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 | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Gear Pitch | Speed Ratio | Number of Teeth | Pressure Angle | Gear 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 1/2" | 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 1/2" | 1 | 2.69" | 1/2" | 1.125" | 1/2" | 1.25" | 0.625" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
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 | 000000 |
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 | 000000 |
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 1/2" | 1 | 2.78" | 3/4" | 1.5" | 3/4" | 1.75" | 0.75" | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
8 | 30:1 | 30 | 14 1/2° | 3 3/4" | 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 | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Module | Speed Ratio | Number of Teeth | Pressure Angle | Gear 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 |
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 | 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 | 10:1 | 20 | 20° | 50 | 2 | 57.5 | 22 | 36 | 12 | 35 | 14 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
Taper-Lock Bushing-Bore V-Belt Pulleys




Mount these pulleys with a taper-lock bushing for a tight, wobble-free hold on your shaft. These pulleys transfer force from the shaft to a V-belt in a power transmission system, and also help with misalignment. Made of cast iron, these pulleys are durable and resist wear.
Depending on the taper-lock bushing you choose, the same pulley can be used with different shaft diameters.
For technical drawings and 3-D models, click on a part number.

No. of Grooves | OD, mm | Pitch Dia., mm | Wd., mm | Overall Wd., mm | Groove Dp., mm | For Bushing Style | Material | Body Type | Each | |
1 | 76.6 | 71 | 20 | 22 | 13.8 | 1108 | Cast Iron | Solid | 00000000 | 000000 |
1 | 90.6 | 85 | 20 | 25 | 13.8 | 1210 | Cast Iron | Solid | 00000000 | 00000 |
1 | 95.6 | 90 | 20 | 25 | 13.8 | 1210 | Cast Iron | Solid | 00000000 | 00000 |
1 | 100.6 | 95 | 20 | 25 | 13.8 | 1210 | Cast Iron | Solid | 00000000 | 00000 |
1 | 105.6 | 100 | 20 | 25 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
1 | 123.6 | 118 | 20 | 25 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
1 | 137.6 | 132 | 20 | 26.5 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
1 | 155.6 | 150 | 20 | 25 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
1 | 205.6 | 200 | 20 | 32 | 13.8 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
2 | 72.6 | 67 | 35 | 35 | 13.8 | 1108 | Cast Iron | Solid | 00000000 | 00000 |
2 | 76.6 | 71 | 35 | 35 | 13.8 | 1108 | Cast Iron | Solid | 00000000 | 00000 |
2 | 85.6 | 80 | 35 | 35 | 13.8 | 1210 | Cast Iron | Solid | 00000000 | 00000 |
2 | 90.6 | 85 | 35 | 35 | 13.8 | 1210 | Cast Iron | Solid | 0000000 | 00000 |
2 | 95.6 | 90 | 35 | 35 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 100.6 | 95 | 35 | 35 | 13.8 | 1610 | Cast Iron | Solid | 0000000 | 00000 |
2 | 105.6 | 100 | 35 | 35 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 111.6 | 106 | 35 | 35 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 130.6 | 125 | 35 | 35 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 137.6 | 132 | 35 | 35 | 13.8 | 2012 | Cast Iron | Solid | 0000000 | 00000 |
2 | 145.6 | 140 | 35 | 35 | 13.8 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
2 | 155.6 | 150 | 35 | 35 | 13.8 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
2 | 165.6 | 160 | 35 | 35 | 13.8 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
2 | 195.6 | 190 | 35 | 35 | 13.8 | 2012 | Cast Iron | Solid | 00000000 | 000000 |
3 | 76.6 | 71 | 50 | 50 | 13.8 | 1108 | Cast Iron | Solid | 00000000 | 00000 |
3 | 90.6 | 85 | 50 | 50 | 13.8 | 1210 | Cast Iron | Solid | 00000000 | 00000 |
3 | 95.6 | 90 | 50 | 50 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
3 | 111.6 | 106 | 50 | 50 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
3 | 123.6 | 118 | 50 | 50 | 13.8 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
3 | 130.6 | 125 | 50 | 50 | 13.8 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
3 | 145.6 | 140 | 50 | 50 | 13.8 | 2517 | Cast Iron | Solid | 00000000 | 00000 |
3 | 155.6 | 150 | 50 | 50 | 13.8 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
3 | 165.6 | 160 | 50 | 50 | 13.8 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
3 | 205.6 | 200 | 50 | 50 | 13.8 | 2517 | Cast Iron | Solid | 0000000 | 000000 |
4 | 95.6 | 90 | 65 | 65 | 13.8 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
4 | 145.6 | 140 | 65 | 65 | 13.8 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
4 | 155.6 | 150 | 65 | 65 | 13.8 | 2517 | Cast Iron | Solid | 00000000 | 000000 |

No. of Grooves | OD, mm | Pitch Dia., mm | Wd., mm | Overall Wd., mm | Groove Dp., mm | For Bushing Style | Material | Body Type | Each | |
2 | 177 | 171 | 44 | 44 | 17.5 | 2012 | Cast Iron | Solid | 00000000 | 0000000 |
2 | 187 | 180 | 44 | 45 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
2 | 207 | 200 | 44 | 45 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
2 | 287 | 280 | 44 | 45 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
3 | 167 | 160 | 63 | 63 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
3 | 187 | 180 | 63 | 63 | 17.5 | 2517 | Cast Iron | Solid | 0000000 | 000000 |
3 | 197 | 190 | 63 | 63 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
3 | 231 | 224 | 63 | 63 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
3 | 342 | 335 | 63 | 63 | 17.5 | 3020 | Cast Iron | Solid | 00000000 | 000000 |
3 | 457 | 450 | 63 | 89 | 17.5 | 3535 | Cast Iron | Solid | 00000000 | 000000 |
4 | 167 | 160 | 82 | 82 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |
4 | 197 | 190 | 82 | 82 | 17.5 | 2517 | Cast Iron | Solid | 00000000 | 000000 |

No. of Grooves | OD, mm | Pitch Dia., mm | Wd., mm | Overall Wd., mm | Groove Dp., mm | For Bushing Style | Material | Body Type | Each | |
1 | 67 | 63 | 16 | 22 | 11 | 1108 | Cast Iron | Solid | 00000000 | 000000 |
1 | 89 | 85 | 16 | 25 | 11 | 1210 | Cast Iron | Solid | 00000000 | 00000 |
1 | 104 | 100 | 16 | 25 | 11 | 1210 | Cast Iron | Solid | 00000000 | 00000 |
1 | 194 | 190 | 16 | 25 | 11 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 67 | 63 | 28 | 28 | 11 | 1108 | Cast Iron | Solid | 00000000 | 00000 |
2 | 89 | 85 | 28 | 28 | 11 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 104 | 100 | 28 | 28 | 11 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 129 | 125 | 28 | 28 | 11 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 136 | 132 | 28 | 28 | 11 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
2 | 174 | 170 | 28 | 32 | 11 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
2 | 228 | 224 | 28 | 32 | 11 | 2012 | Cast Iron | Solid | 00000000 | 000000 |
2 | 284 | 280 | 28 | 32 | 11 | 2012 | Cast Iron | Solid | 0000000 | 000000 |
3 | 89 | 85 | 40 | 40 | 11 | 1610 | Cast Iron | Solid | 00000000 | 00000 |
3 | 116 | 112 | 40 | 40 | 11 | 2012 | Cast Iron | Solid | 00000000 | 00000 |
3 | 136 | 132 | 40 | 40 | 11 | 2012 | Cast Iron | Solid | 00000000 | 00000 |