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About Ball and Roller Bearings
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Permanently Lubricated Stainless Steel Ball Bearings

A solid polymer lubricant surrounds the balls, eliminating the need for additional lubrication. The solid lubricant blocks out water and dust, extending the life of the bearing.
Metric Bearings
Radial Load Cap., lbs. | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | |
Open | ||||||||||||
638 | 8 | 28 | 9 | 440C Stainless Steel | 1,000 | 440 | 16,000 | Lubricated | -10° to 200° | ABEC-1 | 00000000 | 000000 |
Ultra-Corrosion-Resistant Stainless Steel Ball Bearings

These 316 stainless steel bearings are more corrosion resistant than our other stainless steel bearings, but they have a lower load capacity.
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 | ||||||||||||
638 | 8mm | 28mm | 9mm | 316 Stainless Steel | 160 | 120 | 1,140 | Required | -40° to 140° | Not Rated | 00000000 | 000000 |
Plastic Ball Bearings

These acetal bearings have good all-around corrosion and chemical resistance.
316 stainless steel balls have excellent corrosion resistance.
Radial Load Cap., lbs. | 316 Stainless Steel Ball | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | ||||||||||||
638 | 8mm | 28mm | 9mm | Acetal Plastic | 55 | 43 | 1,142 | Not Required | -40° to 180° | Not Rated | 00000000 | 000000 |