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What are the characteristics of needle roller bearing

Editor: Changzhou Hongshan bearing factory Release Date:2019-10-18 15:16:51  Hits:88   




 

    

There are many types of bearings. Different bearings have different characteristics. What are the characteristics of needle roller bearings? It can accept higher radial load, higher rotating speed, cannot accept axial load, and has higher rigidity.


The general surface of the needle is slightly shortened near the end face. The results of needle roller and raceway line touch correction can be used for needle roller bearing to prevent damaging marginal stress. The supporting roller needle bearing is a thick wall outer ring. After high temperature and high nitrogen quenching, the high-precision sorted roller is guided by the edge of the high-rigid outer ring. With linear touch, the roller can be easily transformed on the raceway and can accept large loads. In order to remove the stress, the outer ring of the supporting roller is described by arc surface. The curve roller has various specifications and models with single or double sealing ring, without sealing ring, with sealing ring, etc.




The needle roller bearing is equipped with thin and long rollers, the roller length is three to ten times of the diameter, and the diameter is usually not more than 5mm, so the radial layout is compact, and its inner diameter and load can be the same as other types of bearings, and the outer diameter is the most. According to the different application occasions, the bearing or needle roller and cage assembly without inner ring can be selected. At the moment, the external surface of the journal and the external surface of the housing hole matched with the bearing are directly used as the internal and external rolling surface of the bearing. In order to ensure that the load ability and working performance are the same as that of the bearing with ferrule, the hardness, processing accuracy and external quality of the external surface of the shaft or housing hole raceway should be similar to that of the raceway of the bearing ferrule. 。 This kind of bearing can only accept radial load.

The types of needle roller bearings, in addition to those listed in the catalog, can be used for general engineering bearings, such as: open stamping outer ring needle roller bearings. There are cage and no cage filled with needle bearing, closed stamping outer ring needle bearing, and no inner ring needle bearing / no inner ring cage needle bearing, with inner ring needle bearing, SKF can also supply various types of needle bearing.

Needle bearing without flange, combined needle / ball bearing, needle cage assembly, self-aligning needle bearing, combined needle / thrust ball bearing. Combined needle / cylindrical roller thrust bearing, stamping outer ring needle bearing. The needle bearing of stamping outer ring is a needle bearing with thin stamping outer ring. Its primary characteristic is that the section height is very low and the load can be high. It is mainly used for bearing equipment with compact layout, low price and the hole in the bearing box can not be used as the raceway of needle cage assembly.

The combined needle roller bearing is a bearing unit composed of the radial needle roller bearing and the thrust bearing components, with a compact layout and volume. Moreover, the product layout is diverse, adaptable and easy to install. Combined needle roller bearings are widely used in machine tools, metallurgical machinery, textile machinery, printing machinery and other mechanical equipment, and can make the mechanical system described very compact and flexible.


 

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