Needle Roller Bearings - Inch and Metric

Needle roller bearings are essentially cylindrical roller bearings except that their cylindrical rollers have a length 3 to 10 times their diameter (versus less a length less than 3 times their diameter). Therefore, the ratio of the bearing outside diameter to the inscribed circle diameter is small, and they have a rather high radial load capacity. Even though they have a low cross section, needle roller bearings have a high radial load capacity and are exceptionally apt for bearing applications where radial space is limited.

There are numerous types available, and many have no inner rings. The drawn-cup type has a pressed steel outer ring and the precision (solid) type has a machined outer ring. There are also cage-and-roller assemblies without rings. Most bearings have pressed steel cages, but some are without cages.

Drawn cup needle roller bearings have a drawn outer shell serving as a raceway for the rollers and are installed with a press fit in the housing. They are ideal for many of the following applications: transmissions, transfer cases, engines, valve trains, steering and braking systems, axle supports, outboard engines, textile industry, power tools, copiers, fax machines, paper-moving equipment, and appliances.

Needle Roller Bearings Available from AST Bearings

• SCE and SCE-PP Series - Drawn cup needle roller bearing, Open ends for through shafts, cage guided, with/without seals, Inch dimensional

• HK, and HK-RS Series - Drawn cup needle roller bearing, Open ends for through shafts, cage guided, with/without seals, Metric dimensional

• BCE and BCE-P Series - Drawn cup needle roller bearing, One end closed for shaft ends, cage guided, with/without seals, Inch dimensional

• BK, and BK-RS Series - Drawn cup needle roller bearing, One end closed for shaft ends, cage guided, with/without seals, Metric dimensional

Precision Needle Roller Bearings Also Available

Separate from standard needle roller bearings, AST Bearings has a full line of "precision" needle roller bearings to choose from. If your application requires higher precision, check out our Precision Needle Roller Bearings.

How To Select and Order Needle Roller Bearings

AST Bearings has over 325 needle roller bearing products in its interactive online catalog. If you need help in selecting the best products for your particular application, please remember that design engineering and application assistance are available from AST as part of our value-added services designed to make your job easier.

Click here to go to our online catalog and product specifier for Needle Roller Bearings including free CAD downloads.

Needle Roller Bearings Catalog & CAD Library