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Spherical Roller Bearings

Spherical roller bearing consists of an outer ring with spherical raceway, a double inner ring, one or two cages and a group of spherical rollers. Since the center of the outer ring is consistent with the center of the bearing, it has the self-aligning performance, and can automatically adjust the tilt or shaft deflection caused by the angle error between the shaft and the housing. It can withstand large radial load and certain bidirectional axial load, and is especially suitable for the conditions of heavy load or vibration.
Spherical roller bearings have cylindrical bore and tapered bore. Tapered bore bearings are marked with the symbol “K” (taper 1:12) or “K30” (taper 1:30) after the basic model. TWB spherical roller bearings have C type, CA type, MB type and other structures, which are suitable for different conditions.

Consult TWB Application Engineer>>>Bearing Parameter

Elevator

The elevator industry has higher requirements for bearing performance, which is mainly focusing on high-speed, smooth and noise performance. China is the largest manufacturing country and consumer market in the world's elevator industry, and most of the world's famous elevator companies have factories in China. As one of the first bearing suppliers to realize import substitution in the elevator industry, TWB already has been supporting most of the leading enterprises in these industries for more than ten years, and has occupied the leading share in this market.

Concrete Mixing Truck

The concrete mixing truck uses a special reducer, which is different from the traditional reducer. Its structural design and manufacturing process are very special, so bearing is required to adapt to the bad working conditions of low speed, heavy load, partial load and impact load. Especially even when the flange connection transfer large swing Angle variation still need keep stable, reliable, low noise operation.

Mining

Mining equipment usually operates under harsh environments such as dust and muddy water condition, and needs to bear extreme application conditions such as low speed and heavy load, impact and vibration. Its harsh operating environment causes a great challenge to the reliable operation of the equipment.

Cold Forming

Bearing working condition in cold forming machine industry is bad with the big cycle impact load, poor lubrication condition, many impurities produced during operation, and easy wear and tear. Because of the high cost of emergency maintenance, customers have higher requirements for bearing wear resistance, reliability and working life.

Laundry

To better meet the laundry machine smoothly running requirement under the condition of high speed, high temperature rising, TWB improves manufacturing process standards and provides a series of special bearing with higher precision for this industry, which not only meets the requirement for higher load and high speed, smoothly and quietly running, but also effectively reduces heat generating when machine is running and increases the service life.

Textile

With the development of textile machinery towards light, multi-function and high-speed, higher requirements have been put forward for the structure, performance and reliability of bearings. The whole series of TWB products are widely used and win the long-term trust of customers in the field of textile machine, with the assurance of high speed, low vibration, low noise, and long life.

Blowers & Fans

Blower & fan is machinery used to compress gas or convey gas, generally used for ventilating, dust exhausting or cooling. The fan industry has uneven performance requirements for bearings. Based on higher-end fan applications, TWB already has established a product reputation of low noise, high stability and long life.

Structure Design of Spherical Roller Bearings

Type C

There is no rib on both sides of the inner ring of the C-type bearing. There are two stamped steel cages and a movable retainer ring between two rows of spherical rollers. Type C is the second-generation design, which is characterized by the use of stamped steel cage and reinforced symmetrical roller. After optimization design, it has higher rating load than conventional products, wider application range and longer service life. When the bearing bears axial load, it can adjust the load and speed of two rows of rollers to make it distribute evenly, avoiding stress concentration and bearing by single row of rollers.

Type CA

The inner ring of CA type bearing has rib on both sides, a retainer and two rows of spherical rollers. Type CA is another structure designed as the second generation. It is characterized using precision machined brass cages and reinforced symmetrical rollers. The rating load is the same as that of type C design, and it can be used universally with type C design, especially for large size models. When the bearing bears axial load, it can adjust the load and speed of two rows of rollers to make it distribute evenly, avoiding stress concentration and bearing by single row of rollers.

Type MB

MB type is spherical roller bearing with fixed rib, with ribs on both sides of inner ring, a fixed middle rib in the middle, and two cages. The roller is spherical symmetric one. When the bearing is running, the fixed middle rib cannot move axially, but it guides the roller well. When bearing bears axial load, it cannot adjust the load on two rows of rollers, and it is easy for single row of rollers to bear force or produce stress concentration.

2RS Sealed Bearings

Both sides of the bearing are equipped with contact seals, which are made of oil resistant and wear-resistant rubber with steel skeleton. At present, TWB provides two kinds of rubber seals: nitrile -butadiene rubber (NBR) and fluororubber (FPM). Fluororubber will emit toxic gas at high temperature of 300 ℃, so you should be careful when selecting this material. Never clean or heat the sealing bearing more than 80 ℃ before installation. When replenishing the lubricating grease for the sealed bearing, it is necessary to slowly inject the lubricating grease into the lubricating hole of the outer ring, and rotate the bearing at the same time, so that the new lubricating grease can be evenly distributed in the bearing. In addition, excessive pressure shall be avoided to avoid damaging the seals.

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Bearing Parameter

Bearing code