What are the characteristics of needle roller bearings

There are many types of bearings, different bearings have different characteristics, what are the characteristics of needle roller bearings? Can accept high radial load, high speed, can not accept axial load, high rigidity.

The general surface of the needle roller is slightly shortened at the proximal end surface. Needle roller and raceway line touch marking results can be needle roller bearings to prevent the occurrence of damaging marginal stresses. The supporting roller needle roller bearing is a thick-walled outer ring. After quenching at high temperature and high nitrogen, the high-precision sorted rollers are guided by the ribs of the high-rigidity outer ring. With linear touch, the rollers can be easily changed directly on the raceway and can accept huge loads. In order to remove the stress, the outer ring of the supporting roller is depicted by arc surface. The curved roller has various specifications and models with single and double sealing rings, without sealing rings and with sealing rings.

Needle roller bearings are equipped with thin and long rollers. The length of the rollers is three to ten times the diameter, and the diameter is usually not more than 5mm, so the radial layout is compact. When the inner diameter scale and load can be the same as other types of bearings, the outer diameter is the most. According to different application occasions, bearings without inner ring or needle roller and cage components can be selected. At this moment, the journal appearance and shell hole appearance matched with the bearing are directly used as the inner and outer rolling appearance of the bearing. In order to ensure the load ability and working performance are the same as those of the bearing with ring, the hardness, machining accuracy and appearance quality of the raceway of the shaft or shell hole should be similar to those of the bearing ring. Such bearings can only accept radial loads.

The types of needle roller bearings, in addition to the type listed in the catalog, can be used for bearings in general engineering, such as: open type stamped outer ring needle roller bearings. Full needle roller bearings with cage and without cage, closed stamped needle roller bearings with outer ring, needle roller bearings without inner ring/needle roller bearings without inner ring without cage, needle roller bearings with inner ring, SKF can also supply various types of needle roller bearings.

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

The combined needle roller bearing is a bearing unit composed of a radial needle roller bearing and a thrust bearing component, with a compact layout. Moreover, the product layout has various forms, wide adaptability and easy installation. Combined needle roller bearings are widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery and printing machinery, and can make the mechanical system very compact and flexible.