Component Component |
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Gear | Gear Rack |
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Worm | Gear Stock |
System of Measurement System of Measurement |
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For Shaft Diameter For Shaft Diameter |
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Gear Type Gear Type |
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Spur | Worm |
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Miter | Spiral Miter |
Pitch Pitch | Show |
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Pitch Pitch | Hide |
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Bore Type Bore Type |
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Round | Machinable |
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Keyed |
Pitch Diameter Pitch Diameter |
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OD OD |
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Teeth Heat Treatment Teeth Heat Treatment |
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Overall Width Overall Width |
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Hub Diameter Hub Diameter |
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Gear Rack Shape Gear Rack Shape |
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![]() | Rectangular |
For Shaft Angle For Shaft Angle |
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![]() | 90° |
Number of Thread Starts Number of Thread Starts |
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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.
Carbon steel components have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals. They're best for high-torque machines, like lifting equipment, and heavy duty applications, such as rock crushing. Some carbon steel gears have hardened teeth for even better wear resistance. Gears with teeth that are not hardened can be hardened to fit your application.
For technical drawings and 3-D models, click on a part number.
Hub | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Pitch | Number of Teeth | Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Material | Teeth Heat Treatment | Dia. | Wd. | Each | |
Round Bore | ||||||||||||
12 | 12 | 1" | 1.17" | 1" | 1.62" | 1/2" | 1020 Carbon Steel | Not Hardened | 0.75" | 0.62" | 0000000 | 000000 |
12 | 12 | 1" | 1.17" | 1" | 1.625" | 1/2" | 1144 Carbon Steel | Hardened | 0.75" | 0.625" | 0000000 | 00000 |
12 | 15 | 1.25" | 1.42" | 1" | 1.62" | 5/8" | 1020 Carbon Steel | Not Hardened | 0.99" | 0.62" | 0000000 | 00000 |
12 | 15 | 1.25" | 1.42" | 1" | 1.625" | 5/8" | 1144 Carbon Steel | Hardened | 0.984" | 0.625" | 0000000 | 00000 |
12 | 21 | 1.75" | 1.92" | 1" | 1.62" | 3/4" | 1020 Carbon Steel | Not Hardened | 1.4" | 0.62" | 0000000 | 00000 |
12 | 24 | 2" | 2.17" | 1" | 1.62" | 7/8" | 1020 Carbon Steel | Not Hardened | 1.65" | 0.62" | 0000000 | 00000 |
12 | 36 | 3" | 3.17" | 1" | 1.88" | 3/4" | 1020 Carbon Steel | Not Hardened | 1.94" | 0.88" | 0000000 | 00000 |
12 | 48 | 4" | 4.17" | 1" | 1.88" | 7/8" | 1020 Carbon Steel | Not Hardened | 2.88" | 0.88" | 0000000 | 00000 |
Round/Machinable Bore | ||||||||||||
12 | 21 | 1.75" | 1.92" | 1" | 1.625" | 3/4"-13/16" | 1144 Carbon Steel | Hardened | 1.391" | 0.625" | 0000000 | 00000 |
12 | 24 | 2" | 2.17" | 1" | 1.625" | 3/4"-15/16" | 1144 Carbon Steel | Hardened | 1.641" | 0.625" | 0000000 | 00000 |
A former industry standard, 14½° pressure angle gears are often found on older machinery. Made of carbon steel, they have high strength and are better than plastic gears and gear racks for high-load, high-speed, and heavy duty applications.
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.
Gears with machinable bore have a large hub diameter so you can machine them to fit your shaft.
Gears with hardened teeth are more wear resistant than gears with teeth that are not hardened.Gears with teeth that are not hardened can be hardened to fit your application. Hardening a gear's teeth increases its wear resistance.
For technical drawings and 3-D models, click on a part number.
Hub | Keyway | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pitch | Number of Teeth | Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Material | Teeth Heat Treatment | Dia. | Wd. | Wd. | Dp. | Set Screw Thread Size | Each | |
Round Bore | |||||||||||||||
12 | 12 | 1" | 1.17" | 3/4" | 1.25" | 1/2" | 1144 Carbon Steel | Hardened | 0.75" | 0.5" | __ | __ | __ | 00000000 | 000000 |
12 | 12 | 1" | 1.17" | 3/4" | 1.25" | 1/2" | 1144 Carbon Steel | Not Hardened | 0.75" | 0.5" | __ | __ | __ | 0000000 | 00000 |
12 | 14 | 1.167" | 1.33" | 3/4" | 1.25" | 1/2" | 1144 Carbon Steel | Not Hardened | 0.906" | 0.5" | __ | __ | __ | 0000000 | 00000 |
12 | 15 | 1.25" | 1.42" | 3/4" | 1.25" | 5/8" | 1144 Carbon Steel | Not Hardened | 1" | 0.5" | __ | __ | __ | 0000000 | 00000 |
12 | 16 | 1.333" | 1.5" | 3/4" | 1.25" | 5/8" | 1144 Carbon Steel | Not Hardened | 1.063" | 0.5" | __ | __ | __ | 0000000 | 00000 |
Round/Machinable Bore | |||||||||||||||
12 | 18 | 1.5" | 1.67" | 3/4" | 1.25" | 5/8"-11/16" | 1144 Carbon Steel | Hardened | 1.25" | 0.5" | __ | __ | __ | 00000000 | 00000 |
12 | 18 | 1.5" | 1.67" | 3/4" | 1.25" | 5/8"-11/16" | 1144 Carbon Steel | Not Hardened | 1.25" | 0.5" | __ | __ | __ | 0000000 | 00000 |
12 | 20 | 1.667" | 1.83" | 3/4" | 1.25" | 5/8"-13/16" | 1144 Carbon Steel | Not Hardened | 1.406" | 0.5" | __ | __ | __ | 0000000 | 00000 |
12 | 24 | 2" | 2.17" | 3/4" | 1.25" | 5/8"-1" | 1144 Carbon Steel | Hardened | 1.75" | 0.5" | __ | __ | __ | 00000000 | 00000 |
12 | 24 | 2" | 2.17" | 3/4" | 1.25" | 5/8"-1" | 1144 Carbon Steel | Not Hardened | 1.75" | 0.5" | __ | __ | __ | 0000000 | 00000 |
12 | 30 | 2.5" | 2.67" | 3/4" | 1.375" | 5/8"-1 5/16" | 1144 Carbon Steel | Not Hardened | 2.25" | 0.625" | __ | __ | __ | 0000000 | 00000 |
12 | 32 | 2.667" | 2.83" | 3/4" | 1.375" | 5/8"-1 5/16" | 1144 Carbon Steel | Not Hardened | 2.25" | 0.625" | __ | __ | __ | 0000000 | 00000 |
12 | 36 | 3" | 3.17" | 3/4" | 1.375" | 5/8"-1 1/2" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.625" | __ | __ | __ | 000000 | 00000 |
12 | 40 | 3.333" | 3.5" | 3/4" | 1.375" | 5/8"-1 1/2" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.625" | __ | __ | __ | 000000 | 00000 |
12 | 42 | 3.5" | 3.67" | 3/4" | 1.375" | 5/8"-1 1/2" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.625" | __ | __ | __ | 000000 | 00000 |
12 | 48 | 4" | 4.17" | 3/4" | 1.5" | 5/8"-1 1/2" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.75" | __ | __ | __ | 0000000 | 00000 |
12 | 60 | 5" | 5.17" | 3/4" | 1.5" | 3/4"-1 3/4" | 1144 Carbon Steel | Not Hardened | 2.75" | 0.75" | __ | __ | __ | 000000 | 00000 |
Round Bore with Set Screw | |||||||||||||||
12 | 12 | 1" | 1.17" | 3/4" | 1.25" | 1/2" | 1144 Carbon Steel | Not Hardened | 0.75" | 0.5" | __ | __ | 10-24 | 0000000 | 00000 |
Keyed Bore with Set Screw | |||||||||||||||
12 | 14 | 1.167" | 1.33" | 3/4" | 1.25" | 1/2" | 1144 Carbon Steel | Not Hardened | 0.906" | 0.5" | 0.125" | 0.063" | 10-24 | 0000000 | 00000 |
12 | 15 | 1.25" | 1.42" | 3/4" | 1.25" | 5/8" | 1144 Carbon Steel | Not Hardened | 1" | 0.5" | 0.188" | 0.094" | 10-24 | 0000000 | 00000 |
12 | 16 | 1.333" | 1.5" | 3/4" | 1.25" | 5/8" | 1144 Carbon Steel | Not Hardened | 1.063" | 0.5" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 18 | 1.5" | 1.67" | 3/4" | 1.25" | 5/8" | 1144 Carbon Steel | Not Hardened | 1.25" | 0.5" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 20 | 1.667" | 1.83" | 3/4" | 1.25" | 5/8" | 1144 Carbon Steel | Not Hardened | 1.406" | 0.5" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 24 | 2" | 2.17" | 3/4" | 1.25" | 5/8" | 1144 Carbon Steel | Not Hardened | 1.75" | 0.5" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 30 | 2.5" | 2.67" | 3/4" | 1.375" | 5/8" | 1144 Carbon Steel | Not Hardened | 2.25" | 0.625" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 32 | 2.667" | 2.83" | 3/4" | 1.375" | 5/8" | 1144 Carbon Steel | Not Hardened | 2.25" | 0.625" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 36 | 3" | 3.17" | 3/4" | 1.375" | 5/8" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.625" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 40 | 3.333" | 3.5" | 3/4" | 1.375" | 5/8" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.625" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 42 | 3.5" | 3.67" | 3/4" | 1.375" | 5/8" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.625" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 48 | 4" | 4.17" | 3/4" | 1.5" | 5/8" | 1144 Carbon Steel | Not Hardened | 2.5" | 0.75" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 000000 |
12 | 60 | 5" | 5.17" | 3/4" | 1.5" | 3/4" | 1144 Carbon Steel | Not Hardened | 2.75" | 0.75" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 000000 |
Pitch | Lg. | Pitch Ht. | Ht. | Face Wd. | Material | Teeth Heat Treatment | Each | |
12 | 2ft. | 0.417" | 1/2" | 3/4" | 1018 Carbon Steel | Not Hardened | 0000000 | 000000 |
12 | 2ft. | 0.667" | 3/4" | 3/4" | 1018 Carbon Steel | Not Hardened | 0000000 | 00000 |
12 | 4ft. | 0.417" | 1/2" | 3/4" | 1018 Carbon Steel | Not Hardened | 00000000 | 00000 |
12 | 4ft. | 0.667" | 3/4" | 3/4" | 1018 Carbon Steel | Not Hardened | 00000000 | 00000 |
12 | 6ft. | 0.417" | 1/2" | 3/4" | 1018 Carbon Steel | Not Hardened | 00000000 | 00000 |
12 | 6ft. | 0.667" | 3/4" | 3/4" | 1018 Carbon Steel | Not Hardened | 00000000 | 00000 |
Mounting Hole | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pitch | Lg. | Pitch Ht. | Ht. | Face Wd. | Material | Teeth Heat Treatment | Number of | Center-to-Center | Center-to-End | For Mounting Screw Size | Mounting Fasteners Included | Each | |
12 | 4ft. | 0.667" | 3/4" | 3/4" | 1018 Carbon Steel | Not Hardened | 12 | 4" | 2" | 1/4" | No | 000000 | 000000 |
With straight, conically shaped teeth and a 1:1 speed ratio, miter gears connect two shafts at an angle without changing shaft speed or torque. They're more efficient than spiral miter gears because they create less friction.
For two gears to mesh correctly, they must have the same pressure angle, shaft angle, pitch/module, and number of teeth.
Carbon steel gears have hard, strong, and wear-resistant teeth. They’re best for heavy duty and high-torque applications, such as lifting equipment. However, these gears will rust when exposed to moisture or corrosive chemicals. Some gears have hardened teeth for additional wear resistance; gears with teeth that are not hardened can be hardened to fit your application.
For technical drawings and 3-D models, click on a part number.
Hub | Keyway | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pitch | Number of Teeth | For Shaft Angle | Pressure Angle | Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Mounting Distance | Teeth Heat Treatment | Dia. | Wd. | Wd. | Dp. | Set Screw Thread Size | Each | |
Round Bore—1144 Carbon Steel | |||||||||||||||||
12 | 15 | 90° | 20° | 1.25" | 1.37" | 0.27" | 0.859" | 3/8" | 1.25" | Not Hardened | 1" | 0.5" | __ | __ | __ | 0000000 | 000000 |
12 | 15 | 90° | 20° | 1.25" | 1.37" | 0.27" | 0.859" | 1/2" | 1.25" | Not Hardened | 1" | 0.5" | __ | __ | __ | 0000000 | 00000 |
12 | 18 | 90° | 20° | 1.5" | 1.62" | 0.32" | 1.016" | 1/2" | 1.5" | Not Hardened | 1.25" | 0.625" | __ | __ | __ | 0000000 | 00000 |
12 | 18 | 90° | 20° | 1.5" | 1.62" | 0.32" | 1.016" | 5/8" | 1.5" | Not Hardened | 1.25" | 0.625" | __ | __ | __ | 0000000 | 00000 |
12 | 21 | 90° | 20° | 1.75" | 1.87" | 0.39" | 1.188" | 1/2" | 1.75" | Not Hardened | 1.375" | 0.688" | __ | __ | __ | 0000000 | 00000 |
12 | 21 | 90° | 20° | 1.75" | 1.87" | 0.39" | 1.188" | 5/8" | 1.75" | Not Hardened | 1.375" | 0.688" | __ | __ | __ | 0000000 | 00000 |
12 | 24 | 90° | 20° | 2" | 2.12" | 0.43" | 1.219" | 1/2" | 1.875" | Not Hardened | 1.5" | 0.688" | __ | __ | __ | 0000000 | 00000 |
12 | 30 | 90° | 20° | 2.5" | 2.62" | 0.54" | 1.484" | 5/8" | 2.313" | Not Hardened | 1.75" | 0.844" | __ | __ | __ | 0000000 | 00000 |
Keyed Bore with Set Screw—1144 Carbon Steel | |||||||||||||||||
12 | 15 | 90° | 20° | 1.25" | 1.37" | 0.27" | 0.859" | 1/2" | 1.25" | Hardened | 1" | 0.5" | 0.125" | 0.063" | 10-24 | 0000000 | 00000 |
12 | 18 | 90° | 20° | 1.5" | 1.62" | 0.32" | 1.016" | 5/8" | 1.5" | Hardened | 1.25" | 0.625" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 21 | 90° | 20° | 1.75" | 1.87" | 0.39" | 1.188" | 5/8" | 1.75" | Hardened | 1.375" | 0.688" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
12 | 30 | 90° | 20° | 2.5" | 2.62" | 0.54" | 1.484" | 5/8" | 2.313" | Hardened | 1.75" | 0.844" | 0.188" | 0.094" | 1/4"-20 | 0000000 | 00000 |
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.
Bronze gears have low friction and dissipate heat better than cast iron gears to provide a long service life for both the gear and the worm. They’re also more corrosion resistant than cast iron gears.
For technical drawings and 3-D models, click on a part number.
Keyway | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pitch | Pressure Angle | Worm Length | Pitch Dia. | OD | For Shaft Dia. | Number of Thread Starts | Wd. | Dp. | Thread Direction | Teeth Heat Treatment | Teeth Fabrication | Each | |
Keyed Bore—1144 Carbon Steel | |||||||||||||
12 | 14 1/2° | 1 1/8" | 1" | 1.17" | 1/2" | 1 | 0.125" | 0.063" | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
Hub | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 |
Round Bore—Bronze | |||||||||||||||||
12 | 20:1 | 20 | 14 1/2° | 1.67" | 1 | 1.87" | 1/2" | 1" | 1/2" | 1.25" | 0.5" | Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
12 | 30:1 | 30 | 14 1/2° | 2.5" | 1 | 2.7" | 1/2" | 1.12" | 1/2" | 1.19" | 0.62" | Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
12 | 40:1 | 40 | 14 1/2° | 3.33" | 1 | 3.54" | 1/2" | 1.12" | 5/8" | 1.44" | 0.62" | Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
Also known as spiral miter gears, these gears have curved teeth that stay in contact longer than straight teeth so they handle heavier loads at higher speeds. They run quieter than standard miter gears because the teeth gradually engage. Use them to transmit motion at a right angle while maintaining shaft speed and torque. Gears are carbon steel for strength. Teeth are hardened for wear resistance.
Gears must be identical in order to mesh correctly; they're sold as a pair.
For technical drawings and 3-D models, click on a part number.
Hub | Keyway | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pitch | Number of Teeth | Pressure Angle | Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Mounting Distance | Material | Dia. | Wd. | Wd. | Dp. | Set Screw Thread Size | Pair | |
Keyed Bore with Set Screw | ||||||||||||||||
12 | 15 | 20° | 1.25" | 1.36" | 0.3" | 0.86" | 1/2" | 1.25" | 1117 Carbon Steel | 1" | 0.5" | 0.125" | 0.063" | 1/4"-20 | 000000 | 0000000 |
12 | 18 | 20° | 1.5" | 1.61" | 0.34" | 1.02" | 5/8" | 1.5" | 1117 Carbon Steel | 1.25" | 0.56" | 0.188" | 0.094" | 5/16"-18 | 000000 | 000000 |
A former industry standard, 14½° pressure angle gears are often found on older machinery. 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.
Gears with machinable bore have a large hub diameter so you can machine them to fit your shaft.
For technical drawings and 3-D models, click on a part number.
Pitch | Lg. | Pitch Ht. | Ht. | Face Wd. | Material | Fabrication | Color | Each | |
12 | 4ft. | 0.667" | 3/4" | 3/4" | Nylon Plastic | Machined | Green | 00000000 | 0000000 |
Machine your own gears to fit the exact face width and shaft diameter required. Rod stock has teeth with a 20° pressure angle, the current industry standard. 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears. Teeth are not hardened so you can machine and harden them to fit your application. Hardening a gear’s teeth increases its wear resistance. Also known as spur gear rod stock.
For gears to mesh correctly, they must have the same pressure angle and pitch.
For technical drawings and 3-D models, click on a part number.