Some Ideas About The Development Direction Of Bearing Industry In China

In recent years, the development of bearing manufacturing industry in China is strong, which will bring good effect to the market of bearing steel. The demand for some high-end bearings has increased dramatically, such as aerospace bearings, high-speed precision bearings for machine tool spindle , Precision Angular Contact Ball Bearings for ball screw bearings, high speed spindle bearings, turntable bearings, wind power bearings, joint bearings, etc. Large demand has created the development of a large number of enterprises.

According to statistics, at present, there are more than 1400 bearing enterprises in China. Although the overall trend is positive, with the evolution of global economy and integration, the bearing industry has also encountered great challenges, including the acceleration of product life cycle shortening, highly customized product demand and increased competition in different markets around the world. In order to solve these problems, the bearing industry needs to start from many aspects.

1. Improve product technology development, work efficiency, reliability and precision.

2. Achieve mass production and pursue better quality.

3. Realize specialization division.

Cross Roller Bearing is a special type bearing. Because of the inner ring or outer ring were separated, after loading the roller and the cage, it is fixed with the cross roller shaft ring to prevent the separation, so the operation is simple when installing the cross roller shaft ring. Since the rollers are intersected, only one set of cross roller bearings can withstand the load in each direction, which is three to four times more rigid than the traditional model. At the same time, because the inner ring or outer ring of the cross Roller Bearing is a two-part structure, the bearing clearance can be adjusted, and even if it is preloaded, it can obtain a high-precision rotary motion. Moreover, because of its special structure, it is commonly used in industrial robots as joint bearings.

The classification and model series of cross roller bearings are below:

RB type (outer ring segment)

RB series models for cross roller bearing, basic, inner and outer ring size is minimal to miniaturization, its structure is the outer ring is divided, the inner ring design is an organic whole, the inner ring spinning of high precision parts suitable for requirements.

RE type (inner ring segment)

The RE series is a new type of XRB design concept, which is the same size as the XRB type.The structure of the inner ring is the split type and the outer ring is one design, which is suitable for the parts with high rotating precision of outer ring.

RU type (inner and outer circle)

The RU series model is not required to be fixed flange and support base due to the processing of mounting holes.In addition, due to the adoption of the integrated inner and outer ring structure of the belt, the installation has little effect on the performance, thus achieving stable rotation precision and torque.Can be used for outer ring and inner ring rotation.

RBC type (outer ring segment)

The RBC series model (corresponding to the CRBC series of IKO company) is composed of the outer ring is the split type, the inner ring is one design, and the belt is fully loaded with roller bearings.Suitable for high rotation accuracy of inner ring.

CRBH type (inner and outer ring)

CRBH series model, outer ring and outer ring are integral structure, used for outer ring and inner ring rotation.

RA type (outer circle segmentation, ultrathin type)

The RA series model is the compact type that reduces the thickness of RB and outer ring to the limit.Suitable for areas with light weight and compact design, such as rotating parts of robot and manipulator.

SX type (outer ring segment)

The structure of SX series is similar to that of RB series. The outer ring is a two-part structure, which is designed with three spring card rings and the inner ring, which is suitable for the place where the inner ring has high rotation precision.

XRU08 type (inside and outside)

XSU08 series is similar to the RU series, and the inner and outer rings have been machined with holes, so no fixed flange and support seats are required.Due to the adoption of the integrated inner and outer ring structure, the installation has little effect on the performance, thus achieving stable rotation precision and torque.Can be used for outer ring and inner ring rotation.

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Cross Roller Bearing

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