Cylindrical roller bearings are high-load bearings with rollers as rolling elements and linear contact rolling surfaces. The inner and outer rings are separated by cylindrical rollers, which have a larger contact area than ball bearings and can withstand higher radial loads. They are widely used in medium and high speed operation, high rigidity, and high load situations.Cylindrical roller bearings are one type of roller bearings that use cylindrical rollers as rolling elements. They are mainly used to withstand large radial loads and can adapt to high-speed operating conditions. Since the rollers and raceways are in line contact, the contact area is larger and the load-bearing capacity is stronger than the point contact of ball bearings. At the same time, the friction coefficient of cylindrical roller bearings is relatively low, which is suitable for mechanical equipment that requires high precision and high rigidity. According to the number of roller rows and the structural form, cylindrical roller bearings can be divided into single-row, double-row, multi-row and other types. Cylindrical roller bearings have excellent performance and have become an indispensable and important part of modern industrial equipment.
Cylindrical roller bearings consist of an inner ring, an outer ring, cylindrical rollers and a cage. Line contact is formed between the rollers and the raceways. Compared with the point contact of ball bearings, their contact stress is lower and their load-bearing capacity is stronger. Generally, they can only bear radial loads, but when the bearing structure has a rib design (such as NJ and NUP types), they can also bear certain axial loads. In addition, this bearing is rich in variety, and special structures such as no inner ring type, full roller type, four-row high-load type, etc. can be selected according to installation space restrictions or load characteristics to meet various working conditions.
（1）High load-bearing capacity
Line contact structure has strong ability to bear heavy radial loads, suitable for high-load applications
（2）Low friction coefficient, high speed
Especially with cage structure, suitable for medium and high-speed applications
（3）Separable structure
Inner and outer rings can be installed independently, bearings are easier to replace or lubricate
（4）Various models, optional functions
You can choose whether to bear axial force (such as NJ/NUP) according to the flange structure
（5）Compact structure and strong rigidity
Especially double-row NN/NNU type, suitable for high-precision spindle applications
（6）Full-fill roller type has stronger load-bearing capacity
Remove the cage design, the number of rollers is large, but the speed is limited
（7）No inner ring/outer ring structure adapts to narrow space
The rolling surface requires heat treatment and high-precision processing, suitable for special occasions
Application of roller bearingsDue to their high load-bearing capacity and impact resistance, roller bearings are widely used in various heavy-load, high-precision or complex mechanical systems. The following are their typical application areas:
(1) Heavy industry and energy equipment: Roller bearings are widely used in machine tools, mining equipment, metallurgical equipment, wind power generation, generators and engines, etc.
(2) Transportation equipment: Roller bearings are used in automobile wheels and gearboxes, railway locomotive axle boxes and gearboxes, aircraft engines and landing gears, etc.
(3) Agricultural and construction machinery: Roller bearings are used in tractors, harvesters, excavators, cranes and other fields.
(4) Other applications: Roller bearings are also used in medical equipment, robot joints, optical equipment and other fields.
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Zhangzhou Dingsen Trading Co., Ltd.
