A bearing, irrespective of its type, is the most essential component that guides a rotating assembly in a machine, while supporting heavy radial or axial loads or a combination of both loads acting in one direction or both directions. With various types and design variants, you can choose an appropriate bearing depending on the speed, load, rigidity and service life. A needle thrust bearing is one of the most sought-after bearings for the technical advantages it offers. The bearing is known for the compact design envelope, as well as its capacity to support relatively heavy loads. They take minimal axial space and have no raceways; instead, using the adjacent components as raceways. Get to Know the Typical Structure of Needle Thrust Bearing Needle Thrust Bearing When it comes to the design, a needle thrust bearing comes in different design variants. Generally, it consists of a needle cage having needle rolling elements and an inner or outer raceway. The other variations are the needle cage unit, with only a shaft, drawn cup, thrust roller, precision race, and more.
A caged needle thrust bearing help handle radial loads, as well as rotational speeds. These cage types are available in single and double rows to handle different loads. The cage in the bearing holds and guides the rolling elements. Some Inherent Features of Needle Thrust Bearing Smaller in size, a needle thrust bearing is recognized for its unique design of rolling elements, which are of small bore diameter and high length. The other intrinsic characteristics of needle roller bearings are given below: Support heavy axial loads: The bearing has a capacity to accommodate heavy axial and peak loads, with a small deviation in the roller diameters within the assembly. Give long service life: With the ends of the rollers relieved slightly, you can change the line contact between the rings and rolling elements and this helps avoid stress peaks and offers extended service life. High rigidity: The bearing provides high stiffness because of the multiple needle rollers and small “load carriage per unit area”. Types of Needle Thrust Bearings for Different Applications As for the design of a needle thrust bearing, it has undergone several changes, unlike the other bearing design like a taper roller bearing design, to suit different applications. A typical bearing unit consists of needle rollers and cage thrust assemblies. Some types of needle roller bearings have a centering flange. The cages are available in different materials such as plastic, steel and aluminium. Furthermore, these cages come in different constructions such as single split, solid cage and slit halves to allow lubrication passage. They are commonly found in applications such as planetary gear sets, engines of two or four strokes, gear boxes and automobile power transmissions. For more information on a needle thrust bearing, refer a needle bearing catalog.
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