Needle roller bearings are cylindrical roller bearings. Relative to their diameter, the rollers are thin and long. This roller is called a 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. When the inner diameter size and load capacity are the same as other types of bearings, Minimal, especially suitable for support structures with restricted radial installation dimensions.
Drawn cup needle roller bearings with open ends (1) Enclosed drawn cup needle roller bearings (2) Needle roller bearings with inner ring (3) and needle roller bearings without inner ring / needle roller bearings without inner ring without cage (4) Needle roller bearings with and without cages (5) SKF can also supply various types of needle roller bearings, 1. Needle roller cage assembly 2. Needle roller bearings without ribs 3. Self-alignment 4.Combined needle roller / ball bearings 5.Combined needle roller / thrust ball bearings 6. Combined needle roller / cylindrical roller thrust bearing.
Needle roller bearings are equipped with thin and long rollers, so the radial structure is compact. When the inner diameter size and load capacity are the same as those of other types of bearings, the outer diameter is the smallest, which is especially suitable for support structures with limited radial installation dimensions. Needle roller bearings are used in different applications. The machining accuracy and surface quality should be combined with the bearing rings and applications. Needle roller bearings are bearing units that combine radial needle roller bearings and thrust bearing components.
1. The friction coefficient of rolling bearing is smaller than that of sliding bearing, and the transmission efficiency is high. The friction coefficient of general sliding bearings is 0.08-0.12, while the friction coefficient of rolling bearings is only 0.001-0.005; 2. Rolling bearings have been standardized, serialized and generalized, suitable for mass production and supply, and easy to use and maintain; 3． Rolling bearings are made of bearing steel and are heat treated.Therefore, rolling bearings not only have high mechanical properties and long service life, but also can save the expensive non-ferrous metals used in the manufacture of sliding bearings; 4． The internal clearance of the rolling bearing is small, and the machining accuracy of each part is high, so the running accuracy is high. At the same time, the rigidity of the bearing can be increased by pre-loading. This is very important for precision machinery; 5． Some rolling bearings can support both radial and axial loads, so the structure of the bearing support can be simplified; 6. Because the rolling bearing has high transmission efficiency and less heat generation, it can reduce the consumption of lubricating oil and save maintenance. 7. Rolling bearings can be easily applied to shafts in any orientation in space.