Double row cylindrical roller bearings
Cylindrical roller bearings without ribs on the inner or outer ring, the inner and outer rings can move relative to 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. Generally, a steel stamping cage is used, or a copper alloy turning solid cage is used. However, there are also part of the use of polyamide forming cage.
Product Description
cylindrical roller bearings
Single row cylindrical roller bearings
Four row cylindrical roller bearings
Double row cylindrical roller bearings with tapered bore are matched with tapered shaft neck of spindles. During the processes of bearing assembly, the axial movement of inner ring can swell the inner ring, and then the internal radial clearance can be changed and the bearing preload will be acheived.
As for the N10 and NN30 series of cylindrical roller bearings, the inner ring has shoulder, the outer ring can be separated. For double row cylindrical roller bearings used with oil lubrication, a circumferential oil groove and three symmetric lubricant holes are set in the middle of outer ring, marked W33.
N type:
The inner ring has two integral flanges and the outer ring is without flanges. Axial displacement of the shaft with respect to the housing can be accommodated in both directions within the bearing itself. The bearings are therefore used as non-locating bearings.
NU type:
The outer ring of bearings of the NU design has two integral flanges and the inner ring is without flanges. Axial displacement of the shaft with respect to the housing can be accommodated in both directions within the bearing itself.
NJ type:
The outer ring has two integral flanges and the inner ring one integral flange. The bearings are therefore suitable for the axial location of a shaft in one direction.
NF type:
The outer ring has one integral flange and the inner ring two integral flanges.
NUP type:
The outer ring has two integral flanges and the inner ring one integral flange and one non-integral flange in the form of a loose flange ring. The bearings can be used as locating bearings, i.e. they can provide axial location for a shaft in both directions.
RN type:
No outer ring and the inner ring two integral flanges.
NN type:
NN type bearing without ribs on outer ring,there is a wall in the midel of between both sides of inner ring. It can make shaft relative bearing between the axial displacement generated in both directions.
Cylindrical roller bearing features
1. Roller And Raceway For Line Contact Or Repair Line Contact, Radial Bearing Capacity Is Large, Suitable For Bearing Heavy Loads And Impact Loads.
2. Small Friction Coefficient, Suitable For High Speed, Limit Speed Close To Deep Groove Ball Bearings.
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 A Free End Support.
4. The Processing Requirements For The Shaft Or Seat Hole Are Higher, And The Relative Deviation Of The Outer Ring Axis After The Bearing Installation Should Be Strictly Controlled To Avoid Contact Stress Concentration.
5. The Inner Ring Or Outer Ring Can Be Separated For Easy Installation And Disassembly.
Application
Large motors, Machine tool spindles, Engine front and rear support shafts, Train and bus box shaft support, Diesel engine crankshaft, Automobile and tractor gearbox, Internal combustion engine, Generator, Gas turbine, Reducer, Rolling mill, Vibrating screen and lifting and transportation machinery
