Needle Roller Bearings

Needle roller bearings are roller bearings with cylindrical rollers that are small in diameter. In spite of their low cross section, needle roller bearings have a high load carrying capacity and are therefore extremely suitable for bearing arrangements where radial space is limited.

Drawn Cup Needle Roller Bearings

Drawn cup needle bearings are designed to support radial loads and reduce friction between rotating components. The low cross section provides maximum load-carrying capability with a minimum of space required. Drawn cup bearings are easily installed with a press fit in the housing.

There are two basic designs: the full complement and the caged version. Both have a drawn outer shell that serves as a raceway for the rollers contained in the bearing. The full complement version has the maximum number of rollers mechanically retained by the drawn outer shell. This design combines high radial load-carrying capability with low cost. The standard caged version contains a one-piece steel cage to guide and retain the rollers. This design provides high speed and maximum lubricant retention capability.

• Integral seals
• Side flanges (or separate end washers)
• Inner rings
• Oil holes
• Single or double caged sets (or full complement) of rollers

Roller and Cage Assemblies

Needle roller and cage assemblies have a complement of needle rollers held in place by a cage. With no inner or outer ring, the low cross section provides maximum load-carrying capability within the smallest envelope. The mating shaft and housing are normally used as inner and outer raceways.

A variety of cage designs, styles and materials, as well as multiple roller paths and segmented construction, meet broad application requirements.

Heavy-Duty (Machined Race)

Heavy-duty needle roller bearings have a machined and ground channel-shaped outer ring with a complement of needle rollers retained and guided by a cage. The thick outer ring provides maximum load capacity and shock resistance with a relatively small radial cross section.

With the high-strength cage retaining and guiding the rollers, this design provides high speed and lubrication retention capability. A lubrication groove and hole in the O.D. facilitate relubrication through the outer ring. These bearings can be used with or without a machined and ground inner ring depending on the suitability of the shaft as a raceway surface.

• High-strength cage retains and guides rollers
• High speed and lubrication-retention capability. A lubrication groove and hole in the O.D. facilitate relubrication through the outer ring.
• Bearings can be used with or without a machined and ground inner ring depending on the suitability of the shaft as a raceway surface.

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