Custom CNC Milling Services
High-precision CNC milling for everything from rapid prototyping to full-scale production. Koonze Model delivers consistent, efficient machining across a wide range of metals and plastics—helping you speed up development and delivery.
- ±0.01 mm tolerance for precise, consistent results
- Handles complex geometries and tight features with ease
- Low minimum order quantities and lead times as fast as 2 days
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Our High-Quality CNC Milling Services
From 3-axis to 5-axis machining, we bring your designs to life with tight tolerances and clean finishes—every time.
For parts that are simple but can’t afford to be sloppy, 3-axis CNC milling delivers precision without breaking the budget.
Got a complex part? 4-axis milling simplifies multi-sided machining and makes your design easier to produce.
When it comes to complex, high-precision parts, 5-axis milling unlocks possibilities—perfect for your most advanced designs.
Precision CNC Milling Factory
Our factory is equipped with advanced CNC milling machines to deliver parts with the highest accuracy and quality. Whether you need low-volume prototypes or large-scale production, we ensure efficient and reliable manufacturing.
Get an Free CNC Milling Quote
Upload your CAD files and receive a fast, accurate quote—no minimum order required. Experience Koonze Model’s precision and reliability today.
Materials for CNC Milling
Metal
Aluminum
Aluminum is a versatile, lightweight metal favored in CNC machining for its excellent machinability, strength-to-weight ratio, and corrosion resistance. It provides high precision and smooth finishes, ideal for intricate components in automotive, aerospace, and electronics.
- Aluminum 2024
- Aluminum 5052
- Aluminum 5083
- Aluminum 6061
- Aluminum 6061-T6
- Aluminum 6063
- Aluminum 6082
- Aluminum 7075
- Aluminum 7075-T6
Copper
Excellent thermal and electrical conductivity, corrosion resistance, and ease of machining. Ideal for electrical and heat exchanger components.
- Beryllium Copper
- Copper C101 (T2)
- Copper C103 (T1)
- Copper C103 (TU2)
- Copper C110 (TU0)
Brass
Good machinability, corrosion resistance, and electrical conductivity. Typically used for decorative and electrical components.
- Brass C27400
- Brass C28000
- Brass C36000
Bronze
Highly durable, corrosion-resistant, and resistant to wear. Commonly used for bearings and bushings.
- Tin Bronze
Steel
Strong, durable, and versatile. It’s commonly used for structural components, machinery parts, and tools.
- Steel 1018
- Steel 1020
- Steel 1025
- Steel 1045
- Steel 1215
- Steel 4130
- Steel 4140 / 42CrMo
- Steel 4340
- Steel 5140
- Steel A36
- Steel ST37
- Alloy Steel 4J36
- Die Steel 718H
- Die Steel P20
- Die Steel S136
- Die Steel S7
- Chisel Tool Steel D2 / SKD11
- Chisel Tool Steel SKD61
- Cold Rolled Steel DC-01
- High Speed Steel SKH51
- Spring Steel 1566
- Spring Steel 9260
- Tool Steel A2
- Bearing Steel E51100 / SUJ1
- Bearing Steel E52100 / SUJ2
Stainless Steel
- Stainless Steel AISI 304
- Stainless Steel SUS201
- Stainless Steel SUS303
- Stainless Steel SUS 304
- Stainless Steel SUS316
- Stainless Steel SUS316L
- Stainless Steel SUS420
- Stainless Steel SUS430
- Stainless Steel SUS431
- Stainless Steel SUS440C
- Stainless Steel SUS630 / 17-4PH
Magnesium
Magnesium alloy is a lightweight, high-strength material known for its excellent machinability and corrosion resistance, often used in aerospace, automotive, and electronics applications for its low weight-to-strength ratio.
- Magnesium Alloy AZ31B
- Magnesium Alloy AZ91D
Titanium
Titanium alloy is a high-strength, corrosion-resistant material with excellent fatigue resistance and heat tolerance, commonly used in aerospace, medical, and automotive applications for its durability and lightweight properties.
- Titanium Alloy TA1
- Titanium Alloy TA2
- Titanium Alloy TC4/Ti-6Al 4V
Plastics
ABS
ABS is durable, heat-resistant, and impact-resistant. Lightweight and easy to process, it is an ideal material for automotive parts and consumer goods where both durability and cost-effectiveness are key considerations.
- ABS Beige (Natural)
- ABS Black
- ABS Black Antistatic
- ABS Milky White
PC
High impact resistance, transparent, and excellent for high-stress applications. Often used in protective covers and optical components.
- Flame Retardant Transparent PC
- Food Grade PC-Transparent
- PC Black
- PC Transparent
- PC White
- PC Yellowish White
PC+GF30
PC+GF30 is a composite material made by reinforcing polycarbonate with 30% glass fiber, offering enhanced strength, stiffness, and heat resistance, suitable for high-performance applications requiring durability and stability.
- PC+GF30 Black
PMMA
Transparent, lightweight, and resistant to UV and weathering. Commonly used for visual parts like displays and light covers.
- PMMA Black
- PMMA Transparent
- PMMA White
POM
POM is durable and features a low-friction surface, making it ideal for precision components such as gears and bearings, where precise fit and smooth operation are essential.
- Dark brown (coffee) POM 100AF
- POM Black
- POM Blue
- POM White
PA (Nylon)
Nylon is highly versatile, durable, and resistant to wear, making it a popular choice for gears, bearings, and other components that endure continuous friction and heat without degrading.
- PA (Nylon) Blue
- PA6 (Nylon) + GF15 Black
- PA6 (Nylon) + GF30 Black
- PA66 (Nylon) Beige (Natural)
- PA66 (Nylon) Black
PE
Lightweight, chemical-resistant, and low-friction. Ideal for fluid handling parts and food-grade applications.
- PE Black
- PE White
PP
Chemical resistance, low moisture absorption, and high fatigue resistance. Often used in packaging, automotive, and medical applications.
- PP Black
- PP White
PP+GF30
PP+GF30 (Polypropylene with 30% Glass Fiber) combines lightweight, excellent chemical resistance, and improved strength, making it ideal for CNC machining in automotive, industrial, and electrical components requiring durability and performance.
- PP+GF30 Black
PEEK
PEEK is a high-strength material that maintains its durability even at elevated temperatures. Commonly used in high-performance industries such as aerospace and medical implants, it is designed to withstand extreme conditions.
- PEEK Beige (Natural)
- PEEK Black
PTFE
PTFE is chemically resistant, has low friction, and remains stable at high temperatures. It is commonly used in non-stick coatings, gaskets, and seals, where reliable performance under harsh conditions is essential.
- Teflon (PTFE) Black,
- Teflon (PTFE) White
PVC
Durable, chemical-resistant, and versatile. Used for piping, fittings, and electrical insulation.
- PVC Grey
PPS
PPS is resistant to heat and chemicals, making it ideal for automotive, aerospace, and industrial components that must maintain strength and stability in harsh environments.
- PPS Black
- PPS White
PPS+GF30
PPS+GF30 is a high-performance material with excellent chemical resistance, high temperature stability, and improved strength due to the addition of 30% glass fiber, making it ideal for demanding CNC applications.
- PPS+GF30 Black
PPS+GF31
PPS+GF31 is a high-performance material offering excellent thermal stability, chemical resistance, and mechanical strength, enhanced with 31% glass fiber reinforcement for increased durability and rigidity in demanding CNC applications.
- PPS+GF30 White
HDPE
HDPE is exceptionally strong and impact-resistant, offering a high strength-to-density ratio. It is perfect for products like bottles, containers, and pipes that must endure outdoor exposure and rough handling.
- HDPE Black
- HDPE White
PET
PET is durable, moisture-resistant, and recyclable. It is commonly used in food containers, bottles, and textiles, offering long-lasting resistance to wear and tear.
- PEI Amber
- PEI Amber(ULTEM1000)
- PEI Black(ULTEM1000)
PET+GF30
PET+GF30 (Polyethylene Terephthalate with 30% Glass Fiber) combines the durability and strength of PET with improved stiffness and heat resistance, ideal for precision CNC machining in automotive, electrical, and industrial applications.
- PET+GF30 Black
PET+GF31
PET+GF31 (Polyethylene Terephthalate with 31% Glass Fiber) offers enhanced strength, rigidity, and thermal stability, making it suitable for high-performance CNC applications in automotive, industrial, and electronic sectors.
- PET+GF30 White
ABS+PC
ABS+PC is a durable, impact-resistant material combining the strength of ABS with the heat resistance and transparency of polycarbonate, ideal for automotive, electronics, and consumer product applications.
- ABS+PC Black
- ABS+PC White
Bakelite
Bakelite is a durable, heat-resistant thermosetting plastic, ideal for electrical insulators, tool handles, and industrial applications requiring strong mechanical and thermal properties.
- Bakelite Black
- Bakelite Orange
Epoxy plate
Epoxy plate offers excellent strength, heat resistance, and electrical insulation, making it ideal for aerospace, electronics, and industrial applications requiring durability and stability.
- FR-4 Aqua Green
- FR-4 Yellow
HIPS
HIPS (High Impact Polystyrene) is a durable, impact-resistant plastic used in CNC machining, offering excellent dimensional stability and ease of processing, suitable for applications requiring strength and flexibility.
- HIPS Board White
LDPE
LDPE (Low-Density Polyethylene) is a flexible, low-density plastic commonly used in CNC machining for applications requiring low strength, high chemical resistance, and ease of fabrication, ideal for packaging and insulation.
- LDPE White
PAI
PAI (Polyamide-imide) is a high-performance engineering plastic known for its excellent thermal stability, wear resistance, and chemical resistance, commonly used in demanding CNC applications requiring durability and strength.
- PAI Brown
PBT
PBT (Polybutylene Terephthalate) is a strong, durable thermoplastic known for its excellent electrical insulation, chemical resistance, and dimensional stability, often used in automotive and electronic components for CNC machining.
- PBT Black
- PBT Milky White（Natural）
PEI
PEI (Polyetherimide) is a high-performance thermoplastic known for its excellent mechanical strength, heat resistance, and electrical properties, making it ideal for demanding applications in aerospace, automotive, and electronics industries.
- PEI Amber
- PEI Amber(ULTEM1000)
- PEI Black(ULTEM1000)
PPA
PPA (Polyphthalamide) is a high-performance engineering plastic known for its excellent heat resistance, chemical stability, and mechanical strength, making it ideal for CNC machining in demanding automotive and industrial applications.
- PPA Beige
PS
PS (Polystyrene) is a lightweight, rigid plastic known for its ease of machining and cost-effectiveness. It is commonly used in CNC applications for prototypes and low-stress parts requiring moderate impact resistance.
- PS Transparent
UPE
UPE (Ultra-High Molecular Weight Polyethylene) offers excellent wear resistance, low friction, high chemical resistance, and is ideal for heavy-duty CNC applications that require durability and impact resistance.
- UPE Black
- UPE White
Note: The materials listed above are for reference only. We offer over 100 different materials – please contact us now to find the best option for your needs.
Various Surface Finishes Available
Anodizing
Anodizing enhances corrosion resistance and wear properties, while also enabling color dyeing, making it perfect for aluminum parts.
Bead Blasting
Uses fine beads to produce a consistent matte finish, improving the part’s texture and visual appeal. This process is ideal for parts that require enhanced aesthetics or a better grip.
Brushed Finish
A surface treatment process that involves polishing the material with fine abrasive brushes to achieve a uniform, satin-like finish. This technique is commonly applied to stainless steel and aluminum.
Chrome Plating
A thin layer of chromium is deposited on the surface to improve corrosion resistance, increase hardness, and enhance visual appeal. This treatment is frequently utilized in automotive and industrial components.
Electropolishing
A process that employs electrochemical techniques to polish metal surfaces, resulting in reduced surface roughness, enhanced corrosion resistance, and a bright, reflective finish.
Hard Anodizing
An advanced type of anodizing that produces a thicker and more resilient oxide layer, significantly enhancing wear and corrosion resistance. This process is commonly applied to military and aerospace components.
Powder Coating
A dry finishing technique that involves applying and curing a powder to achieve a durable and visually appealing surface. This process provides exceptional resistance to corrosion, scratching, and fading.
Polishing
A mechanical process that utilizes abrasives to refine a surface, resulting in a smooth, shiny, and reflective finish. This technique is commonly employed on metals such as aluminum, stainless steel, and brass.
Sandblasting
Utilizes a high-pressure stream of abrasive particles to clean or texture a surface, resulting in a well-prepared area for coating or a consistent finish. This method is commonly employed for achieving uniform surface characteristics.
Textured Finish
A range of techniques designed to produce a textured surface, enhancing grip, visual appeal, or friction resistance. This approach is frequently applied to handles and exterior components.
Clear Coating
A transparent protective coating applied to surfaces that safeguards against corrosion, wear, and environmental damage while preserving the original appearance of the part.
Black Oxide
A conversion coating that imparts a black finish to metal parts, primarily enhancing corrosion resistance and providing an attractive appearance, commonly utilized for steel components.
Heat Treatment
A process involving the heating and cooling of metals to modify their physical and mechanical properties, resulting in enhanced hardness, increased strength, and improved wear resistance.
Nickel Plating
A nickel coating applied to metal parts that enhances corrosion resistance, increases hardness, and improves wear resistance, commonly utilized in automotive and industrial applications.
Zinc Plating
A protective zinc coating applied to steel parts that effectively prevents rusting, providing enhanced durability and longevity. This treatment is commonly used for fasteners, hardware, and automotive components.
Titanium Coating
A thin titanium layer applied to components that significantly enhances wear resistance, corrosion resistance, and surface hardness, making it ideal for high-performance applications.
Tolerances for CNC Milling
Koonze Model delivers consistent, high-quality results through strict CNC milling tolerances. We follow ISO 2768-m standards for metals and ISO 2768-c for plastics—ensuring precise measurements that meet client expectations and boost search visibility.
| 3-Axis | 4-Axis | 5-Axis | |
|---|---|---|---|
| Maximum Part Size | 1000 x 500 x 500 mm | 1000 x 500 x 500 mm | 4000 × 1500 × 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 | ± 0.1 mm | ± 0.1 mm | ± 0.05 mm |
| Lead Time | Delivery of simple parts can be as fast as 1 day. | 5 bussiness days for most projects. | 5 bussiness days for most projects. |
| 3-Axis | 4-Axis | 5-Axis | |
|---|---|---|---|
| Maximum Part Size | 1000 x 500 x 500 mm | 1000 x 500 x 500 mm | 4000 × 1500 × 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 | ± 0.1 mm | ± 0.1 mm | ± 0.05 mm |
| Lead Time | Delivery of simple parts can be as fast as 1 day. | 5 bussiness days for most projects. | 5 bussiness days for most projects. |
CNC Milling Design Guidelines
| Recommended Size | |
|---|---|
| Radii | Internal radii should be at least 1/3 of the cavity depth. Use larger radii whenever possible. |
| Threads and Tapped Holes |
Diameter Φ 1.5-5 mm, depth: 3 times the diameter.
Diameter Φ 5 mm or larger, depth: 4-6 times the diameter. Koonze Model can produce threads of any specification and size as required by the customer. |
| Minimum wall thickness | For metals: 0.8 mm; For plastics: 1.5 mm. Thicker walls ensure better structural integrity. |
| Text |
CNC Milling: Minimum width of 0.5 mm and depth of 0.1 mm.
Koonze Model can create standard text via CNC engraving or laser engraving as per customer requirements. |
| Holes | Minimum diameter of 1 mm. Hole depth should not exceed 4 times the diameter for best results. |
| Recommended Size | |
|---|---|
| Radii | Internal radii should be at least 1/3 of the cavity depth. Use larger radii whenever possible. |
| Threads and Tapped Holes | Diameter Φ 1.5-5 mm, depth: 3 times the diameter. Diameter Φ 5 mm or larger, depth: 4-6 times the diameter. Koonze Model can produce threads of any specification and size as required by the customer. |
| Minimum wall thickness | For metals: 0.8 mm; For plastics: 1.5 mm. Thicker walls ensure better structural integrity. |
| Text | CNC Milling: Minimum width of 0.5 mm and depth of 0.1 mm. Koonze Model can create standard text via CNC engraving or laser engraving as per customer requirements. |
| Holes | Minimum diameter of 1 mm. Hole depth should not exceed 4 times the diameter for best results. |
Applications of CNC Milling
CNC works with nearly any material, making it ideal for rapid tooling such as fixtures and molds.
With a wide range of material options, low per-unit costs, and fast turnaround, CNC machining is an excellent choice for prototyping.
CNC is a top choice for end-use parts thanks to its high-quality finishes, broad material compatibility, and tight tolerances.
Why Choose Koonze Model for CNC Milling
High Precision
Achieve ± 0.008 mm accuracy—ideal for complex geometries and tight-tolerance components
Scalable Production
Reliable quality from one-off prototypes to 100,000+ parts
Wide Material Compatibility
Over 100 types of metals and plastics available to match any project requirements
Talk to a CNC Expert
Need help with material selection or tight tolerances? Our engineers are ready to support your project from prototype to production.
Case Studies
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FAQs About Our CNC Milling Services
CNC Milling Resources
