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What is Needle Roller Bearings

wallpapers News 2021-03-09
Introduction
Needle roller bearings are roller bearings with cylindrical rollers. The rollers are thin and long relative to their diameter. This kind of roller is called a needle roller. Despite having a small cross-section, the bearing still has a high load bearing capacity.
Compared
1. The friction coefficient of the rolling bearing
is smaller than that of the sliding bearing, and the transmission efficiency is high.
2. Rolling bearings have achieved standardization, serialization, and generalization, which are suitable for mass production and supply, and are very convenient to use and maintain.
3. The deep groove ball bearing does not require maintenance during the working period, and it is a kind of bearing with a lower price and a wide range of uses.
Types of Needle roller
Stamped outer ring: The drawn outer ring needle roller bearing is a needle roller bearing with a thin stamped and formed outer ring. Its main feature is that the section height is very low and the load bearing capacity is high.
Entity ferrule: The entity ferrule needle roller bearing is composed of one or two ferrules and a needle roller set with a cage. According to different applications, it can be divided into bearings with inner ring or without inner ring. Therefore, the solid ferrule needle roller bearing can meet the requirements of light weight, small space occupation and high transmission power.
Advantage
Needle roller bearings are equipped with thin and long rollers (the length of the roller is 3-10 times the diameter, and the diameter is generally not greater than 5mm), so the radial structure is compact, and its inner diameter and load capacity are the same as other types of bearings. The smallest diameter, especially suitable for supporting structures with limited radial installation dimensions. Needle roller bearings are used in different occasions, and the machining accuracy and surface quality should be combined with the bearing ring and purpose. The needle roller bearing is a bearing unit composed of a radial needle roller bearing and a thrust bearing component.

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