Quality Management

Bushing mfg is certified by ISO 9001. With the continuously improved operation management processes, comprehensive professional inspection instruments and high-quality quality team, bushing mfg implements the entire process of quality control through raw material inspection, process monitoring, and finished product inspection. we assures the high quality and traceability of every bearing to our customers.

Select high-quality steel

Check raw material quality

Physical and chemical analysis

        Quality control plan

Control production process

CPK monitor of key process

In-process quality control

Save all process inspection records

Quality control of outsourcing components

Heat treatment check

OQC standard:
Sampling check: S-3
AQL main item:1.0
AQL Sub item:4.0

In bushing mfg inspection lab, we are equipped with advanced inspection instruments and testing equipment, e.g.:

 Instrument Specification
 SPECTROCHECK metal analyzer Analysis of 26 elements
 NITON hand-held metal analyze Analysis of 23 elements
 MAHR contour & surface measuring station Resolution: 2nm
 MAHR universal form measuring machine Roundness deviation:

0.01um + 0.00025um/mm measuring height

Axial runout deviation:

0.02um + 0.0001um/mm measuring height

 Length measuring instrument Accuracy: 0.5um
 Salt spray testing machine Neutral salt spray test
Acidic salt spray test
Temperature and humidity cycle salt spray test
 Life testing machine Bearing lifetime test
Bearing reliability test

And yet, we keep bringing in the latest instruments. With all this equipment and our experience, we are able to provide expert quality inspection including material, metallography, hardness, dimension precision, rotation precision, clearance, etc. What’s more, we are also able to do special tests according to customer’s requirement, such as lifetime test, salt spray test, water-resistance test, etc. To further ensure the product quality, we works closely with third party bearing labs and institutions for a product tests.


Quality Creates Value is the slogan of every Bushing mfg employee. We are committed to improving product quality, customer experience, and customer satisfaction.