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Needle Bearing

Needle Bearing

2020-04-08

Needle bearings feature a smaller cross-section, higher load-carrying capacity, greater rigidity, and lower inertia forces that facilitate size and weight reductions in machinery. They’re designed to withstand oscillation, perform under severe conditions, and interchange with sliding bearings.

Diverse types of needle bearings are available in a wide variety of sizes and tolerances, for a multitude of applications.

Needle roller and cage assemblies are offered in single or double row, solid or split cage, metric and inch sizes; as well as in connecting rod bearings for special applications.

Single and double row bearings are available with or without ribs, and with or without inner rings.

Thrust bearings are offered in single row roller and cage assemblies.

Yoke and stud type track rollers are also available.

   


Needle Roller Bearings

Needle roller bearings have relatively small diameter cylindrical rolling elements whose length is much larger than their diameter. Compared with other types of rolling bearings, needle roller bearings have a small cross-sectional height and significant load-bearing capacity and rigidity relative to their volume. Also, because the inertial forces acting on them is limited, they are an ideal choice for applications with oscillating motion. Needle roller bearings also work well in compact and lightweight machine designs and they serve as a ready replacement for sliding bearings. We offers several different types of needle roller bearings

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A needle roller and cage assembly includes needle rollers and a cage that guides and retains the rollers. ¡These assemblies use both the shaft and housing as raceway surfaces. Consequently, the cross-sectional thickness of the assembly is small, roughly equivalent to the diameter of the needle rollers. ¡Because this bearing type has no inner or outer rings, the installation is much easier. ¡These assemblies are available in both singlerow and double-row configurations. ¡As long as the tolerance limits of the shaft and housing are satisfied, the bearing radial internal clearance can be adjusted.

A needle roller and cage assembly for connecting rods includes needle rollers and a cage that guides and retains the rollers. This bearing type is used for connecting rods in compact and mid-sized internal combustion engines (e.g. outboard engines and multipurpose engines), as well as reciprocating compressors.

This product boasts a unique light-weight high-strength design to cope with crank motion involving the simultaneous rotation and revolution on the large-end side of connecting rod. At the same time, the outer diameter of the cage surface is precision-finished so that the assembly maintains the appropriate cage-riding clearance. ¡The cage is made of high-tensile special steel with a surface hardened treatment. ¡The assembly uses an outer diameter-guided system. ¡If an application has poor lubrication, the cage can be protected with a surface treatment using a non-ferrous metal. ¡For applications with a one-piece crank shaft, split-type cage design is also available.


The small end of connecting rods are subjected to high impact loads and high-speed oscillation. To address this condition, these bearings boast a unique light-weight high-strength design. In addition the cage bore surface is precision-finished so that the assembly maintains an appropriate cage-riding clearance. ¡The cage is made from high tensile special steel and the cage surface is hardened. ¡The cage is bore-guided and the guide surface is designed to be as long as possible to minimize surface pressure. ¡Rollers with the longest possible length are used, At the same time, the maximum number of smaller diameter rollers are incorporated in order to reduce the contract pressure on the rollers.


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