Cylindrical Roller Bearings

Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the collar of the ferrule is small, which is suitable for high-speed rotation. Depending on whether the ring has ribs, it can be divided into single-row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double-row cylindrical roller bearings such as NNU, NN. The bearing has a separable inner and outer ring structure.

Cylindrical roller bearings with no ribs on the inner or outer ring, the inner and outer rings can move relatively in the axial direction, 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 a single rib on the other side of the ring can withstand a certain degree of axial load in one direction. Steel stamped cages or copper alloy solid cages are generally used. However, some use polyamide molding cages.

1. Roller and raceway are in line contact or repaired line contact, with large radial bearing capacity, suitable for bearing heavy load and impact load.

2. The friction coefficient is small, suitable for high speed, and the limiting speed is close to the deep groove ball bearing.

3. N type and NU type can move axially, can adapt to the change of the relative position of the shaft and the housing caused by thermal expansion or installation error, and can be used as free end support.

4. The machining requirements for the shaft or seat hole are high. The relative deflection of the outer ring axis after the bearing is installed must be strictly controlled to avoid causing contact stress concentration.

5. The inner or outer ring can be separated for easy installation and removal

Cylindrical rollers are in linear contact with the raceways and have a large radial load capacity. It is suitable for both heavy and shock loads and high-speed rotation.

Cylindrical roller bearing raceways and rolling bodies are geometrically shaped. After the improved design, it has a higher load carrying capacity. The new structural design of the flange and roller end faces not only improves the axial bearing capacity of the bearing, but also improves the lubrication conditions of the contact area between the roller end face and the flange. Bearing performance.