Component Component |
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| Gear | Gear Rack |
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| Gear Stock |
System of Measurement System of Measurement |
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For Shaft Diameter For Shaft Diameter |
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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 |
Gear Rack Shape Gear Rack Shape |
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| Rectangular | Round |
Teeth Heat Treatment Teeth Heat Treatment |
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Hub Diameter Hub Diameter |
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For Shaft Angle For Shaft Angle |
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 | 90° |
Speed Ratio Speed Ratio |
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About Gears
More
Metal 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. 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 | ||||||||||||
| 20 | 12 | 0.6" | 0.7" | 1/2" | 0.94" | 5/16" | 1117 Carbon Steel | Not Hardened | 0.46" | 0.44" | 0000000 | 000000 |
| 20 | 15 | 0.75" | 0.85" | 1/2" | 0.938" | 3/8" | 1144 Carbon Steel | Hardened | 0.603" | 0.437" | 0000000 | 00000 |
| 20 | 15 | 0.75" | 0.85" | 1/2" | 0.94" | 3/8" | 1020 Carbon Steel | Not Hardened | 0.6" | 0.44" | 0000000 | 00000 |
| 20 | 20 | 1" | 1.1" | 1/2" | 0.938" | 1/2" | 1144 Carbon Steel | Hardened | 0.853" | 0.438" | 0000000 | 00000 |
| 20 | 20 | 1" | 1.1" | 1/2" | 0.94" | 1/2" | 1020 Carbon Steel | Not Hardened | 0.84" | 0.44" | 0000000 | 00000 |
| 20 | 24 | 1.2" | 1.3" | 1/2" | 0.94" | 1/2" | 1117 Carbon Steel | Not Hardened | 0.92" | 0.44" | 0000000 | 00000 |
| 20 | 25 | 1.25" | 1.35" | 1/2" | 0.94" | 1/2" | 1020 Carbon Steel | Not Hardened | 0.97" | 0.44" | 0000000 | 00000 |
| 20 | 30 | 1.5" | 1.6" | 1/2" | 0.94" | 1/2" | 1020 Carbon Steel | Not Hardened | 1.22" | 0.44" | 0000000 | 00000 |
| 20 | 35 | 1.75" | 1.85" | 1/2" | 1" | 1/2" | 1020 Carbon Steel | Not Hardened | 1.47" | 0.5" | 0000000 | 00000 |
| 20 | 40 | 2" | 2.1" | 1/2" | 1" | 1/2" | 1020 Carbon Steel | Not Hardened | 1.72" | 0.5" | 0000000 | 00000 |
| 20 | 50 | 2.5" | 2.6" | 1/2" | 1" | 1/2" | 1117 Carbon Steel | Not Hardened | 1.62" | 0.5" | 0000000 | 00000 |
| 20 | 60 | 3" | 3.1" | 1/2" | 1" | 1/2" | 1117 Carbon Steel | Not Hardened | 2.12" | 0.5" | 0000000 | 00000 |
| Pitch | Lg., ft. | Pitch Ht. | Ht. | Dia. | Face Wd. | Material | Teeth Heat Treatment | Each | |
| 20 | 2 | 0.625" | 43/64" | 3/4" | 29/64" | 12L14 Carbon Steel | Not Hardened | 000000 | 000000 |
Metal Gears and Gear Racks—14 1/2° Pressure Angle
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 | |||||||||||||||
| 20 | 12 | 0.6" | 0.7" | 3/8" | 0.75" | 5/16" | 1144 Carbon Steel | Hardened | 0.469" | 0.375" | __ | __ | __ | 00000000 | 000000 |
| 20 | 12 | 0.6" | 0.7" | 3/8" | 0.75" | 5/16" | 1144 Carbon Steel | Not Hardened | 0.469" | 0.375" | __ | __ | __ | 0000000 | 00000 |
| 20 | 15 | 0.75" | 0.85" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.609" | 0.375" | __ | __ | __ | 0000000 | 00000 |
| 20 | 16 | 0.8" | 0.9" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.656" | 0.375" | __ | __ | __ | 0000000 | 00000 |
| 20 | 20 | 1" | 1.1" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Hardened | 0.859" | 0.375" | __ | __ | __ | 00000000 | 00000 |
| 20 | 20 | 1" | 1.1" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.859" | 0.375" | __ | __ | __ | 0000000 | 00000 |
| 20 | 23 | 1.15" | 1.25" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.969" | 0.375" | __ | __ | __ | 0000000 | 00000 |
Round/Machinable Bore | |||||||||||||||
| 20 | 24 | 1.2" | 1.3" | 3/8" | 0.75" | 3/8"-9/16" | 1144 Carbon Steel | Hardened | 1.063" | 0.375" | __ | __ | __ | 00000000 | 00000 |
| 20 | 24 | 1.2" | 1.3" | 3/8" | 0.75" | 3/8"-9/16" | 1144 Carbon Steel | Not Hardened | 1.063" | 0.375" | __ | __ | __ | 0000000 | 00000 |
| 20 | 25 | 1.25" | 1.35" | 3/8" | 0.75" | 3/8"-5/8" | 1144 Carbon Steel | Not Hardened | 1.109" | 0.375" | __ | __ | __ | 0000000 | 00000 |
| 20 | 32 | 1.6" | 1.7" | 3/8" | 0.875" | 3/8"-7/8" | 1144 Carbon Steel | Not Hardened | 1.438" | 0.5" | __ | __ | __ | 0000000 | 00000 |
| 20 | 36 | 1.8" | 1.9" | 3/8" | 0.875" | 3/8"-15/16" | 1144 Carbon Steel | Not Hardened | 1.625" | 0.5" | __ | __ | __ | 0000000 | 00000 |
| 20 | 48 | 2.4" | 2.5" | 3/8" | 0.875" | 3/8"-1 1/4" | 1144 Carbon Steel | Not Hardened | 2" | 0.5" | __ | __ | __ | 0000000 | 00000 |
| 20 | 60 | 3" | 3.1" | 3/8" | 0.875" | 3/8"-1 1/4" | 1144 Carbon Steel | Not Hardened | 2" | 0.5" | __ | __ | __ | 0000000 | 00000 |
Round Bore with Set Screw | |||||||||||||||
| 20 | 15 | 0.75" | 0.85" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.609" | 0.375" | __ | __ | 8-32 | 0000000 | 00000 |
| 20 | 16 | 0.8" | 0.9" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.656" | 0.375" | __ | __ | 8-32 | 0000000 | 00000 |
Keyed Bore with Set Screw | |||||||||||||||
| 20 | 20 | 1" | 1.1" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.859" | 0.375" | 0.094" | 0.047" | 10-24 | 0000000 | 00000 |
| 20 | 23 | 1.15" | 1.25" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 0.969" | 0.375" | 0.094" | 0.047" | 10-24 | 0000000 | 00000 |
| 20 | 24 | 1.2" | 1.3" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 1.063" | 0.375" | 0.094" | 0.047" | 1/4"-20 | 0000000 | 00000 |
| 20 | 25 | 1.25" | 1.35" | 3/8" | 0.75" | 3/8" | 1144 Carbon Steel | Not Hardened | 1.109" | 0.375" | 0.094" | 0.047" | 1/4"-20 | 0000000 | 00000 |
| 20 | 32 | 1.6" | 1.7" | 3/8" | 0.875" | 3/8" | 1144 Carbon Steel | Not Hardened | 1.439" | 0.5" | 0.094" | 0.047" | 1/4"-20 | 0000000 | 00000 |
| 20 | 36 | 1.8" | 1.9" | 3/8" | 0.875" | 3/8" | 1144 Carbon Steel | Not Hardened | 1.625" | 0.5" | 0.094" | 0.047" | 1/4"-20 | 0000000 | 00000 |
| 20 | 48 | 2.4" | 2.5" | 3/8" | 0.875" | 3/8" | 1144 Carbon Steel | Not Hardened | 2" | 0.5" | 0.094" | 0.047" | 10-24 | 0000000 | 00000 |
| 20 | 60 | 3" | 3.1" | 3/8" | 0.875" | 3/8" | 1144 Carbon Steel | Not Hardened | 2" | 0.5" | 0.094" | 0.047" | 10-24 | 0000000 | 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 | |
| 20 | 4ft. | 0.325" | 3/8" | 3/8" | 1018 Carbon Steel | Not Hardened | 12 | 4" | 2" | No. 3 | No | 000000 | 000000 |
Metal Miter Gears
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 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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. | Each | |
Round Bore—1117 Carbon Steel | ||||||||||||||
| 20 | 12 | 90° | 20° | 0.6" | 0.67" | 0.13" | 0.489" | 1/4" | 0.672" | Not Hardened | 0.5" | 0.31" | 0000000 | 000000 |
Round Bore—1144 Carbon Steel | ||||||||||||||
| 20 | 20 | 90° | 20° | 1" | 1.07" | 0.23" | 0.625" | 3/8" | 1.125" | Not Hardened | 0.75" | 0.5" | 0000000 | 00000 |
| 20 | 25 | 90° | 20° | 1.25" | 1.32" | 1/4" | 0.75" | 3/8" | 1.188" | Not Hardened | 1" | 0.375" | 0000000 | 00000 |
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.
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 | Fabrication | Color | Dia. | Wd. | Each | |
Round Bore | |||||||||||||
| 20 | 12 | 0.6" | 0.7" | 3/8" | 0.75" | 1/4" | Acetal Plastic | Molded | White | 0.469" | 0.375" | 000000 | 00000 |
| 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 | 0000 |
| 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 | 0000 |
Plastic Gears and Gear Racks—14 1/2° Pressure Angle
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.
Round/Machinable
Bore
| Pitch | Lg. | Pitch Ht. | Ht. | Face Wd. | Material | Fabrication | Color | Each | |
| 20 | 4ft. | 0.325" | 3/8" | 3/8" | Nylon Plastic | Machined | Green | 00000000 | 0000000 |
Gear Rod Stock
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.