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Custom CNC Milling Services
Get high-precision custom milled parts for rapid prototyping and production, with turnaround times as fast as 1 day. Our advanced CNC milling ensures accuracy (up to 0.008 mm), consistency, and efficiency to meet your project needs.
Our Precision CNC Machining Capabilities
From simple 3-axis machining to complex 5-axis projects, our precision CNC milling brings your designs to life with exceptional accuracy and craftsmanship.
3-Axis CNC Milling
Get precision and cost-efficiency with 3-axis CNC milling—perfect for simple parts that require high accuracy.
4-Axis CNC Milling
Bring your designs to life with 4-axis milling—perfect for efficient multi-sided machining with enhanced precision.
5-Axis CNC Milling
Unlock limitless possibilities for complex and intricate parts. 5-axis milling brings your most ambitious designs to reality with precision.
Types of CNC Mills
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Our CNC Milling Parts Factory
Our CNC milling Factory delivers high-precision, custom-machined components with tight tolerances and fast turnaround times.
CNC Milling Parts Gallery
Explore our CNC Milling Parts Gallery to see precision-crafted components manufactured with high accuracy and quality.
Our CNC Milling Materials
Aluminum
Lightweight yet durable, aluminum offers excellent machinability and corrosion resistance. Perfect for aerospace and automotive applications, our CNC milling service delivers precision-engineered aluminum parts to meet your exact specifications.
Surface: Polishing, brushing, anodizing, powder coating, nickel plating, fluoropolymer coating, electrophoretic coating, passivation, etc.
Price: $
Build Time: 3-10 business days
Stainless Steel
Known for its excellent corrosion resistance, strength, and durability, stainless steel is ideal for medical, aerospace, and industrial applications.
Color : Silver-gray with a natural sheen
Surface :Polishing, brushing, passivation, electropolishing, black oxide coating, powder coating, PVD coating, sandblasting, etc.
Price : $$
Build Time: :7-12 business days
Steel
A strong and versatile material with high durability, steel is widely used in industrial, automotive, and structural applications.
Color: Silver-gray
Surface: Polishing, brushing, passivation, black oxide coating, zinc plating, nickel plating, powder coating, electrophoretic coating, etc.
Price: $$
Build Time: 7-12 business days
Brass
A corrosion-resistant alloy with excellent machinability, brass is widely used in precision instruments, fittings, and decorative applications.
Color: Gold-like yellow
Surface: Polishing, brushing, passivation, nickel plating, chrome plating, tin plating, gold plating, etc.
Price: $$
Build Time: 7-12 business days
Copper
Known for its excellent electrical and thermal conductivity, copper is ideal for electrical components, heat exchangers, and precision engineering applications.
Color: Reddish-brown, with potential patina over time
Surface: Polishing, brushing, passivation, nickel plating, tin plating, silver plating, gold plating, etc.
Price: $$$
Build Time: 10-15 business days
Bronze
A strong and wear-resistant alloy with excellent corrosion resistance, bronze is ideal for bearings, marine parts, and industrial applications.
Color: Reddish-brown
Surface: Polishing, brushing, passivation, tin plating, nickel plating, black oxide coating, etc.
Price: $$$
Build Time: 7-12 business days
Titanium
Known for its exceptional strength, corrosion resistance, and biocompatibility, titanium is widely used in aerospace, medical, and high-performance engineering applications.
Color: Metallic silver-gray
Surface: Polishing, anodizing, passivation, bead blasting, nitriding, PVD coating, fluoropolymer coating, etc.
Price: $$$$
Build Time: 10-15 business days
Magnesium
Extremely lightweight yet strong, magnesium is perfect for aerospace, automotive, and electronics applications requiring high strength-to-weight ratios.
Color: Light gray with a matte or metallic finish
Surface: Polishing, anodizing, chromate conversion coating, passivation, powder coating, fluoropolymer coating, etc.
Price: $$$
Build Time: 10-15 business days
Magnesium Alloy
Lightweight yet strong, magnesium alloy offers exceptional machinability and thermal conductivity. Ideal for aerospace, automotive, and electronics applications, our CNC milling service provides precision-crafted magnesium parts using high-quality grades such as AZ31, AZ61, AZ91, and AZ92 to meet your exact specifications.
Color: Metallic gray
Surface: Polishing, brushing, anodizing, chromate conversion coating, powder coating, passivation, etc.
Price: $$$$$
Build Time: 3-10 business days
PMMA (Acrylic)
A lightweight and highly transparent plastic, PMMA offers excellent optical clarity, weather resistance, and good machinability, making it ideal for display panels, lenses, and signage.
Color: Transparent, white, black, or custom-dyed
Surface: Smooth machined finish, polishing, sanding, vapor smoothing, painting, etc.
Price: $$
Build Time: 5-7 business days
ABS
A lightweight and impact-resistant thermoplastic, ABS offers good machinability and is widely used in prototyping, consumer products, and automotive applications.
Color: Natural white, black, or custom-dyed
Surface: Smooth machined finish, sanding, painting, vapor smoothing, electroplating, etc.
Price: $
Build Time: 5-7 business days
PC (Polycarbonate)
A strong and impact-resistant thermoplastic, PC offers excellent transparency, heat resistance, and durability, making it ideal for protective covers, lenses, and mechanical components.
Color: Transparent, black, or custom-dyed
Surface: Smooth machined finish, sanding, polishing, vapor smoothing, painting, etc.
Price: $$
Build Time: 5-7 business days
PEEK
A high-performance thermoplastic with exceptional mechanical strength, heat resistance, and chemical resistance, making it ideal for aerospace, medical, and automotive applications.
Color: Natural beige, black
Surface: Smooth machined finish, polishing, sandblasting, annealing, coating options available
Build Time: 7-10 business days
PTFE (Teflon)
Known for its exceptional chemical resistance, low friction, and high-temperature tolerance, PTFE is ideal for applications in aerospace, medical, and electrical industries.
Color: White, off-white
Surface: As-fabricated, grinding, polishing available
Build Time: 6-10 business days
PA (Nylon)
A tough and impact-resistant engineering plastic with good wear resistance and self-lubricating properties, commonly used in gears, bushings, and structural components.
Color: White, black, natural
Surface: Smooth machined finish, polishing, sandblasting
Price: $$ (Medium)
Build Time: 5-7 business days
PP (Polypropylene)
A lightweight and flexible plastic with excellent chemical resistance and impact strength, commonly used in medical, automotive, and industrial applications.
Color: White, translucent, black
Surface: Smooth machined finish, polishing
Price: $$
Build Time: 7-10 business days
POM
A strong and wear-resistant engineering plastic with excellent dimensional stability and low friction, widely used in gears, bearings, and precision mechanical parts.
Color: White, black, natural
Surface: Smooth machined finish, polishing, sandblasting
Price: $$
PE (Polyethylene)
A lightweight and flexible plastic with excellent chemical resistance and low friction, commonly used in food processing, medical, and industrial applications.
Color: White, black, natural
Surface: Smooth machined finish, polishing
Price: $
Build Time: 5-7 business days
HDPE (High-Density Polyethylene)
A strong, lightweight plastic with excellent impact resistance and chemical stability, ideal for industrial, medical, and food-grade applications.
Color: White, black, natural
Surface: Smooth machined finish, polishing
Price: $$
Build Time: 7-10 business days
HIPS (High Impact Polystyrene)
A lightweight and impact-resistant plastic with good machinability, commonly used for prototypes, packaging, and enclosures.
Color: White, black, natural
Surface: Smooth machined finish, polishing
Price: $$
Build Time: 7-10 business days
LDPE (Low-Density Polyethylene)
A flexible and lightweight plastic with excellent impact resistance and chemical stability, ideal for containers, liners, and soft-touch components.
Color: Translucent, white, black, natural
Surface: Smooth machined finish, limited polishing
Price: $$
Build Time: 7-10 business days
PBT (Polybutylene Terephthalate)
A strong, stiff, and chemically resistant thermoplastic with excellent electrical insulation properties, ideal for automotive and electronic components.
Color: White, black, natural, various custom colors
Surface: Smooth machined finish, limited polishing
Price: $$
Build Time: 7-10 business days
PPA (Polyphthalamide)
A high-performance thermoplastic with excellent mechanical strength, heat resistance, and chemical stability, ideal for automotive, aerospace, and industrial applications.
Color: Natural, black, various custom colors
Surface: Smooth machined finish, limited polishing
Price: $$
Build Time: 7-10 business days
PAI (Polyamide-imide)
An ultra-high-performance thermoplastic known for its exceptional mechanical strength, thermal stability, and wear resistance, making it ideal for aerospace, automotive, and industrial applications.
Color: Natural amber, black
Surface: Smooth machined finish, limited polishing
Price: $$$
Build Time: 7-10 business days
PET (Polyethylene Terephthalate)
A strong, lightweight, and wear-resistant plastic with excellent dimensional stability and low moisture absorption, commonly used in food packaging, electronics, and mechanical components.
Color: Transparent, white, black
Surface: Smooth machined finish, polishing available
Price: $$
Build Time: 5-10 business days
PPS (Polyphenylene Sulfide)
A high-performance engineering plastic known for its excellent chemical resistance, thermal stability, and mechanical strength, making it ideal for aerospace, automotive, and electronic components.
Color: Natural (beige), black
Surface: Smooth machined finish, polishing available
Price: $$$
Build Time: 5-10 business days
PS (Polystyrene)
A lightweight and rigid plastic with good machinability, commonly used for prototyping, packaging, and insulation applications.
Color: Transparent, white, black, various colors available
Surface: Smooth machined finish, polishing available
Price: $
Build Time: 5-10 business days
PVC (Polyvinyl Chloride)
A durable and versatile plastic with excellent chemical resistance, commonly used for industrial, construction, and electrical insulation applications.
Color: White, gray, black, various colors available
Surface: Smooth machined finish, polishing available
Price: $
Build Time: 5-10 business days
UPE
A durable plastic known for its excellent wear resistance, low friction, and high impact strength, making it ideal for industrial and medical applications.
Color: White, black, natural
Surface: Smooth machined finish, polishing available
Price: $$
Build Time: 5-10 business days
Bakelite
A rigid, heat-resistant, and electrically insulating material, making it ideal for electrical components, mechanical parts, and tooling applications.
Color: Brown, black, reddish-brown
Surface: Smooth machined finish, matte texture
Price: $$
Build Time: 5-10 business days
CNC Milling Surface Finishes
Enhance the look and durability of your custom CNC milled parts with high-quality surface finishing. Our finishes not only eliminate aesthetic imperfections but also provide added protection, resistance, and strength to your products.
| Surface Finish | Color | Description | Materials |
|---|---|---|---|
As-Machined
| N/A | Parts retain visible tool marks from the machining process. | Metals, Plastics |
Anodizing
| Clear, Black, Custom | An electrochemical process that forms a corrosion-resistant oxide layer. | Aluminum |
Sand Blasting
| Matte Gray | Uses abrasive blasting to create a smooth, matte surface. | Metals, Plastics |
Powder Coating
| Custom Colors | A durable and uniform color coating applied via electrostatic spraying. | Metals, Plastics |
Electropolishing
| Shiny Metal | A process that smooths and brightens the surface by electrochemical polishing. | Stainless Steel, Aluminum |
Brushing
| Metallic | Produces a satin finish with consistent brush marks for a uniform grain. | Metals |
Polishing
| High Gloss | A buffing process that results in a high-gloss, mirror-like finish. | Metals, Plastics |
Electroplating
| Silver, Gold, Nickel | Adds a thin metallic layer to enhance durability and appearance. | Steel, Copper, Brass |
Black Oxide
| Black | Creates a black coating that provides mild corrosion resistance. | Steel, Stainless Steel |
Passivation
| N/A | A chemical treatment that improves corrosion resistance, mainly for stainless steel. | Stainless Steel |
Heat Treatment
| N/A | A controlled heating and cooling process to modify material properties like hardness. | Steel, Aluminum, Titanium |
Precision CNC Milling for Your Custom Parts
Get high-quality, tight-tolerance CNC-milled parts with fast turnaround. Upload your design today!
Tolerances for CNC Milling
GS Proto guarantees precision with strict CNC milling tolerances, delivering accurate and consistent results. We follow ISO 2768-m for metals and ISO 2768-c for plastics, ensuring high-quality standards optimized for performance and reliability.
| 3-Axis | 4-Axis | 5-Axis | |
|---|---|---|---|
| Maximum Part Size | 3000 × 1800 × 800 mm | 850 × 510 × 600 mm | 925 × 1050 × 600 mm |
| Minimum Part Size | 5 x 5 x 5 mm | 5 x 5 x 5 mm | 5 x 5 x 5 mm |
| General Tolerances | ± 0.05 mm | ± 0.02 mm | ± 0.01 mm |
| Lead Time | Simple parts can be delivered in as little as 1 day. | Most projects are completed within 3 business days. | Most projects are delivered in 3 business days. |
What is CNC Milling?
CNC mills are automated machines with a rotating spindle that cuts materials like plastic, aluminum, stainless steel, and titanium, making them ideal for machining harder metals.
Controlled by G-Code from CAM software, they define tool movement, speed, depth, and feed rate based on axis configuration, with complex machines requiring intricate coding.
While capable of cutting soft materials, CNC mills are less cost-effective than CNC routers, which hold the workpiece stationary while the cutting head moves.
Common in industrial manufacturing, CNC mills differ from routers, which are preferred for woodworking and low-volume production.
Applications of CNC Milling
Rapid Prototyping
With a wide range of materials, low per-unit costs, and fast production, CNC machining is an excellent choice for prototyping.
End-Use Production
CNC machining is a top choice for end-use parts due to its high-quality finish, wide material selection, and precise tolerances.
Rapid Tooling
CNC machining works with nearly any material, making it ideal for rapid tooling, such as producing fixtures or molds.
How to Work with GS Proto
GS Proto CNC milling services offer a seamless process, from CAD design submission to production, ensuring precision and quality at every step.
Reliable CNC Milling Services at GS Proto
From prototypes to production, we deliver accurate and consistent CNC-milled parts. Start your project now!
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