About Roller Chain and Sprockets
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About Gears
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Sprockets for Metric Roller Chain
Designed to meet ISO 606 and DIN 8187 international dimensional standards, these sprockets are for use with compatible ISO and DIN roller chain. They come machined to the shaft diameter size listed and are machinable up to the maximum shaft diameter size.
For technical drawings and 3-D models, click on a part number.
Number of Teeth | For Shaft Dia., mm | For Max. Shaft Dia., mm | OD, mm | Overall Wd., mm | Hub Dia., mm | Material | Specifications Met | Each | |
For ISO 04B Roller Chain (6 mm Pitch) | |||||||||
---|---|---|---|---|---|---|---|---|---|
30 | 8 | 19 | 59.9 | 15 | 30 | Steel | DIN 8187, ISO 606 | 0000000 | 000000 |
For ISO 05B Roller Chain (8 mm Pitch) | |||||||||
16 | 8 | 19 | 45 | 14 | 30 | Steel | DIN 8187, ISO 606 | 0000000 | 00000 |
17 | 8 | 20 | 47.6 | 14 | 30 | Steel | DIN 8187, ISO 606 | 0000000 | 00000 |
18 | 8 | 22 | 50 | 14 | 30 | Steel | DIN 8187, ISO 606 | 0000000 | 00000 |
19 | 8 | 24 | 52.5 | 14 | 30 | Steel | DIN 8187, ISO 606 | 0000000 | 00000 |
20 | 8 | 25 | 55 | 14 | 30 | Steel | DIN 8187, ISO 606 | 0000000 | 00000 |
For ISO 08B Roller Chain (12.7 mm Pitch) | |||||||||
11 | 10 | 22 | 51.4 | 25 | 30 | Steel | DIN 8187, ISO 606 | 00000000 | 00000 |
XL Series Corrosion-Resistant Timing Belt Pulleys
Pulleys are anodized aluminum, which is more corrosion resistant than steel. They are XL series (extra light) and have trapezoidal teeth. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.
For technical drawings and 3-D models, click on a part number.
OD, mm | Number of Teeth | Pitch, mm | For Shaft Dia., mm | Bore Type | Inside Wd., mm | Outside Wd., mm | Overall Wd., mm | Pitch Dia., mm | Fabrication | Material | Hub Dia., mm | Each | |
For 9.5 mm Max. Belt Wd. | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
With Hub—Two Flanges | |||||||||||||
51 | 28 | 5.080 | 8 | Finished | 11.2 | 14.2 | 23.1 | 45.4 | Machined | Anodized Aluminum | 30 | 00000000 | 000000 |
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. Gears with teeth that are not hardened can be hardened to fit your application.
Stainless steel gears and racks resist rust in damp and wet environments, so they're commonly used in food-processing plants and other areas with frequent cleaning.
For technical drawings and 3-D models, click on a part number.
Hub | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Module | Number of Teeth | Gear Pitch Dia., mm | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Material | Teeth Heat Treatment | Dia., mm | Wd., mm | Each | |
Round Bore | ||||||||||||
1.5 | 25 | 37.5 | 40 | 15 | 29 | 8 | 303 Stainless Steel | Not Hardened | 30 | 14 | 00000000 | 000000 |
1.5 | 25 | 37.5 | 40.5 | 15 | 25 | 8 | Black-Oxide 1045 Carbon Steel | Not Hardened | 30 | 10 | 00000000 | 00000 |
2 | 18 | 36 | 40 | 20 | 36 | 12 | 303 Stainless Steel | Not Hardened | 30 | 16 | 00000000 | 00000 |
2.5 | 15 | 37.5 | 42 | 25 | 43 | 15 | 303 Stainless Steel | Not Hardened | 30 | 18 | 00000000 | 00000 |
High-Power Metal Gears
and Crossed Left-Hand
Gear (Sold Separately)
with Right-Hand
Teeth (Sold Separately)
The helical teeth on these gears stay in contact for longer than straight teeth, which allows them to transmit higher loads at higher speeds than spur gears.
For gears to mesh correctly, they must have the same pressure angle and pitch. All of these gears transmit motion in a straight line—make sure to get one left-hand and one right-hand gear. To change speed and torque in your assembly, pair two gears with different numbers of teeth.
Parallel helical components have a 21 1/2° helix angle so they only transmit motion in a straight line since the helix angle is so small. Made from alloy steel, these gears resist abrasion and are stronger than carbon steel gears. Their teeth are ground, so they're more precise than gears with rolled teeth. Pair them with a rack or a gear that has a different tooth direction.
Crossed helical gears, also known as screw gears, can be configured to transmit motion at a 90° angle. To transmit motion at a 90° angle, pair two gears with the same tooth direction. To avoid wearing down gears, which happens when you use the same material, we recommend mating gears with different materials. Made from carbon steel, these gears are strong, but not as strong as alloy steel gears.
Gears with hardened teeth have better wear resistance than gears with teeth that are not hardened.
For technical drawings and 3-D models, click on a part number.
Hub | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Module | Number of Teeth | Helix Angle | Gear Pitch Dia., mm | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Teeth Heat Treatment | Dia., mm | Wd., mm | Each | |
Left Hand | ||||||||||||
Round Bore—Black-Oxide 1045 Carbon Steel | ||||||||||||
1 | 26 | 45° | 36 | 38.77 | 10 | 20 | 10 | Not Hardened | 30 | 10 | 00000000 | 000000 |
Right Hand | ||||||||||||
Round Bore—Black-Oxide 1045 Carbon Steel | ||||||||||||
1 | 26 | 45° | 36 | 38.77 | 10 | 20 | 10 | Not Hardened | 30 | 10 | 00000000 | 00000 |
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.
Stainless steel gears won’t rust in damp or wet environments. They’re commonly used in food-processing plants and other areas where frequent cleaning takes place.
For technical drawings and 3-D models, click on a part number.
Hub | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Module | Number of Teeth | For Shaft Angle | Pressure Angle | Gear Pitch Dia., mm | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Mounting Distance, mm | Teeth Heat Treatment | Dia., mm | Wd., mm | Set Screw Thread Size | Each | |
Round Bore with Set Screw—303 Stainless Steel | |||||||||||||||
1.5 | 25 | 90° | 20° | 38 | 39.6 | 9 | 22.3 | 10 | 34 | Not Hardened | 30 | 11.5 | M4 | 0000000 | 000000 |
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.
1045 carbon steel worms have rolled threads. 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.
Hub | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Module | Pressure Angle | Worm Lg., mm | Gear Pitch Dia., mm | OD, mm | For Shaft Dia., mm | Number of Thread Starts | Dia., mm | Material | Thread Direction | Teeth Heat Treatment | Teeth Fabrication | Set Screw Included | Each | |
Round Bore—Black-Oxide 1045 Carbon Steel | ||||||||||||||
2.5 | 20° | 63 | 37 | 42 | 15 | 2 | 30 | 1045 Carbon Steel | Right Hand | Not Hardened | Not Ground | No | 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 | 60:1 | 60 | 20° | 60 | 1 | 63 | 10 | 20 | 10 | 30 | 10 | Cast Iron | Right Hand | Not Hardened | Not Ground | 000000000 | 000000 |
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 |
Round Bore—Bronze | |||||||||||||||||
1.5 | 15:1 | 30 | 20° | 45 | 2 | 49.5 | 12 | 22 | 10 | 30 | 10 | Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
1.5 | 30:1 | 30 | 20° | 45 | 1 | 49.5 | 12 | 22 | 10 | 30 | 10 | Bronze | Right Hand | Not Hardened | Not Ground | 000000000 | 00000 |
Metal Bevel Gears
A type of miter gear where one gear (sometimes called a pinion) is smaller than the other, bevel gears provide right-angle speed reduction at speed ratios ranging from 2:1 to 5:1. All are carbon steel for strength; they're compatible with plastic bevel gears. Teeth are not hardened so you can harden them to fit your application. Hardening a gear’s teeth increases its wear resistance.
A complete set consists of a gear and pinion (sold separately). For a gear and pinion to mesh correctly, they must have the same pressure angle, pitch/module, and face width. Speed ratio is the ratio by which shaft speed is reduced when transferring motion from pinion to gear. To increase shaft speed, transfer motion from gear to pinion. Changing shaft speed also changes torque: as speed decreases, torque increases.
For technical drawings and 3-D models, click on a part number.
Hub | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Face Wd., mm | Module | Pressure Angle | Speed Ratio | Number of Teeth | Gear Pitch Dia., mm | OD, mm | Overall Wd., mm | For Shaft Dia., mm | Mounting Distance (A), mm | Dia., mm | Wd., mm | Material | Each | |
Round Bore | ||||||||||||||
6 | 1 | 20° | 3:1 | 45 | 45 | 45 | 12 | 8 | 17 | 30 | 5 | Black-Oxide 1045 Carbon Steel | 00000000 | 000000 |
11 | 2 | 20° | 2:1 | 30 | 60 | 61 | 22 | 10 | 31 | 30 | 10 | Black-Oxide 1045 Carbon Steel | 00000000 | 00000 |
Hub | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Face Wd., mm | Module | Pressure Angle | Speed Ratio | Number of Teeth | Gear Pitch Dia., mm | OD, mm | Overall Wd., mm | For Shaft Dia., mm | Mounting Distance (B), mm | Dia., mm | Wd., mm | Material | Each | |
Round Bore | ||||||||||||||
6 | 1 | 20° | 3:1 | 15 | 15 | 18 | 13 | 6 | 29 | 12 | 6 | Black-Oxide 1045 Carbon Steel | 00000000 | 000000 |
11 | 2 | 20° | 2:1 | 15 | 30 | 35 | 21 | 8 | 40 | 22 | 8 | Black-Oxide 1045 Carbon Steel | 00000000 | 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.
Nylon gears can be operated without lubrication, so they’re commonly used in food-processing machines.
For technical drawings and 3-D models, click on a part number.
Hub | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Module | Number of Teeth | Gear Pitch Dia., mm | OD, mm | Face Wd., mm | Overall Wd., mm | For Shaft Dia., mm | Material | Fabrication | Color | Dia., mm | Wd., mm | Each | |
Round Bore | |||||||||||||
2 | 18 | 36 | 40 | 20 | 30 | 10 | Nylon Plastic | Machined | Blue | 30 | 10 | 00000000 | 000000 |
Plastic Worm Gears
These plastic gears are lighter and quieter than metal gears—pair them with metal worms for lubrication-free operation. 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 module.
Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.
Nylon gears are lightweight and stronger than acetal gears.
For technical drawings and 3-D models, click on a part number.
Hub | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Module | Speed Ratio | Number of Teeth | Pressure Angle | Gear Pitch Dia., mm | For Number of Thread Starts | OD, mm | Face Width, mm | Overall Width, mm | For Shaft Diameter, mm | Material | Fabrication | Color | Diameter, mm | Width, mm | For Thread Direction | Each | |
Round Bore | |||||||||||||||||
1 | 50:1 | 50 | 20° | 50 | 1 | 53 | 10 | 20 | 8 | Nylon Plastic | Molded | Blue | 30 | 10 | Right Hand | 00000000 | 000000 |