
DONGGUAN BEARING FACTORY manufactures housed spherical outer surface ball bearing units, supported by advanced heat treatment, grinding, assembly lines and comprehensive testing capabilities.
DONGGUAN BEARING FACTORY (restructured as Dongguan TR Bearing Co., Ltd.) specializes in the manufacture of spherical outside surface ball bearing units. Founded in 1979, the company began developing and producing these bearing units from 1980 and has built a broad product program covering 11 series and more than 1,300 items.
The company operates industry-leading heat treatment, grinding and assembly production lines, supported by a complete set of precision inspection and testing equipment, including bearing life testing and material testing capabilities. It also runs a provincial-level bearing engineering technology R&D center and an enterprise technology center, strengthening product development, performance design and validation.
With ongoing technical transformation investment, output has expanded to 7.8 million units. The company employs 517 people, including 115 technical staff, and reports total assets of RMB 112.24 million. Products cover bearing outer diameters from 40 mm to 300 mm and are manufactured under strict production management and total quality control.

Specializes in housed spherical outer surface ball bearing units, supported by dedicated heat treatment, grinding and assembly lines and precision inspection equipment.
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Manufactures bearings with outer diameters ranging from 40 mm to 300 mm, supporting a wide range of applications.
Operates bearing heat treatment, grinding and assembly production lines, and has introduced multiple automated grinding and superfinishing lines.
Equipped with precision inspection and testing equipment, including bearing life testing, material tensile testing, hardness measurement, and dimensional and roundness inspection.
Operates a Guangdong provincial-level bearing engineering technology R&D center and an enterprise technology center, supporting product development, performance design and validation.
Established as Dongguan TR Bearing Factory.
Started developing, producing spherical outside surface ball bearing units and marketing abroad.
Awarded as an advanced provincial-level enterprise.
Named a national grade 2 enterprise and selected as one of ten export bases of bearing products; authorized for import and export through its own channel.
Recognized as a hi-tech enterprise.
Obtained ISO9001 quality management system certificate of conformity.
Received a famous-brand prize of Guangdong.
Recognized for abiding by contracts and valuing credit by the National Industrial and Commercial Administration.
Added a new heat treatment quenching and tempering production line.
TR trademark listed in the 2020 Guangdong key trademark protection directory.
Guided by the motto “quality is future, service is reputation, innovation is impetus and cooperation is wealth,” with a quality principle focused on strong management, continuous improvement, determined innovation and brand building.