Vacuum Casting Services
SANGO runs rapid vacuum casting (polyurethane casting) from high-grade RTV silicone molds. High-vacuum degassing chambers replicate SLA master models with extreme fidelity, producing parts that mirror production injection-molded plastics (ABS, PP, PC, PMMA, rubber) in as little as 5 to 7 days — no steel tooling required.
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Advanced Process Capabilities & Technologies
State-of-the-art multi-axis CNC machines, laser cutters, and metrology labs engineered for zero-defect production.
High-Vacuum Polyurethane Casting
Eliminates all trapped micro-bubbles and air voids, ensuring solid, dense, bubble-free parts with uniform mechanical strength.
Silicone Tooling from SLA Masters
High-accuracy master pattern 3D printed via high-res SLA, hand-finished to desired SPI texture, and encapsulated in liquid silicone.
CNC Milling Solutions for Every Industry
Sango provides CNC milling services for a wide range of industries, helping customers manufacture precision components from prototype to production.
Our engineering team understands the unique requirements of different applications—from lightweight aerospace structures and medical devices to automotive systems and industrial equipment—and recommends machining solutions that balance performance, manufacturability, and cost.
Technical Specifications & Tolerances
| Typical Tolerances | ±0.15 mm per 100 mm (subject to master shrinkage) |
| Batch Quantity Range | 5 to 100+ parts per project |
| Surface Textures Available | Glossy, Satin, Matte Bead Blast, Mold-Tech texture, Custom soft-touch painting |
Material Options for CNC Milling
Extensive selection of engineering metals and plastics stocked and machined by Sango Machining.
Aluminum Alloys
A wide range of aluminum alloys to meet different application requirements. 5052-H32 offers excellent corrosion resistance, 6061-T6 provides high strength and machinability, while 1100 and 3003 are ideal for parts requiring superior formability and lightweight performance.
Surface Finishes for CNC Milled Parts
Surface treatment and post-machining options available at Sango Machining to achieve cosmetic and functional standards.
As-Milled
Standard machined surface finish with minor tool marks (Ra 1.6–3.2 µm).
Bead Blasting
Uniform satin or matte texture removing tool marks and imperfections.
Anodizing (Type II & Type III Hardcoat)
Type II anodizing & Type III Hardcoat for maximum wear/corrosion resistance.
Powder Coating & Painting
Durable protective coatings matched to RAL or Pantone color codes.
Plating & Polishing
Electroless nickel plating, zinc plating, chrome plating, mirror polishing, & custom passivation.
CNC Milling Service Tolerances
Our precision CNC milling services follow ISO 2768-m for metals and ISO 2768-c for plastics, delivering stable, repeatable dimensional accuracy across 3-axis, 4-axis, and 5-axis CNC milling.
Why Engineers Choose Our CNC Milling Services
Precision CNC Milling Parts
Our precision CNC milling services with tolerances as tight as ±0.01 mm. Our advanced CNC milling machines ensure consistent accuracy for custom metal and plastic parts.
Fast & Scalable CNC Milling Production
Ideal for bridging to full production or scheduling small batches, our low-volume sheet metal fabrication service flexes to fit your timeline, ensuring consistent, on-time delivery with top-notch quality.
Engineering Support
As an experienced CNC milling company, our engineers provide DFM feedback and machining guidance to optimize designs for custom CNC milling services, helping reduce cost and improve manufacturability.
CNC Milling Process forCustom Part Manufacturing
CNC milling uses computer-controlled rotating cutting tools to remove material from a stationary workpiece. By moving the cutting tool or workpiece along multiple axes.
CAD Review
Engineers review your CAD file, material selection, tolerance requirements, and surface finish specifications.
Machine Setup
The workpiece is securely clamped onto the machine table, cutting tools are installed, and the CNC program is loaded and verified.
Milling & Inspection
Rotating cutting tools remove material according to the programmed toolpaths. Finished parts are inspected to verify dimensions, tolerances, & surface quality before delivery.
Applications of CNCMilling
CNC Milling is huge in making a ton of products—anything from car parts to medical devices. It's super efficient because it can produce lots of identical plastic parts with tight tolerances, all at a low cost per part. That's why so many industries rely on it for mass production. Whether it's a simple or complex design, it keeps quality high and production fast.
Advantages ofInjection Molding
Disadvantages ofInjection Molding
High Precision
Produces highly accurate parts with tight tolerances and consistent quality.
Efficiency
Enables continuous automated production with shorter lead times and minimal downtime.
Complex Geometries
Creates intricate shapes and complex designs using multi-axis machining.
Flexibility
Supports a wide range of materials, including metals, plastics, and composites.
Medical Implants
Creates precise hip joints, dental implants, & surgical screws for medical applications.
Engine Components
Manufactures precise engine blocks, cylinder heads, & pistons for automotive.
Electronic Housings
Produces durable enclosures that securely protect electronic components & circuit boards.
Gear Components
Produces gears, splines, and shafts with tight tolerances for machinery & automotive use.
Real Parts & Precision Components
Examples of mission-critical parts manufactured in our facilities for global technology leaders.
Clear Automotive Headlight Lens
Water-clear polyurethane cast prototype headlight lens with UV inhibitor.
Medical Device Housing Assembly
Batch of 25 cosmetic prototype enclosures for clinical trial evaluations.
Frequently AskedQuestions?