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Spherical roller bearing

Spherical roller bearings have two rows of rollers that are mainly used for withstanding radial loads and also axial loads in either direction. Self-aligning roller bearings have high radial load capacity, especially suitable for heavy load or vibration load, but can not withstand the axial load. Spherical roller thrust bearings have good self-aligning properties and can compensate for the coaxiality error. 


Main structural form of Spherical roller bearing:

I. Cylindrical hole spherical roller bearing

Cylindrical hole spherical roller bearing has four types: 20000 C, 20000 Cc20000 CACM, 20000TN1

20000C type bearing adopts symmetric spherical roller and steel plate stamping cage. The inner ring has no fixed ribs, and the roller is lengthened. The bearing capacity is large, 

and the retaining ring is guided by the inner ring during the movement, so the self-aligning performance is good.

20000CC bearing is an improved version of the 20000 c-type bearing. The friction between the bearing roller and the raceway is reduced and the load capacity is improved. 

20000 CACM type bearing adopts symmetric spherical roller and solid cage, with fixed small rib and movable intermediate retaining ring for inner ring. The main parameters and 

rated load of this type of bearing are the same as 20000CC bearing.

20000TN1 type bearing uses symmetrical spherical roller and nylon shaped cage. The inner ring has no fixed ribs and movable intermediate retaining ring. The cage is guided by 


The 20,000 Cc, 20,000 CACM and 20000TN1 bearings are the structural forms that have been developed and optimized in recent years, and should be selected as the priority.

II. Tapered bore spherical roller bearing

For bearings with inner hole taper of 1:12, the rear code is indicated by K; For bearings with inner hole taper 1:30, the rear code is indicated by K30. When such bearings are 

matched with the conical shaft diameter, the radial clearance of the bearing can be adjusted by the inner ring moving along the axial direction.

III. Spherical roller bearing mounted on a adapter sleeve

The tapered roller spherical roller bearings with the rear code K and K30 are mounted on the matching adapter sleeves, and then they will be the bearings with rear code K+H 

and K30+H . This type of bearing can be mounted on an optical axis without shoulder and is suitable for applications where the bearing needs to be removed and removed 

frequently. For bearings with lubricating oil groove and three lubricating oil holes on the outer ring of the above bearings, the rear code is W33.


Railway transportation is one of the main ways of transportation. As the main means of railway transportation, train technology is constantly innovating. Freight vehicles with increasing load, locomotive vehicles with increasing traction, or passenger vehicles with increasing running speed are affecting people's way of life.



There are many kinds of metallurgical equipment, including not only the equipment needed by the raw material factory, but also the equipment needed from the upstream process to the downstream process, such as steelmaking process, steel rolling process and leveling process. These bearings are used under the special conditions of iron powder, water and heat of metallurgical equipment, so they need to meet the requirements of heavy load , vibration shock, from ultra-low speed to high-speed & rapid acceleration and deceleration. "Stable operation and improved production efficiency" can be described as a representative industry in the field of metallurgical equipment. ZYS is not only in bearing design technology, but also in various aspects such as bearing material technology, lubrication technology, and analytical technology.



Oil and gas technology is developing at a very rapid pace, and exploiting deeper oil and gas resources in harsher environments means that the top drives need more power to withstand higherloads.When unforeseen downtime costs are as high as $1 million per day, the reliability of equipment becomes particularly important, and the reliability of key parts of the bearing directly determines the performance of the equipment.



As a renewable and clean energy source, wind power is rapidly developing all over the world. Large wind turbines are giant machinery. Nowadays, many 2MW wind power plants under construction have wind turbine blades with a length of about 40 meters, a rotating shaft with a height of 60 to 100 meters and total weight of more than 200 tons. Therefore, the bearings used in wind power must also be large, with an inner diameter ranging from 100 mm to 700 mm. Some models require bearings with an inner diameter of nearly 2 meters. Bearings for wind turbines require high reliability, because the bearings are designed to keep the windmill running for 20 years; and when the fault occurs, the parts are not easy to replace (the bearing is used at a long distance from the ground). Bearing manufacturers need to have a high degree of computer analysis technology and exquisite skills in materials and heat treatment, and need to master the test evaluation technology for large bearing .