PRECISION MACHINING

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We offer a diverse range of CNC precision machining in single items as well as mass production with 30+ types of materials:
  • Steel, Stainless Steel,Special Steel
  • Aluminum
  • Copper & Brass
  • Plastic
Maximum workpiece dimensions​:
  • CNC lathe (X-Z) up to 450×1,000 mm​
  • CNC milling machine (X-Y-Z) up to 1,050x510x460 mm​
Accuracy​: 0.003 mm​
Capacity​: 1,000,000 parts/month

Stainless Steel

Materials: SUS316,

SUS304, SUS303

Accuracy​: ± 0.01~0.03

Aluminum A2017, A7075, A6061

Materials: A2017,

A7075, A6061, A5052

Accuracy: ± 0.01~0.03

Plastic POM, MC, PMMA, PET

Materials: POM, MC,

PMMA, PET, Peek

Accuracy: ± 0.01~0.03

Copper & brass C3604, C1100, Becu

Materials:Copper&Brass

C3604, C1100

Accuracy: ± 0.01~0.03

JIG DESIGN & FABRICATION

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Yamaguchi designs, manufactures and assembles machining jigs, inspection jigs, assembly jigs,… with high precision requirements.

J-YGC-8

Materials: A6061

LxWxH: 128x125x63

Accuracy: ± 0.02

J-YGC-9

Materials: A6061

LxWxH: 125x95x63

Accuracy: ± 0.02

J-YGC-4

Materials: S50C+SKS3

LxWxH: 300x250x200

Accuracy: ± 0.02

J-YGC-1

Materials: S55C

LxWxH: 350x350x300

Accuracy: ± 0.02

ALUMINUM DIE-CASTING

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Yamaguchi produces aluminum die casting parts for various industries: precision machining, semiconductor, electronics, automotive, aviation, energy,…
  • Production output: 40,000 parts/month
  • Machine capacity: 420 tons
  • Maximum product weight: 4.18 kg

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SURFACE TREATMENT

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Yamaguchi cooperates with reliable suppliers to perform surface treatment services:
  • Anodizing: Clear anodizing, white hard anodizing, black anodizing, black hard anodizing
  • Hard chrome plating
  • Black oxide
  • Nickel plating: Electrolytic nickel plating, electroless nickel plating
  • Zinc plating: Clear/Blue zinc plating, Clear/Yellow/Gold zinc plating, Rainbow zinc plating
  • Phosphate coating

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HEAT TREATMENT

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Yamaguchi cooperates with reliable suppliers to perform heat treatment services:
  • Vacuum heat treating, quenching
  • Nitriding
  • Carbonizing
  • Induction heating

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QUALITY ASSURANCE

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• Yamaguchi operates a quality management system according to ISO 9001:2015.
• Perform IQC, IPQC, and OQC processes including defined sampling frequency and sampling plan.
• Work instructions for all operation and testing processes are available and put in process.
• 4M Change Analysis and Statistical techniques e.g. Pareto diagram, fishbone diagram, and control chart,… are applied to quality issue analysis and quality improvement.
• Implement PFMEA and PPAP. Key characteristics are identified in the control plan and are derived from FMEA.
• Apply process capability studies (Cp/ Cpk) and control chart to critical machining/ assembly/ testing process.
• A system to monitor the correct revision of drawings, change notices, and specifications is in use.
• A first in – first out (FIFO) system is utilized.