Needle roller bearings are roller bearings with cylindrical rollers. Relative to its diameter, the rollers are both ...
Needle roller bearings are roller bearings with cylindrical rollers. Relative to its diameter, the rollers are both thin and long. This kind of roller is called a needle roller. Although the bearing has a small cross-section, the bearing still has a high load-bearing ability. The needle roller bearing is equipped with thin and long rollers (roller diameter D≤5mm, L/D≥2.5, L is the roller length), so The radial structure is compact.
When its inner diameter size and load capacity are the same as other types of bearings, it is especially suitable for supporting structures with limited radial installation dimensions. According to different applications, bearings without inner ring or needle roller and holding frame components can be selected. The matching journal surface and shell hole surface directly serve as the inner and outer rolling surfaces of the bearing.
In order to ensure that the load capacity and running performance are the same as those of bearings with ferrules, in addition to the bearings listed in the catalog, which can be used for ordinary engineering, needle roller bearings can be divided into the following categories according to their structure: closed stamped outer ring needle roller inner ring Needle roller bearings and needle roller bearings without inner ring/needle roller bearings without inner ring and cage.
There are holders and no holders filled with needle roller bearings, needle roller bearings without ribs, self-aligning needle roller bearings, combined needle/ball bearings and needle roller bearings with knurled outer rings, which are also in use The medium is more conducive to bearing positioning. Bearings of this size can only bear radial loads.