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Add: No.999, Guanlin Road, Luolong District, Luoyang City, Henan province, China
Tel: 0086.379.6579.3878
Fax: 0086.379.6579.3877
E-mail: lyhg@lyhgbearing.com
skype id: lyhgbearing
Home > Inspection & Verification

CHG has the equipment and experience to provide expert quality inspection and product verification services on the bearings we provide and on third party bearings. Through the use of video microscope, dimensional including roundness, radius, & roughness (Ra), hardness, torque, anddigital noise/vibration AST has the means to verify bearings boundary and internal dimensional characteristics.

As CHG is an ISO 9001:2008 certified company, CHGmaintains a Tool and Gauge Calibration System. The tool and gauge calibration system conforms to ANSI/NCSL Z540-1.

To further ensure that product is exactly the quality level and specifications required, CHG’s Engineering Department works closely with its customers technical & engineering departments to provide assistance with bearing selection, proper lubricant, mounting, documentation including CAD files, and elimination of stack-up-tolerance issues.


The equipment and verification resources employed are:


Electronic Air Gauges with a resolution of ten millionths of an inch.

Vertical Comparators with digital amplifiers with a resolution of one millionth of an inch.

“GRW” Noise Tester

Taylor Hobson Form Talysurf 50 Profile Analyzer

Large bore noise and vibration analyzer

Electronic Balances

Digital and dial vernier calipers

Stereo Microscopes with digital video output

Radial Play Gauges with a resolution of twenty millionths of an inch.

Mitutoyo No 192-140 12” Vertical Height Gage.

Starrett Grade A – Inspection Level Granite Surface Plate.

Inch & Metric, Grade 2, Gauge Block Sets.

One Model 4TTA Wilson Rockwell Hardness Tester

Miniature and Instrument Bearing Torque Tester

Plug Gauges

Dial Indicators

Digital Micrometers

Barden Smoothrator


Contact us if you have need third party inspection or verification services. We will provide you “Value Beyond the Part.”