About Ball and Roller Bearings
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Light Duty Ball Bearings
Use these bearings where high speed and precision are not a concern.
Open bearings dissipate heat more efficiently than shielded and sealed bearings.
Shielded bearings block out dust and other contaminants, but do not dissipate heat as efficiently as open bearings.
Sealed bearings block out dust and other contaminants better than open and shielded bearings, but retain the most heat.
For technical drawings and 3-D models, click on a part number.
Radial Load Cap., lbs. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bearing Trade Number  | For Shaft Dia. | For Housing ID | Wd. | Ring Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | ABEC Rating | Each | |
Open | ||||||||||||
| 3021 | 1/2" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 000000 |
| 3023 | 5/8" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
Shielded | ||||||||||||
| 3020-2Z | 7/16" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
| 3021-2Z | 1/2" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
| 3022-2Z | 9/16" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
| 3023-2Z | 5/8" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
Sealed | ||||||||||||
| 3020-2RS | 7/16" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
| 3021-2RS | 1/2" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
| 3022-2RS | 9/16" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
| 3023-2RS | 5/8" | 1 3/8" | 7/16" | Steel | 940 | 850 | 2,500 | Lubricated | -20° to 250° | Not Rated | 0000000 | 00000 |
One-Way Locking Needle-Roller Bearing Clutches
The needles in these bearings roll freely in one direction, but lock to transmit torque when the rotation of the shaft is reversed. Also known as drawn-cup roller clutches. An arrow on the lip indicates the rotational direction that locks the bearings.
Triple-row bearings support radial loads.
Bearings with 301 stainless steel springs handle higher temperatures than bearings with acetal springs.
For technical drawings and 3-D models, click on a part number.
Radial Load Cap., lbs. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | For Housing ID | Wd. | Ring Material | Dynamic | Static | Max. Speed, rpm | Max. Torque, ft.-lbs. | Lubrication | For Shaft Surface Smoothness (Ra), microinch | Temp. Range, °F | Each | |
Triple Row | ||||||||||||
301 Stainless Steel Springs | ||||||||||||
| 8mm | 14mm | 20mm | Steel | 940 | 680 | 21,000 | 3.2 | Required | 16 | -20° to 250° | 0000000 | 000000 |