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A Specialist on Spherical Roller Bearings Since  1969
quality management
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Quality Control System

Quality Control System

WGB's bearing products are manufactured to meet and often exceed industry benchmarks. We have earned certifications from renowned international organizations, ensuring that our production processes adhere to strict quality guidelines. These certifications reflect our continuous efforts to maintain the highest standards in manufacturing, design, and customer satisfaction.

Browse through our collection of certificates to gain insight into our commitment to quality, reliability, and precision. These accolades reinforce our position as a trusted manufacturer of spherical roller bearings for various industries.For us, these certificates are more than just pieces of paper; they represent our unwavering dedication to excellence. When you choose WGB, you're choosing a partner committed to providing you with the best spherical roller bearings available in the market.

Feel free to reach out to us if you have any questions or need further information about our certificates or quality assurance practices. We're here to ensure you have complete confidence in our products and services.

Inspection and Measurement

Raw Material Photoelectric Spectrometer
Zeiss Metallographic Microscope
Olympus Metallographic
Beairng Life Tester
Hexagon CMM
Tylor Hobson Surface Profiler1
Tylor Hobson Roundess Tester
Mitutoyo Roundness Tester
Mahr Toughness Tester
Vibration Noise Measuring Instrument
Length Measuring Instrument

Premium Raw Materials

 Constantly apply the premium-level raw materials
 Strictly conduct the raw material IQC every single batch
 Conduct the raw materials IQC by using multiple methods: chemical element compositions, macrostructure, microstructure, non-metallic inclusions, carbides ect..
 Manage raw materials by batch and process workpieces by the principle of FIFO (First-In-First-Out) in the production to ensure the traceability from finished bearings to raw materials

Optimized Heat Treatment

 Exclusively own high quality salt bath heat treatment lines with bainite and martensite available in WGB factory
 Accurately control the hardening and tempering process to achieve the required microstructures, avoid decarbonization and ensure the hardness uniformity
 Strictly control the ring and roller size and minimize the deformation; apply the deep cold process and high-frequency annealing in the factory when required
 As per specific bearing applications and client requirements, optimize and adjust the salt bath heat treatment process to improve the bearing performance and extend the service life under the specific application: high temperature, shocking loads, heavy contamination…
Martensite 2nd Level 1000X
Martensite 3rd Level 1000X
Acicular Troostite 500X
Bulky Troostite 500X

A Specialist on
Spherical Roller Bearings
Since 1969

No.219 Changjiang East Road,
Xinwu District, Wuxi, Jiangsu,
China 214142



+86 510 8531 0160 (Global)
+86 510 8531 1155 (China)


+86 510 8531 0150 (Global)
+86 510 8531 1720 (China)
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