CNC Milling
Precision milling for prismatic parts, housings, brackets and components with complex pockets, holes and machined surfaces.
Learn MoreCNC MACHINING
Precision CNC Machiningfor Repeatable Production
Custom milled and turned parts from one piece to repeat production, with tolerances down to ±0.01 mm and lead times from 3 days after drawing review.
CNC Machining Capabilities
CNC milling, turning and micro machining for one-off parts, prototypes, low-volume batches and repeat production, matched to your geometry, tolerance and inspection requirements.
CNC Turning
CNC turning and Swiss-type machining for shafts, pins, bushings, threaded parts and other rotational components.
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Micro Machining
Precision machining for miniature shafts, pins, sleeves, inserts and other small components that require controlled features and careful handling.
Learn MorePRODUCTION RANGEFrom Prototype to Repeat ProductionOne-off parts · low-volume batches · repeat orders
Lead Times Confirmed After Review
Qualified simple parts may start from 3 days. Standard and complex projects are confirmed after drawing and technical review.
CNC Machining Materials
Filter by material type and family to compare advantages, limitations and typical CNC machining applications.
01
SELECTED GROUP
Metals
9 material categories
MakeItFrom groups metals by their dominant alloy system. Select a family to compare practical CNC machining considerations.
02
Material family
03
Material overview
Metal
Aluminum Alloys
- 6061
- 6082
- 7075
- 2024
- MIC-6
- Advantages
- Lightweight, fast to machine and naturally corrosion resistant, with an excellent strength-to-weight ratio.
- Limitations
- Lower stiffness and wear resistance than steel; some high-strength grades have limited weldability.
- Typical applications
- Housings, brackets, heat sinks, robotics components, fixtures and aerospace structures.
LEAD TIME5 business days for most projects
Simple parts can be delivered in as fast as 1 day.
One standard. Every step.
ISO 2768-m is our default tolerance standard. Customer-specified standards are reviewed and translated into controlled internal drawings, keeping production and inspection aligned from start to finish.
View Quality Assurance
- Default Standard
- ISO 2768-m
- Customer Standards
- Accepted and reviewed
- Internal Control
- One controlled drawing at every step
Surface Finishes
Choose by material and purpose.
Compare common finishing options for appearance, corrosion protection and wear resistance.| Finish | Typical Materials | Main Result |
|---|---|---|
| As Machined | Metals & plastics | Fastest option with visible machining marks |
| Bead Blasting | Metals | Uniform matte surface with a light texture |
| Anodizing | Aluminum | Corrosion protection with optional color |
| Hard Anodizing | Aluminum | Harder surface for improved wear resistance |
| Powder Coating | Metals | Durable protective layer with custom color |
| Electroless Nickel Plating | Aluminum & steel | Wear and corrosion resistance with even coverage |
| Passivation | Stainless steel | Improved corrosion resistance without added color |
| Black Oxide | Steel | Low-glare black appearance with light protection |
REAL CNC PROJECTS
Real CNC Projects, Different Production Challenges
See how OUJI approaches prototype, repeat-production, and complex multi-process CNC parts through practical process planning, production control, and inspection.
Parts that require more than machine time.
Rapid Prototype
- Part
- Aluminum Alloy
- Challenge
- The indicated bare aluminum areas required tight dimensional control, no black anodizing, no contamination, and a clean appearance.
- OUJI Approach
- OUJI black-anodized the part first, then precision-located it for secondary machining to remove the coating from the specified surfaces.
- Result
- The prototype met the customer's dimensional and appearance requirements without the uneven edges or marks associated with masking.
Repeat Production
- Part
- Aluminum Alloy
- Challenge
- Multiple related precision dimensions had to remain stable after black hardcoat anodizing. Repeated setups caused variation, requiring full inspection before finishing, while rework was difficult and scrap risk was high.
- OUJI Approach
- OUJI used 3+2-axis machining to reduce setups and complete related critical features in one setup. Custom tooling maintained bore consistency, while on-machine checks at fixed intervals controlled process drift.
- Result
- Stable dimensions after anodizing, lower inspection and production costs, and reduced scrap risk.
Complex Multi-Process Part
- Part
- 20MnCr5 Steel
- Challenge
- Achieve a surface hardness of HRC 58–62 with a 0.4–0.6 mm case depth, while maintaining 0.02 mm concentricity and controlling the positional relationship between the external and internal gear features within 0.05 mm.
- OUJI Approach
- OUJI combined carburizing, gear shaping, and CNC turning. Machining was divided into controlled stages to limit heat-treatment distortion, with finish allowance reserved to recover concentricity and meet the gear requirements.
- Result
- All hardness, case-depth, concentricity, and gear-feature requirements were achieved to the customer's specification.
Why Choose OUJI
- Prototype experience shortens lead times
Extensive prototype machining experience helps reduce waiting time and move your project forward faster.
- Clear communication lowers total cost
Efficient communication and fast requirement conversion can reduce your total project cost by up to 20%.
- A skilled, accountable team
Experienced and responsible people reduce the time and risk involved in choosing the right manufacturing solution.
Frequently Asked Questions
Quick answers about CNC machining pricing, tolerances, lead times and quotation requirements.Most CNC machining projects are quoted per part rather than by a fixed hourly rate. Pricing depends on material, part geometry, programming and setup, machining time, tolerance, quantity, inspection, surface finishing and documentation requirements. Send us your 3D model and drawing for an accurate quotation.