About Ball and Roller Bearings
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Ball Bearings
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. | |||||||||||||
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Bearing Trade Number | For Shaft Dia. | For Housing ID | Wd. | Ring Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | ABEC Rating | Specifications Met | Each | |
6306 | 30mm | 72mm | 19mm | Steel | 6,500 | 3,600 | 13,700 | Lubricated | -20° to 230° | ABEC-1 | DIN 625-1 | 00000000 | 000000 |
Radial Load Cap., lbs. | |||||||||||||
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Bearing Trade Number | For Shaft Dia. | For Housing ID | Wd. | Ring Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | ABEC Rating | Specifications Met | Each | |
6208-2Z | 40mm | 80mm | 18mm | Steel | 6,500 | 4,000 | 8,500 | Lubricated | -20° to 230° | ABEC-1 | DIN 625-1 | 00000000 | 000000 |
6306-2Z | 30mm | 72mm | 19mm | Steel | 6,500 | 3,600 | 9,500 | Lubricated | -20° to 230° | ABEC-1 | DIN 625-1 | 00000000 | 00000 |
Radial Load Cap., lbs. | |||||||||||||
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Bearing Trade Number | For Shaft Dia. | For Housing ID | Wd. | Ring Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | ABEC Rating | Specifications Met | Each | |
6208-2RS | 40mm | 80mm | 18mm | Steel | 6,500 | 4,000 | 5,000 | Lubricated | -20° to 230° | ABEC-1 | DIN 625-1 | 0000000 | 000000 |
6306-2RS | 30mm | 72mm | 19mm | Steel | 6,500 | 3,600 | 6,000 | Lubricated | -20° to 230° | ABEC-1 | DIN 625-1 | 0000000 | 00000 |
Electrically Insulated Ball Bearings
Good for use in electric motors and power generators, these bearings have ceramic balls that insulate against stray current to prevent damage to the bearing. The ceramic balls generate less heat than steel balls, so they require lubrication less frequently.
Shielded bearings block out dust and other contaminants.
For technical drawings and 3-D models, click on a part number.
Radial Load Cap., lbs. | ||||||||||||
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Bearing Trade Number | For Shaft Dia., mm | For Housing ID, mm | Wd., mm | Ring Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | ABEC Rating | Each | |
Shielded | ||||||||||||
6208-2Z | 40 | 80 | 18 | Steel | 6,500 | 3,400 | 12,000 | Lubricated | -20° to 250° | ABEC-1 | 0000000 | 0000000 |
Stainless Steel Ball Bearings
Bearings are 440C stainless steel for good corrosion resistance.
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 | |
6208-2RS | 40mm | 80mm | 18mm | 440C Stainless Steel | 6,500 | 4,000 | 5,200 | Lubricated | -20° to 210° | ABEC-1 | 00000000 | 0000000 |
Set Screw Collar Ball Bearings
Slip these bearings onto a shaft and secure with the included set screws, no special tools required. All have an extended inner ring for additional shaft support.
Bearings with a black-oxide steel ring have some corrosion resistance.
Sealed bearings block out dust and other contaminants better than shielded bearings.
Bearings with a retaining ring have a removable retaining ring that holds the bearing inside a housing.
For technical drawings and 3-D models, click on a part number.
Inner Ring | Retaining Ring | Radial Load Cap., lbs. | ||||||||||||
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Bearing Trade Number | For Shaft Dia. | For Housing ID | Wd. | OD | Wd. | OD | Thick. | Dynamic | Static | Max. Speed, rpm | Temp. Range, °F | ABEC Rating | Each | |
Sealed (Lubricated) | ||||||||||||||
Black-Oxide Steel—With Retaining Ring | ||||||||||||||
ER24 | 1 1/2" | 3.1496" | 1 3/32" | 2.048" | 1.938" | 3.406" | 0.062" | 6,500 | 4,000 | 5,000 | -20° to 250° | Not Rated | 0000000 | 0000000 |
Tapered-Roller Bearings
Found anywhere from machine tool spindles to conveyor rollers, these bearings have a two-piece design that allows for adjustment.
For technical drawings and 3-D models, click on a part number.
Radial Load Cap., lbs. | Thrust Load Cap., lbs. | |||||||||||
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For Shaft Dia. | For Housing ID | Wd. | Bearing Trade Number | Dynamic | Static | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | Each | |
Steel Ring | ||||||||||||
Open | ||||||||||||
70mm | 110mm | 19mm | 32014 | 6,500 | 36,600 | 4,850 | 46,500 | 1,500 | Required | -60° to 200° | 0000000 | 0000000 |
Extra-Clearance Mounted Ball Bearings
Keep shafts, such as those with a shoulder, clear of the mounting surface. These bearings have a higher mounting base that gives them more space to the mounting surface than standard mounting bases. All have a set screw for securing them to shafts without having to use a collar. The screw lets shafts rotate in both directions, so they’re good for applications where you need to reverse.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting | Radial Load Cap., lbs. | |||||||||||||
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For Shaft Dia. | Center Ht. | Ht. | Lg. | Wd. | Hole Lg. | Hole Wd. | Hole Ctr.-to-Ctr. | Dynamic | Static | Max. Speed, rpm | Temp. Range, °F | Alignment Style | Lubrication | Each | |
Sealed Steel Bearings with Cast Iron Housing | |||||||||||||||
Shaft Mount Type: Set Screw | |||||||||||||||
1 1/2" | 3 15/16" | 5 29/32" | 7 1/4" | 2 3/4" | 13/16" | 21/32" | 5 13/32" | 6,500 | 4,000 | 3,000 | 0° to 210° | Self Aligning | Lubricated | 0000000 | 000000 |
1 9/16" | 3 15/16" | 5 29/32" | 7 1/4" | 2 3/4" | 13/16" | 21/32" | 5 13/32" | 6,500 | 4,000 | 3,000 | 0° to 210° | Self Aligning | Lubricated | 0000000 | 00000 |
Easy-Align Mounted Ball Bearings with Two-Bolt Flange
An elongated mounting hole on one side of the flange lets you adjust the position of these bearings without having to remove your shaft. You only need to loosen the bolt instead of removing it to adjust. They’re self-aligning to compensate for shaft misalignment.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting | Radial Load Cap., lbs. | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Ht. | Lg. | Wd. | Flange Thick. | Hole Dia. | Hole Lg. | Hole Ctr.-to-Ctr. | Dynamic | Static | Max. Speed, rpm | Temp. Range, ° F | Alignment Style | Lubrication | Each | |
Sealed Steel Bearings with Cast Iron Housing | |||||||||||||||
Shaft Mount Type: Set Screw | |||||||||||||||
1 1/2" | 4 1/8" | 6 23/32" | 2" | 9/16" | 33/64" | 2 3/4" | 5 43/64" | 6,500 | 4,000 | 3,000 | 0° to 210° | Self Aligning | Lubricated | 0000000 | 000000 |
1 9/16" | 4 1/8" | 6 23/32" | 2" | 9/16" | 33/64" | 2 3/4" | 5 43/64" | 6,500 | 4,000 | 3,000 | 0° to 210° | Self Aligning | Lubricated | 0000000 | 00000 |
Mounted Bearings with Three-Bolt Flange
Bearings are self-aligning to compensate for shaft misalignment. Seals block out dust and contaminants.
Steel bearings are stronger than stainless steel bearings, but not as corrosion resistant.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting | Radial Load Cap., lbs. | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Center Ht. | Ht. | Lg. | Wd. | Flange Thick. | Hole Dia. | Hole Ctr.-to-Ctr. Lg. | Hole Ctr.-to-Ctr. Ht. | Dynamic | Static | Max. Speed, rpm | Temp. Range, °F | Each | |
Sealed Steel Ball Bearings with Nickel-Plated Cast Iron Housing—Self Aligning | ||||||||||||||
Shaft Mount Type: Set Screw | ||||||||||||||
1 1/2" | 3 31/32" | 6 15/32" | 3 15/16" | 1 31/32" | 5/8" | 7/16" | 1 31/32" | 1 39/64" | 6,500 | 4,000 | 3,000 | 0° to 210° | 0000000 | 000000 |