Quality Assurance
Zhejiang Pinnuo Machinery Co., Ltd. is mainly engaged in the production and sales of bearing rings and heat treatment bearing rings.

Never stop quality improvement, and thrive with quality. Provide products to meet customer requirements and improve customer satisfaction.

The company has passed the ISO/TS16949

quality management system certification,

and passed the IATF16949 quality management system certification in 2018.

The company has obtained the ISO14001 environmental management system certification, and has been recognized as a safety production standard second grade safety production (mechanical) enterprise.

Quality Control Capability

The company is equipped with high-end testing equipment such as profiler, image measuring instrument, metallographic microscope, digital Rockwell hardness tester and digital display Vickers hardness tester to meet high-precision quality control requirements of customers.



Image measuring instrument

Metallographic microscope

Digital Rockwell

hardness tester

Digital display Vickers hardness tester

Automatic eddy current flaw detector

Three gas analyzer

Measuring range: 0 ~ 250mm It can measure the shape of the plain wire, straightness, angle, crown, logarithmic curve, groove depth and groove width of various precision mechanical parts.

Measuring range: 0 ~ 150mm

It can measure the shape of the plain wire, straightness, angle, crown,

logarithmic curve, groove depth and groove width of various precision

mechanical parts.

The instrument is suitable for use in the field of two-dimensional planar

measurement. Mainly measuring machinery, molds, precision hardware,

precision stamping, gears, cams, threads, bearings, etc.

It is mainly used to measure the metallographic structure of products after

heat treatment such as spheroidized structure, quenched structure, tempered structure, troostite and the like.

The digital Rockwell hardness tester is a mechatronics hardness tester, which is controlled by a microcomputer and the hardness value is directly displayed by numbers. In addition to the test bench lift, automation is fully automated, eliminating operational and reading errors. The hardness tester is suitable for the hardness measurement of ferrous, non-ferrous and non-metallic


The Vickers hardness tester is mainly used to test the hardness of small

precision parts, the hardness of the hardfacing layer and the depth of the effective hardened layer, and the surface hardness of the coating.

The equipment is suitable for the bearing manufacturing industry to detect

the cracks formed by the quenching and grinding of the raw material of the bearing ring. Compared with the magnetic particle flaw detector, it has the

advantages of high automation, fast detection speed, convenient inspection process and no influence by unmanned factors.

The portable three gas calculates the carbon potential by detecting carbon monoxide, carbon dioxide and methane in the atmosphere of the furnace,

thereby achieving the purpose of controlling the carbon potential in the


Tel:+86 575 86338082
              +86 575 86596258
Fax:+86 575 86338093
+86 575 86596258
Address:No. 2, Xinshi Road, Xinchang Industrial Park, Xinchang County, Zhejiang Province, China
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