Consistently Enforcing Rigorous Quality Control

UTM Quality Control Process

1.Incoming Material Inspection

Check chemical composition and physical properties
Verify outer diameter (OD) dimensions

2.Cutting Process Inspection

Check length dimensions (47.5±0.2mm, 45.75±0.1mm)
Verify center distance (4X22.875±0.1mm)

3.Lathing Process Inspection:

Inspect outer diameters (Ф80±0.1mm, Ф70max, Ф69.4±0.13mm, Ф74.8±0.13mm, Ф68.5±0.25mm, Ф63±0.25mm)
Check inner diameters and hole dimensions (6±0.5mm, 55±0.02mm)
Verify groove dimensions (59.5±0.25mm, width 3.18±0.25mm)
Confirm relative position tolerances

4.Deburring Inspection

Visual inspection for burrs on the surface

5.Heat Treatment Inspection:

Check compound layer depth (0.01~0.025mm)
Verify hardness (460 HK100 MIN at 0.050 depth below compound layer, 60 HRC MIN surface hardness)

6.Lathing Process Inspection:

Perform comprehensive dimensional inspection using gauges, micrometers, and CMM
Visual inspection for overall appearance and defects

7.Surface Treatment Inspection

Verify cleanliness per JDS-G169 Class 6.4 (Total part area=0.025㎡, Maximum allowable contaminant=7.122mg)

8.Packing Inspection

Check quantity, marking, and part number accuracy

9.Documentation

Record inspection results and maintain traceability
Review and approve inspection reports

UTM Quality Control Office

UTM Quality Inspection Equipment

SEREIN Croma 8126 Coordinate Measuring Machine (CMM) 800×1200×600 (mm), MPE (maximum permissible error) 3.0μm
ScanTech PRINCE775 Handheld 3D Scanner Laser source: 7+1 red laser crosses / 5 blue parallel laser lines Effective work range 200mm~450mm / 100mm~200mm, Accuracy Up to 0.03mm
Granite Inspection Table, 1200×1000 (mm) / 1000×750 (mm)
Digimatic Heitht Gages, 0-600 (mm)
Full Range of Vernier Caliper, 0-100-150-200-300-600-1000 (mm)
Outside Micrometers / Digimatic Holtest, 0-25-75-100-125-150 (mm) / 12-20-50-100 (mm)

UTM CNC Shop

Put your automotive parts into production today.

English