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Ball Bearings
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Shielded |
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Sealed |
Smoother than smooth—the balls inside these bearings roll nearly friction-free. You’ll often find them on rapidly rotating parts, from the whirring chuck on a power drill to the spinning shaft on an electric motor.
Shielded—The balls are covered just enough to keep out large particles while allowing air to pass through and dissipate heat.
Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.
Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.
ABEC Rating—Bearings with an ABEC rating meet industry tolerance standards established by the Annular Bearing Engineers Committee (ABEC). They're rated on a scale from 1 to 9. The higher the rating, the tighter the tolerance. Bearings rated ABEC 1 or 3 are precise enough for most applications. If your application consistently runs at high speeds or requires high accuracy, consider bearings rated ABEC 5 or higher, since they generate less friction and heat.
Needle-Roller Thrust Bearings
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Bearings | Washers |
Small but mighty, our thinnest rolling thrust bearings slot into tight spaces and spin at whirring speeds. Their long, slender rollers support thrust loads and reduce friction in everything from machine tool spindles to gearboxes.
A cage holds the rollers in place. You can install these bearings without washers between hardened, ground surfaces for the thinnest profile. If you’re working with unhardened, unground surfaces, you’ll need two washers for the rollers to run on. This three-piece design is easy to lubricate, but the oil will attract dust and grime since it’s exposed.
Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.
Washers for Needle-Roller Thrust Bearings
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For Shaft Dia., mm | OD, mm | Thk., mm | Washer Material | Specs. Met | Each | ||
|---|---|---|---|---|---|---|---|
| 150 | 190 | 1 | Steel | DIN 5405-3, ISO 303 | 5909K114 | 0000000 |
Bearing Nuts
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Carbon Steel Chamfered Face |
Often paired with spring lock washers to strengthen their hold, these bearing nuts—also known as shaft nuts—keep vibration from shifting bearings, bushings, pulleys, and gears on your threaded shaft or spindle. They have slotted sides, so you can tighten and loosen them with a spanner wrench or spanner socket.
Carbon Steel—Carbon steel bearing nuts are strong and resist wear.
Chamfered Face—Chamfered-face bearing nuts weigh less and produce less heat than stepped-face nuts.
ISO 2982— Some chamfered-face bearing nuts meet ISO 2982 (formerly DIN 981), an international standard for bearing locknut dimensions. Their sizes correspond to SKF KM series. Use them with DIN 5406 spring lock washers.
Thread Spacing—When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.
