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Granville bearing manufacturer in the production of electric motor grade deep groove ball bearings, super-precision angular contact ball bearings and cylindrical ball bearings. The company is committed to developing all kinds of precision radial ball bearings with inner diameter of 2mm-110mm.

The factory covers an area of 58000 square meters, has advanced fully automatic production lines and perfect quality testing center. After decades of management and innovation, with more than 120 automatic production lines, various kinds of testing, inspection instruments, with annual production capacity of 160 million sets of reliable high precision quality bearings.

Product Manufacturing Capacity

Smart factory.

Intelligent production mode-MES control system. Collect and manage information related to design, manufacturing and service processes in real time and apply it to product and process optimization.

Own the most advanced production equipment in the bearing industry.

> Auto grinding complete automatic production line

> All adopt high precision servo control machine tools

> Flexible robot auto material distribution

> Online integrated inspection to achieve auto control

> Online integrated inspection of quality indicators

> Automatic ZERO damage concept assembly facility

> Equipment seamless connection, logistics more safe and controllable

Quality Assurance

The comprehensive application of automatic production lines is a premise to ensure product’s stable quality, what’s more, it is a mark that the enterprises improve to digital management modern high-tech manufacturer.

Seiko quality, the pursuit of excellence: the control and improvement of quality is the constant pursuit of Granville, in strict accordance with the system of the provisions of the quality of each process.

We strictly follow the core of quality management process control:

APQP: product quality advance planning

SPC: Statistical process control

MSA: Measurement system analysis

FMEA: Analysis of potential failure modes and consequences

PPAP: Production part approval procedure


In the factory testing laboratories, various bearing parts are examined in detail. The factory has its own professional bearing life tester, after bearing life and durability test, our bearings have the advantages of long service life, and high durability. We are keeping introduction of the latest measurement and testing equipment. Quality procedures are based on extensive, repeatedly carried out product tests - both before inclusion in the range and after.

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