Get precision custom CNC milling parts with tight tolerances, fast lead times, and competitive pricing. Upload your 2D/3D drawings for an instant quote today.
Precision milling in aluminum, steel, titanium & engineering plastics. Tolerances from ±0.005mm. Fast quoting, reliable delivery.
Ideal for flat and contoured surfaces with high-volume repeatability.
Perfect for complex geometries requiring rotation on one additional axis.
Maximum flexibility for complex, multi-face custom milled parts in one setup.
Combined turning and milling for cylindrical custom components.
✅ Tight Tolerances, Guaranteed — Milling accuracy to ±0.01mm for demanding applications
✅ All-in-One Capability — 3, 4 & 5-axis milling, turning, surface treatment in one facility
✅ Any Material, Any Complexity — Aluminum, stainless steel, titanium, PEEK, and more
✅ Rapid Lead Times — Prototypes in 3–5 days; production batches on schedule
✅ ISO-Certified Quality Control — Every custom milled part inspected before shipping
Our custom CNC milling capabilities cover a wide dimensional range — from miniature precision components to large structural parts. The table below outlines our standard maximum and minimum tolerances to help you determine whether your part requirements are within scope.
We offer single-side 3-axis machining, single-side 5-axis machining, with a minimum feature size and nominal thickness of 0.039 in (1 mm).
| Maximum Dimensions | Material | US | Metric |
| 3-axis** | ABS | 33.46 in. ×19.69 in. | 850mm × 500mm |
| POM | |||
| Nylon | |||
| pc | |||
| 3-axis** | Stainless steel | 33.46 in. ×19.69 in. | 850mm × 500mm |
| Titanium | |||
| Mild steel | |||
| Tool steel | |||
| 3-axis** | Aluminum | 33.46 in. ×19.69 in. | 850mm × 500mm |
| Cast iron | |||
| Copper | |||
| 5-axis | ABS | 10 in. x 7 in. | 254mm x 178mm |
| POM | |||
| 5-axis | Aluminum | 10 in. x 7 in. | 254mm x 178mm |
| Copper |
| Maximum Dimensions | US | Metric |
Size | 0.25 in. x 0.25 in. | 6.35mm x 6.35mm |
Nominal Thickness | 0.039 in. | 1mm |
*Hard metals: Ti 6Al-4V, stainless steels (303, 304, 316, 17-4PH), alloy steel (4140)
**Two-sided machining only.
We are capable of handling a wide range of materials and geometries:
Metals: Stainless steel, aluminum, brass, copper
Engineering Plastics: POM, Nylon, PTFE, ABS
High-Temperature Alloys: Ideal for aerospace and automotive components
Every manufacturing process is optimized for precision, from CAD modeling and CAM programming to final machining and finishing.
Aluminum | Brass | Copper | Stainless Steel | Alloy Steel | Steel Mild | Titanium | Low Carbon
Aluminum — Lightweight and machinable; ideal for aerospace, automotive, and consumer electronics custom milled parts
Stainless Steel — Corrosion-resistant; preferred for medical, food processing, and marine components
Brass — Excellent machinability and conductivity; widely used in electrical connectors, valves, and decorative custom milled parts
Titanium — High strength-to-weight ratio; used in aerospace and orthopedic applications
Low Carbon — Good weldability and ductility; commonly used for structural parts requiring further fabrication or forming
ABS丨Acetal 丨CPVC丨 HDPE | LDPE丨 Nylon丨 PEEK丨 PEI | PET丨PMMA丨Polycarbonate | Polypropylene 丨 POM(Delrin) | PPSU 丨HIPS丨 PSU丨 PTFE丨 PVC
POM — High stiffness and low friction; ideal for gears, bushings, and precision mechanical custom milled parts
Nylon — Tough, self-lubricating, and lightweight; widely used in automotive and industrial wear components
ABS — Impact-resistant and easy to machine; popular for housings, enclosures, and prototyping
PEEK / PBMA — Chemical-resistant engineering plastics for demanding industrial environments
PTFE — Ultra-low friction and chemically inert; used in seals, insulators, and laboratory-grade components
Ready to start your next project? Upload your technical drawings, and our system will provide a quick, accurate quotation. Get professional guidance on material selection, lead times, and surface finishing options to ensure your part is both functional and cost-effective.
Every custom CNC milling part can be finished to your specification. We offer a full range of surface treatments to enhance appearance, corrosion resistance, and mechanical performance.
Polishing creates a smooth, mirror-like surface finish on custom CNC milled parts, reducing roughness and eliminating tool marks. It enhances both appearance and reflectivity for high-precision components. Ideal for parts requiring optical clarity or decorative presentation.
It produces a uniform matte texture on metal and plastic CNC milled parts, removing tool marks, burrs, and surface imperfections. It delivers a clean, satin-like finish that improves both aesthetics and tactile feel. Suitable as a standalone finish or as prep for anodizing and painting.
A painted finish combines aesthetic flexibility with durable surface protection for custom CNC milled parts. Available in custom colors, gloss levels, and formulations to meet branding or functional needs. It effectively shields parts from oxidation, UV exposure, and environmental wear.
Anodizing enhances the durability and corrosion resistance of aluminum CNC milled parts while adding a clean, professional appearance. It increases surface hardness and provides excellent adhesion for paints or dyes. Have colors for both functional and decorative applications.
It is a chemical treatment that improves the corrosion resistance of stainless steel CNC milled parts by forming a protective oxide layer. It removes surface contaminants that can cause premature rust or degradation. Essential for components exposed to moisture, chemicals environments.
It deposits a protective metal layer that enhances wear resistance, surface hardness, and corrosion protection for precision CNC milled parts. It provides a shiny, smooth finish. Commonly specified for electrical connectors, medical devices, and industrial parts.
Simply send us your technical drawing or CAD file — we’ll review design feasibility, suggest machining improvements, and provide a detailed quotation. Our engineers assist with DFM (Design for Manufacturability) analysis to ensure optimal results before production.
We also support 2D CNC milling services and rapid prototyping for engineers testing form, fit, and function prior to mass production.
We have an entire manufacturing process for all product mass production, professional engineers team and the best CNC machining, thus we can control the quality and the lead time for your products for production
1- Feasibility Review
We analyze your drawings for milling feasibility and suggestions if needed.
2 – Toolpath Programming
CAM engineers program cutting paths for precision results.
3 – Material Preparation
Raw stock is selected and verified against your specified material grade.
4 – Sample Production
A first-article sample is machined and inspected against your drawing.
8 – Inspected & Packed
Full dimensional and visual check and recorded before packed and shipped.
7 – Surface Finishing
Specified finish — anodizing, plating, polishing, or painting.
6 – Full Production
Scaled to your required quantity with consistent quality.
5 – In-Process QC
Key dimensions are checked at critical production stages.
All industrial you can get CNC parts from our service, we are the best choice for you!
What is custom CNC milling?
Custom CNC milling is a subtractive manufacturing process that uses computer-controlled cutting tools to remove material from a solid block, producing precision parts to your exact design specifications. It supports complex geometries, tight tolerances, and a wide range of materials — making it ideal for prototypes, low-volume production, and high-mix manufacturing across industries such as aerospace, medical, and automotive.
What materials can be used for custom CNC milled parts?
We machine a comprehensive range of metals and engineering plastics. Metals include aluminum, stainless steel, brass, copper, titanium, alloy steel, mild steel, and low-carbon steel. Engineering plastics include POM, Nylon, ABS, PEEK, PTFE, PVC, HDPE, Polycarbonate, PMMA, and more. If you have a specific material requirement not listed, contact us — we are happy to discuss your options.
What tolerances can you achieve with CNC milling?
Our standard machining tolerance is ±0.05mm for general-purpose parts. For high-precision applications, we can achieve tolerances as tight as ±0.005mm depending on part geometry, material, and feature requirements. Critical dimensions and GD&T callouts specified in your drawing will be prioritized during production and verified through CMM inspection before shipment.
How long does it take to get a custom CNC milling quote?
For standard parts with clear 2D/3D drawings, you can receive an instant online quote within minutes. For complex parts or projects requiring DFM review, our engineering team typically responds within 24 hours. Simply upload your files in STEP, IGES, DXF, or STL format and select your material and finish requirements to get started.
What file formats do you accept for CNC milling orders?
We accept all major CAD file formats, including STEP (.stp), IGES (.igs), STL (.stl), and DXF (.dxf). STEP is our preferred format as it carries full 3D geometry and dimensional data. For turned or milled 2D profiles, DXF files work well. Please include a PDF drawing with critical tolerances, thread callouts, and surface finish requirements to ensure your parts are manufactured exactly to spec.
What is the minimum order quantity for custom CNC milling?
There is no minimum order quantity — we proudly support single-piece prototype orders through to large production runs. Whether you need one functional prototype or thousands of production parts, our facility and workflow are optimized to deliver consistent quality at any volume. Pricing scales with quantity, so larger orders benefit from reduced per-part costs.
Here are the industries for the parts you can see in different realm.
Whether it’s a small batch of complex components or mass production of standardized parts, Chiheng is fully equipped to handle diverse manufacturing demands with agility and precision.
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