Quality Control

We are an ISO9001:2015 certified company showing our determination and insistence on quality and continuous progression.

Our QC dept. takes charge of the production quality. We check every step of the processes such as the inspection of forging material, daily process inspection, and final product inspection. Besides, the MSA and SPC analysis also show that our process stability and measurement system are reliable. We have faith to deliver excellent products to our customers.

Main Inspection Instruments
Measurement Scope Tolerance Instrument Capability
Bore Diameter ±0.005mm Bore Gauge (Sunnen) 0.001mm
Bore to Bore Distance ±0.05mm Micro-Hite Gauge (TESA) 0.001mm
Rod Thickness ±0.05mm Micrometer (Mitutoyo) 0.001mm
Hardness HRC 25~45
HRC 59~63
Hardness Testing Machine (Mitutoyo) 1 HRC
Roundness / Cylindricity 0.003mm Round Tester (Mitutoyo) 0.01μm
Roughness Under Ra 0.2μm Roughness Meter (Mitutoyo) 0.01μm
Parallelism 0.05/100 Indicator (Mitutoyo) 0.01mm
Ring Gauge Correction ±1μm Universal Length Measuring Instrument (Helios) 0.1μm
Rod Profile ±0.30mm Video Measuring System (ARCS) 0.5μm

Bore Gauge

Micro-Hite Gauge

Hardness Testing Machine


Round Tester

Roughness Meter

Parallelism Measurement

Ring Gauge Correction

Video Measuring System