The rolling elements are cylindrical roller radial bearings. The internal structure of the cylindrical roller bearing adopts rollers arranged in parallel, with spacers or spacers installed between the rollers, which can prevent the tilting of the rollers or the friction between the rollers, which effectively prevents the increase of the rotating torque.
Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the ferrule is small, suitable for high-speed rotation.
According to the presence or absence of ribs, it can be divided into NU, NJ, NUP, N, NF and other single-row cylindrical roller bearings, and NNU, NN and other double-row cylindrical roller bearings. The bearing has a separable inner ring and outer ring structure.
Cylindrical roller bearings with no ribs on the inner or outer ring can move axially relative to the inner and outer rings, so they can be used as free-end bearings.
Cylindrical roller bearings with double ribs on one side of the inner ring and outer ring and single ribs on the other side of the ring can withstand a certain degree of axial load in one direction. Generally use steel stamping cage, or copper alloy car body cage. But some also use polyamide shaped cages.
Feature
1. The roller and the raceway are in line contact or underline contact. The radial load capacity is large, and it is suitable for bearing heavy loads and impact loads.
2. The friction coefficient is small, suitable for high speed, and the limit speed is close to the deep groove ball bearing.
3. The N-type and NU-type can move axially, can adapt to the change of the relative position of the shaft and the casing caused by thermal expansion or installation error, and can be used as a free end support.
4. The processing requirements of the shaft or the seat hole are relatively high. The relative deflection of the outer ring axis after the bearing is installed must be strictly controlled to avoid concentration of contact stress.
5. The inner or outer ring can be separated for easy installation and removal.
Post time: Jan-08-2022