Where a rotating assembly needs to be guided, you need a mechanical component like a bearing to facilitate the movement of a machine part relative to another. In the process, it supports either heavy axial or radial loads or a combination of both at different speed levels. The choice of a bearing depends on its use in applications and based on the load, rigidity and service life it is classified. A needle thrust bearing is one among the several popular types of bearing used in industry, where a high degree of stiffness is required. While occupying the minimal axial space, these types of bearings use the nearby components as raceways. They do not need much space and can prevent stress peaks during operation. Why Choose a Needle Thrust Bearing? Needle Thrust Bearing | Image Resource : shutterstock.com A needle thrust bearing is known for its unique design, which is that of the roller having high length and small diameter. The other important characteristics of this bearing are:
Can handle heavy axial loads and peak loads: With a small deviation in the diameter of the rolling elements within the assembly enables the bearing to support heavy axial, as well as peak loads. Offers extended service life: To modify the line contact between the rollers and raceways, the rolling element ends are relieved slightly to avoid stress peaks. This gives the bearing a long service life. High rigidity: Needle thrust bearings give high rigidity due to the large number of rollers and smaller load carriage per unit area. Get to Know Different Types of Needle Thrust Bearings and their Uses A needle thrust bearing design, unlike a taper roller bearing design, is different to facilitate its use in certain applications. The bearing unit come in needle rolling elements and cage thrust assemblies and sometimes with a centering flange. The needle-like shaped rolling elements are of a diameter 5 mm or less, while their length is longer by three times. The bearing however requires less space by using the adjacent components as washers. Their use is found in various industries such as automobiles, motors and pumps, construction machines, and in engineering tools like drills, crankshaft and chainsaws due to the robustness and durability they offer. There are two common types of needle roller bearings and they are a “needle roller bearing, with cage-assembly” and “full-complement needle roller bearing”. Where you have a little space on the shaft, you can use the former for it can use the nearby components as raceways. A specific hardness and roughness of the rolling surfaces make the design of this types of bearing. Nevertheless, you can choose an appropriate needle thrust bearing by referring a needle bearing catalogue, which provides all the details.
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