Materials We Machine
Quality Assurance & Industry Standards
Our manufacturing facility maintains ISO9001:2015 certification with comprehensive quality management systems.
All CNC machining processes follow AS9100 aerospace standards and ISO 13485 medical device requirements where applicable.
We employ statistical process control (SPC) methodologies and first article inspection (FAI) protocols to ensure
consistent quality across production runs.
Advanced metrology equipment including coordinate measuring machines (CMM), optical comparators,
and surface roughness testers verify dimensional accuracy and surface finish specifications.
Material traceability is maintained through certified material test reports (CMTRs) and heat code tracking.
Figure 1: Precision CNC machining of components
Figure 2: Quality inspection using CMM equipment
| Parameter | Specification | Standard | Testing Method |
|---|---|---|---|
| Tensile Strength | ≥ 500 MPa | ASTM E8/E8M | Universal Testing Machine |
| Hardness | HRC 30-40 | ASTM E18 | Rockwell Hardness Tester |
| Surface Roughness | Ra 0.4-1.6 μm | ISO 4287 | Surface Profilometer |
| Dimensional Tolerance | ±0.005-0.1 mm | ISO 2768-mK | CMM Inspection |
Table 1: Technical specifications and quality standards for precision machining
Key Advantages:
- High Precision: Tight tolerances up to ±0.005mm
- Superior Surface Finish: Ra 0.4μm achievable
- Material Consistency: Certified material traceability
- Cost Efficiency: Optimized machining parameters
- Fast Turnaround: 3-5 days for prototypes
Technical Specifications:
- Tolerance Range: ±0.005mm to ±0.1mm
- Surface Roughness: Ra 0.4μm to Ra 3.2μm
- Maximum Part Size: 500mm × 500mm × 300mm
- Machining Centers: 40+ CNC machines
- Quality Standards: ISO9001:2015 certified
JR CNC machines a wide range of metals and plastics:
Aluminum Alloys
- 6061-T6 (most common)
- 7075-T6 (high strength)
- 5052 (excellent corrosion resistance)
- 2024 (aerospace grade)
- 6082, 6063, 7050, etc.
Stainless Steels
- 304 / 304L (general purpose)
- 316 / 316L (marine grade)
- 303 (free machining)
- 17-4 PH (precipitation hardening)
- 416, 430, 440C
Carbon Steels
- 1018, 1045 (general purpose)
- 4140, 4340 (alloy steel)
- A36 (structural)
Titanium
- Grade 2 (commercially pure)
- Grade 5 / Ti6Al4V (aerospace)
Copper & Brass
- C36000 (free-cutting brass)
- C11000 (copper)
- C51000 (phosphor bronze)
Plastics
- ABS (general purpose)
- PC (polycarbonate)
- POM / Delrin (acetal)
- PEEK (high performance)
- Nylon, PTFE, HDPE
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