What are the differences between cylindrical roller bearings and needle roller bearings

There are many kinds of bearings, and some of them are somewhat similar, which makes it easy to get confused. For example, cylindrical roller bearings and needle roller bearings, many people are easy to take them wrong when using them. In fact, these two kinds of bearings are different. Today, I would like to introduce the differences between cylindrical roller bearings and needle roller bearings, hoping to help you.

1、 Cylindrical roller bearing

Cylindrical roller bearing belongs to precision bearing. The edge guide of the precisely selected roller shaft ring is composed of cage, roller and guide shaft ring. It can be separated from another bearing ring and belongs to separable bearing. Cylindrical roller bearings are easy to install and disassemble, especially when it is required that the inner and outer rings are interference fit with the shaft and housing. This type of bearing is in line contact with the raceway. Large load capacity, mainly bearing radial load. Only the single row bearing with rib on the inner and outer rings can follow the smaller steady axial load or the larger intermittent axial load; Compared with other accumulators with the same overall dimensions, this kind of bearing has the characteristics of high load, low noise and high speed, and the friction between the rolling element and the ring rib is small, so it is suitable for high-speed rotation. It is very suitable for all kinds of precision machinery and mine rolling machines. However, the shaft, rolling element and other related parts matched with such bearings need to be precision machined.

2、 Needle bearing

Needle roller bearing is a roller bearing with cylindrical rollers. The rollers are thin and long relative to their diameters. This kind of roller is called needle roller. Although it has a small cross section, the bearing still has a high load bearing capacity. Needle roller bearings are equipped with thin and long rollers, so the radial structure is compact. Its inner diameter and load capacity are the same as those of other types of bearings, and its outer diameter is very small. It is especially suitable for supporting structures with limited radial installation size. Needle roller bearings are mainly used in places with limited space, so they are widely used in automobiles, motorcycles and spinning machines. In addition, the inner ring of the needle roller is optional. To put it bluntly, if the hardness and roughness of the shaft meet the requirements, the inner ring may not be equipped. However, if the processing degree of the shaft is relatively low or soft, an additional inner ring is required as the raceway.