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Flat-Belt Idler Pulleys




These pulleys spin freely on built-in bearings to maintain tension for reduced wear and vibration. They’re often used with belt tensioners (sold separately).
Nylon pulleys are lightweight and corrosion resistant. Steel and cast iron pulleys are more durable than nylon pulleys.
Pulleys with ball bearings ensure proper positioning inside a tube or housing. They’re sealed to block out dust and contaminants better than pulleys with needle roller bearings.
Pulleys with needle roller bearings minimize internal friction.
For Belt Wd. | OD | For Shaft Dia. | Dia. | Wd. | Groove Dp. | Material | Each | |
With Ball Bearings | ||||||||
---|---|---|---|---|---|---|---|---|
5/8" | 3 1/2" | 3/8" | 3" | 1 3/32" | 0.25" | Nylon Plastic | 0000000 | 000000 |
5/8" | 3 1/2" | 1/2" | 3" | 1 3/32" | 0.25" | Nylon Plastic | 0000000 | 00000 |
11/16" | 2 1/2" | 0.635" | 2 1/4" | 7/8" | 0.125" | Cast Iron | 0000000 | 00000 |
13/16" | 2.8" | 3/8" | 2 33/64" | 1 7/32" | 0.11" | Nylon Plastic | 0000000 | 00000 |
13/16" | 2.8" | 1/2" | 2 33/64" | 1 7/32" | 0.11" | Nylon Plastic | 0000000 | 00000 |
13/16" | 3 1/2" | 3/8" | 3" | 1 7/32" | 0.25" | Nylon Plastic | 0000000 | 00000 |
13/16" | 3 1/2" | 1/2" | 3" | 1 7/32" | 0.25" | Nylon Plastic | 0000000 | 00000 |
7/8" | 2.4" | 3/8" | 2" | 1 5/32" | 0.18" | Nylon Plastic | 0000000 | 00000 |
7/8" | 2.4" | 1/2" | 2" | 1 5/32" | 0.18" | Nylon Plastic | 0000000 | 00000 |
7/8" | 3" | 3/8" | 2 1/2" | 1 5/16" | 0.25" | Nylon Plastic | 0000000 | 00000 |
7/8" | 3" | 1/2" | 2 1/2" | 1 5/16" | 0.25" | Nylon Plastic | 0000000 | 00000 |
7/8" | 5.6" | 3/8" | 5 1/32" | 1 19/64" | 0.26" | Nylon Plastic | 0000000 | 00000 |
7/8" | 5.6" | 1/2" | 5 1/32" | 1 19/64" | 0.26" | Nylon Plastic | 0000000 | 00000 |
29/32" | 4 1/2" | 3/8" | 4" | 1 25/64" | 0.25" | Nylon Plastic | 0000000 | 00000 |
29/32" | 4 1/2" | 1/2" | 4" | 1 25/64" | 0.25" | Nylon Plastic | 0000000 | 00000 |
1 1/16" | 4 1/2" | 0.635" | 4" | 1 7/16" | 0.25" | Cast Iron | 0000000 | 000000 |
1 1/8" | 2.1" | 3/8" | 1 7/8" | 1 35/64" | 0.09" | Nylon Plastic | 0000000 | 00000 |
1 1/8" | 2.1" | 1/2" | 1 7/8" | 1 35/64" | 0.09" | Nylon Plastic | 0000000 | 00000 |
1 1/8" | 3.4" | 3/8" | 2 31/32" | 1 43/64" | 0.2" | Nylon Plastic | 0000000 | 00000 |
1 1/8" | 3.4" | 1/2" | 2 31/32" | 1 43/64" | 0.2" | Nylon Plastic | 0000000 | 00000 |
2 1/16" | 4 1/2" | 0.635" | 4" | 2 7/16" | 0.25" | Cast Iron | 0000000 | 000000 |
3 1/16" | 4 1/2" | 0.635" | 4" | 3 7/16" | 0.25" | Cast Iron | 0000000 | 000000 |
4 1/2" | 7" | 1" | 6" | 5" | 0.5" | Cast Iron | 0000000 | 000000 |
6 1/4" | 7" | 1" | 6" | 6 3/4" | 0.5" | Cast Iron | 0000000 | 000000 |
With Needle Roller Bearings | ||||||||
7/16" | 1.4" | 1/2" | 1 1/8" | 5/8" | 0.125" | Steel | 000000 | 00000 |
9/16" | 1.8" | 1/2" | 1 3/8" | 13/16" | 0.187" | Steel | 000000 | 00000 |
11/16" | 2 1/2" | 1" | 2 1/4" | 7/8" | 0.125" | Steel | 000000 | 00000 |
1 1/16" | 4 1/2" | 1" | 4" | 1 7/16" | 0.25" | Cast Iron | 000000 | 000000 |
2 1/16" | 4 1/2" | 1" | 4" | 2 7/16" | 0.25" | Cast Iron | 000000 | 000000 |
3 1/16" | 4 1/2" | 1" | 4" | 3 7/16" | 0.25" | Cast Iron | 000000 | 000000 |
4 1/2" | 7" | 1 1/2" | 6" | 5" | 0.5" | Cast Iron | 0000000 | 000000 |
Flat-Belt Pulleys


Also known as paper-plant pulleys, these are made of a paper-fiber composite that minimizes belt slippage and wear.
Keyway | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
For Belt Wd. | OD | For Shaft Dia. | Dia. | Wd. | Wd. | Dp. | Material | Includes | Each | |
1" | 2" | 1/2" | 2" | 1 1/2" | 1/8" | 1/16" | Paper/Fiber Laminate | One Set Screw | 00000000 | 000000 |
1" | 2" | 5/8" | 2" | 1 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | One Set Screw | 00000000 | 00000 |
1" | 2" | 3/4" | 2" | 1 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | One Set Screw | 00000000 | 00000 |
1 1/2" | 2" | 1/2" | 2" | 2" | 1/8" | 1/16" | Paper/Fiber Laminate | One Set Screw | 00000000 | 00000 |
1 1/2" | 2" | 5/8" | 2" | 2" | 3/16" | 3/32" | Paper/Fiber Laminate | One Set Screw | 00000000 | 00000 |
1 1/2" | 2" | 3/4" | 2" | 2" | 3/16" | 3/32" | Paper/Fiber Laminate | One Set Screw | 00000000 | 00000 |
2 1/2" | 2" | 1/2" | 2" | 3" | 1/8" | 1/16" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 00000 |
2 1/2" | 2" | 5/8" | 2" | 3" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 00000 |
2 1/2" | 2" | 3/4" | 2" | 3" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 00000 |
3" | 2.5" | 3/4" | 2.5" | 3 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 2.5" | 7/8" | 2.5" | 3 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 2.5" | 1" | 2.5" | 3 1/2" | 1/4" | 1/8" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3" | 3/4" | 3" | 3 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3" | 7/8" | 3" | 3 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3" | 1" | 3" | 3 1/2" | 1/4" | 1/8" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3.5" | 3/4" | 3.5" | 3 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3.5" | 7/8" | 3.5" | 3 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3.5" | 1" | 3.5" | 3 1/2" | 1/4" | 1/8" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3.5" | 1 1/4" | 3.5" | 3 1/2" | 1/4" | 1/8" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
3" | 3.5" | 1 1/2" | 3.5" | 3 1/2" | 3/8" | 3/16" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
4" | 4" | 3/4" | 4" | 4 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
4" | 4" | 7/8" | 4" | 4 1/2" | 3/16" | 3/32" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
4" | 4" | 1" | 4" | 4 1/2" | 1/4" | 1/8" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
4" | 4" | 1 1/4" | 4" | 4 1/2" | 1/4" | 1/8" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
4" | 4" | 1 1/2" | 4" | 4 1/2" | 3/8" | 3/16" | Paper/Fiber Laminate | Two Set Screws | 00000000 | 000000 |
Abrasion-Resistant Made-to-Order Flat Belts


Made of polyurethane, these belts are chemical and abrasion resistant.
To Order: Please specify outer circumference in 1/4" increments.
Wd. | Thick. | Outer Circumference | For Min. Pulley Dia. | Material | Color | Per Inch | |
3/8" | 0.055" | 12"-1,200" | 3/8" | Polyurethane Rubber | Orange | 0000000 | 00000 |
1/2" | 0.062" | 12"-1,200" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |
5/8" | 0.125" | 12"-1,200" | 1" | Polyurethane Rubber | Orange | 0000000 | 0000 |
3/4" | 0.078" | 12"-1,200" | 5/8" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1" | 0.09" | 12"-1,200" | 3/4" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1 1/4" | 0.09" | 12"-1,200" | 3/4" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1 1/2" | 0.09" | 12"-1,200" | 3/4" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1 3/4" | 0.062" | 12"-1,200" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |
2" | 0.062" | 12"-1,200" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |
3" | 0.062" | 12"-1,200" | 7/8" | Polyurethane Rubber | Orange | 0000000 | 0000 |
Made-to-Order Flat Belts

These oil-resistant Buna-N belts have a nylon core.

Wd. | Thick. | For Min. Pulley Dia. | Material | Core Material | Color | Per Inch | |
3/16" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 00000 |
1/4" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
1/2" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
3/4" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
1" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
2 1/2" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |

To Order: Please specify outer circumference in 1/4" increments.
Wd. | Thick. | For Min. Pulley Dia. | Material | Core Material | Color | Per Inch | |
3/16" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 00000 |
1/4" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
1/2" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
3/4" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
1" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
2 1/2" | 0.03" | 19/32" | Buna-N Rubber | Nylon Plastic | Black and Green | 0000000 | 0000 |
Super-Grip Flat Belting



Commonly used for material handling and light to medium duty power transmission, this belting has a textured rubber cover on both sides for gripping material. To join ends, use alligator belt lacing.
Wd. | Wd. Tolerance | Material | Core Material | Color | For Min. Pulley Dia. | Per Ft. | |
Three Ply—0.141" Thick. | |||||||
---|---|---|---|---|---|---|---|
1 1/4" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 2 1/2" | 00000000 | 00000 |
1 1/2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 2 1/2" | 00000000 | 0000 |
2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 2 1/2" | 00000000 | 0000 |
2 1/2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 2 1/2" | 00000000 | 0000 |
3" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 2 1/2" | 00000000 | 0000 |
4" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 2 1/2" | 00000000 | 0000 |
6" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 2 1/2" | 00000000 | 00000 |
Four Ply—0.187" Thick. | |||||||
1 1/4" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3" | 00000000 | 0000 |
1 1/2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3" | 00000000 | 0000 |
2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3" | 00000000 | 0000 |
2 1/2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3" | 00000000 | 0000 |
3" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3" | 00000000 | 0000 |
4" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3" | 00000000 | 0000 |
6" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3" | 00000000 | 00000 |
Five Ply—0.213" Thick. | |||||||
1 1/4" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3 1/2" | 00000000 | 0000 |
1 1/2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3 1/2" | 00000000 | 0000 |
2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3 1/2" | 00000000 | 0000 |
2 1/2" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3 1/2" | 00000000 | 0000 |
3" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3 1/2" | 00000000 | 0000 |
4" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3 1/2" | 00000000 | 00000 |
6" | -0.125" to 0.125" | SBR Rubber | Cotton | Brown | 3 1/2" | 00000000 | 00000 |
Heavy Duty Extended-Life Leather Flat Belting


Also known as center-stock belting, this belting resists permanent stretch and has excellent resistance to oil, which gives it a long service life. To join ends, use alligator belt lacing.
Wd. | For Min. Pulley Dia. | Material | Color | Per Ft. | |
One Ply—5/32" Thick. | |||||
---|---|---|---|---|---|
1/2" | 3" | Leather | Brown | 0000000 | 00000 |
3/4" | 3" | Leather | Brown | 0000000 | 00000 |
1" | 3" | Leather | Brown | 0000000 | 00000 |
1 1/4" | 3" | Leather | Brown | 0000000 | 00000 |
1 1/2" | 3" | Leather | Brown | 0000000 | 00000 |
2" | 3" | Leather | Brown | 0000000 | 00000 |
2 1/2" | 3" | Leather | Brown | 0000000 | 00000 |
3" | 3" | Leather | Brown | 0000000 | 00000 |
4" | 3" | Leather | Brown | 0000000 | 00000 |
One Ply—3/16" Thick. | |||||
1/2" | 5" | Leather | Brown | 0000000 | 0000 |
3/4" | 5" | Leather | Brown | 0000000 | 00000 |
1" | 5" | Leather | Brown | 0000000 | 00000 |
1 1/4" | 5" | Leather | Brown | 0000000 | 00000 |
1 1/2" | 5" | Leather | Brown | 0000000 | 00000 |
2" | 5" | Leather | Brown | 0000000 | 00000 |
2 1/2" | 5" | Leather | Brown | 0000000 | 00000 |
3" | 5" | Leather | Brown | 0000000 | 00000 |
4" | 5" | Leather | Brown | 0000000 | 00000 |
6" | 5" | Leather | Brown | 0000000 | 00000 |
Two Ply—7/32" Thick. | |||||
1/2" | 5" | Leather | Brown | 0000000 | 00000 |
3/4" | 5" | Leather | Brown | 0000000 | 00000 |
1" | 5" | Leather | Brown | 0000000 | 00000 |
1 1/4" | 5" | Leather | Brown | 0000000 | 00000 |
1 1/2" | 5" | Leather | Brown | 0000000 | 00000 |
2" | 5" | Leather | Brown | 0000000 | 00000 |
2 1/2" | 5" | Leather | Brown | 0000000 | 00000 |
3" | 5" | Leather | Brown | 0000000 | 00000 |
4" | 5" | Leather | Brown | 0000000 | 00000 |
Two Ply—17/64" Thick. | |||||
3/4" | 6" | Leather | Brown | 0000000 | 00000 |
1" | 6" | Leather | Brown | 0000000 | 00000 |
1 1/4" | 6" | Leather | Brown | 0000000 | 00000 |
1 1/2" | 6" | Leather | Brown | 0000000 | 00000 |
2" | 6" | Leather | Brown | 0000000 | 00000 |
2 1/2" | 6" | Leather | Brown | 0000000 | 00000 |
3" | 6" | Leather | Brown | 0000000 | 00000 |
4" | 6" | Leather | Brown | 0000000 | 00000 |
Two Ply—11/32" Thick. | |||||
1" | 12" | Leather | Brown | 0000000 | 00000 |
1 1/4" | 12" | Leather | Brown | 0000000 | 00000 |
1 1/2" | 12" | Leather | Brown | 0000000 | 00000 |
2" | 12" | Leather | Brown | 0000000 | 00000 |
2 1/2" | 12" | Leather | Brown | 0000000 | 00000 |
3" | 12" | Leather | Brown | 0000000 | 00000 |
4" | 12" | Leather | Brown | 0000000 | 00000 |
High-Speed Extended-Life Leather Flat Belting

A nylon core allows this belting to handle higher speeds than other leather flat belting. It resists permanent stretch and has excellent resistance to oil, which gives it a long service life. To join ends, use alligator belt lacing.
Wd. | For Min. Pulley Dia. | Material | Core Material | Color | Per Ft. | |
Three Ply—0.17" Thick. | ||||||
---|---|---|---|---|---|---|
1/2" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
3/4" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 0000 |
1" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 0000 |
1 1/4" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
1 1/2" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
2" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
2 1/2" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
3" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
3 1/2" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
4" | 3 5/16" | Leather | Nylon Plastic | Gray | 0000000 | 00000 |
Light Duty Extended-Life Leather Flat Belting

Also known as side-stock belting, this belting resists permanent stretch and has excellent resistance to oil, which gives it a long service life. To join ends, use alligator belt lacing.
Wd. | For Min. Pulley Dia. | Material | Color | Per Ft. | |
One Ply—5/32" Thick. | |||||
---|---|---|---|---|---|
1" | 3" | Leather | Brown | 0000000 | 000000 |
1 1/4" | 3" | Leather | Brown | 0000000 | 00000 |
1 1/2" | 3" | Leather | Brown | 0000000 | 00000 |
2" | 3" | Leather | Brown | 0000000 | 00000 |
2 1/4" | 3" | Leather | Brown | 0000000 | 00000 |
2 1/2" | 3" | Leather | Brown | 0000000 | 00000 |
2 3/4" | 3" | Leather | Brown | 0000000 | 00000 |
3" | 3" | Leather | Brown | 0000000 | 00000 |
4" | 3" | Leather | Brown | 0000000 | 00000 |
6" | 3" | Leather | Brown | 0000000 | 00000 |
Flat Belting

Weld the ends of this belting together for a firm hold. Resistant to chemicals and abrasion, it is often used for light to medium duty power transmission. To weld ends, use a welding kit.
Wd. | Thick. | For Min. Pulley Dia. | Material | Color | Per Ft. | |
3/8" | 0.055" | 3/8" | Polyurethane Rubber | Orange | 0000000 | 00000 |
1/2" | 0.062" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |
5/8" | 0.125" | 1" | Polyurethane Rubber | Orange | 0000000 | 0000 |
5/8" | 0.25" | 2" | Polyurethane Rubber | Orange | 0000000 | 00000 |
3/4" | 0.062" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |
3/4" | 0.078" | 5/8" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1" | 0.09" | 3/4" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1" | 0.125" | 1" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1 1/4" | 0.09" | 3/4" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1 1/2" | 0.09" | 3/4" | Polyurethane Rubber | Orange | 0000000 | 0000 |
1 3/4" | 0.062" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |
2" | 0.062" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |
2" | 0.09" | 3/4" | Polyurethane Rubber | Orange | 0000000 | 00000 |
3" | 0.062" | 1/2" | Polyurethane Rubber | Orange | 0000000 | 0000 |