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What is CNC milling?

What is CNC milling?

CNC milling uses rotational cutting tools to remove material from a workpiece to produce finished parts and products. This manufacturing process works well for many materials, including metals, polymers, wood and glass. CNC milling systems generally have 3 linear degrees of freedom: the X, Y and Z axis. This allows for top-notch precision and detailing. FortuneZest also offers more advanced, 5-degree systems, where the tool head and machining bed (A and B axis) can also rotate. 5-axis CNC machines can produce parts with high geometric complexity without needing multiple machine setups.
Learn more about CNC milling

CNC milling tolerances

We follow ISO 2768 standards for CNC machining.


Limits for nominal size

Plastics (ISO 2768- m)

Metals (ISO 2768- f)
0.5mm* to 3mm ±0.1mm ±0.05mm
Over 3mm to 6mm ±0.1mm ±0.05mm
Over 6mm to 30mm ±0.2mm ±0.1mm
Over 30mm to 120mm ±0.3mm ±0.15mm
Over 120mm to 400mm ±0.5mm ±0.2mm
Over 400mm to 1000mm ±0.8mm ±0.3mm
Over 1000mm to 2000mm ±1.2mm ±0.5mm
Over 2000mm to 4000mm ±2mm
*Please clearly indicate tolerances for nominal sizes below 0.5mm on your technical drawing.

CNC milling maximum part size

There are several types of CNC milling machines, each with its own distinct maximum part size. 3-axis and 3+2 axis machines have the lowest start-up costs and can produce parts with relatively simple geometries. 5-axis is suitable for processing irregular shapes, making the processing cost more expensive.

Size

Metric units

Imperial units
Max. part size for soft metals [1] & plastics 2000 x 1500 x 200 mm ,1500 x 800 x 500 mm 78.7 x 59.0 x 7.8 in ,59.0 x 31.4 x 27.5 in
Max. part for hard metals [2] 1200 x 800 x 500 mm 47.2 x 31.4 x 19.6 in
Min. feature size Ø 0.50 mm Ø 0.019 in
[1] : Aluminum, copper & brass [2] : Stainless steel, tool steel, alloy steel & mild steel

Size

Metric units

Imperial units
Max. part size for soft metals [1] & plastics 2000 x 1500 x 200 mm 78.7 x 59.0 x 7.8 in
Max. part for hard metals [2] 1200 x 800 x 500 mm 47.2 x 31.4 x 19.6 in
Min. feature size Ø 0.50 mm Ø 0.019 in
[1] Aluminum, copper & brass [2] Stainless steel, tool steel, alloy steel & mild steel

Size

Metric units

Imperial units
Max. part size for all materials 2000 x 1500 x 200 mm 78.7 x 59.0 x 7.8 in
Min. feature size Ø 0.50 mm Ø 0.019 in

Gallery of CNC Milling parts

Below are a small selection of the CNC machined parts and end-use components we produce for our customers.

Custom CNC Milling Aluminum 6061 Anodized black Parts
Custom CNC Milling Aluminum 6061 Anodized black Parts

Aluminum 6061 anodized black custom cnc milling pressure sensor mounting plate can be high precision and part looks aesthetically pleasing.
Drone parts
Drone parts

Drones need to minimize weight as much as possible to enhance flight efficiency, and aluminum alloy, with its low density but high strength, makes it an ideal material for fixed rotor supports.
Drone fixed bracket parts
Drone fixed bracket parts

Drones need to minimize weight as much as possible to enhance flight efficiency, and aluminum alloy, with its low density but high strength, makes it an ideal material for fixed rotor supports.
Drone bracket parts
Drone bracket parts

Drones need to minimize weight as much as possible to improve flight efficiency, and aluminum alloy, with its low density but high strength, makes it an ideal material for brackets.
Action camera rabbit cage parts
Action camera rabbit cage parts

The low density of aluminum alloy results in an overall lightweight design for the phone cage, making it easy to carry and use for extended periods without causing excessive strain for photographers.
Handheld stabilizer bracket parts
Handheld stabilizer bracket parts

The application of aluminum alloy in camera stabilizers is extensive, primarily benefiting from its lightweight, high strength, corrosion resistance, and ease of processing characteristics.

Available materials for CNC Milling

Metals

Metals

A wide range of metals for CNC machining, with applications in multiple industries. Ideal for both one-off prototypes and end-use custom parts.
Browse CNC milling metal materials
Plastics

Plastics

A wide range of plastics for CNC machining, with applications in multiple industries. Ideal for both one-off prototypes and end-use custom parts.
Browse CNC milling plastic materials

CNC milling surface finishes

Improve your part’s performance by selecting high-quality surface finishes that enhance the roughness, hardness, chemical resistance and cosmetic features of your finished component.

Name

Applicable Materials

Colors

Can be applied to
As machined

As machined

Aluminum, Steel, Stainless Steel

Ra 0.8μm - Ra 3.2μm

All post processes
Anodizing

Anodizing

Aluminum

Clear, black, grey, red, blue,green,orange,gold

Media Blasting, Tumbling, Alodine*
Chrome Plating

Chrome Plating

Acrylic

n/a

Enhanced Cosmetic Appearance
Electroless Nickel Plating

Electroless Nickel Plating

Aluminum, Steel, Stainless Steel

n/a

Media Blasting, Tumbling
Black Oxide

Black Oxide

Aluminum

Black

Bead blasted, Tumbling, Chem film*
Bead Blasted + Anodized type II

Bead Blasted + Anodized type II

Aluminum

Clear, Black, Red, Blue, Orange, Gold

Media Blasting, Tumbling, Type II Anodizing* Type III Anodizing with PTFE*
Zinc Plating

Zinc Plating

Steel, Stainless Steel

Clear (light blue coating). Black (glossy black coating).

Media Blasting, Tumbling, Passivation
Tumbling

Tumbling

Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper

n/a

All post processes, except Electropolish and Powder Coat
Nano coating

Nano coating

For applicable material processing, please refer to the catalog.

Full Coating or RAL color catalog

Please contact us for detailed instructions
Passivation

Passivation

Steel, Stainless Steel

n/a

Black Oxide, Electroless Nickel Plating, Zinc Plating, Tumbling, Media Blasting
Brushed

Brushed

Aluminum, Steel, Stainless Steel, Brass, Bronze, Copper

Small：Draw 6.5-8mm wire to 2.0-4.0mm. Medium：Draw 16-18mm wire to 8.0-12.0mm. Large：Draw 100-120mm wire to 20-30mm.

All post processes, except Electropolish and Powder Coat
Electropolishing

Electropolishing

Steel, Stainless Steel

n/a

Passivation, Tumbling
*Additional finishing options include chromic acid anodizing, cadmium plating, copper plating, titanium anodizing (blue anodizing), gold plating, silver plating, and more. For materials not listed here, please contact us directly.

Production Workshop

Our team possesses extensive knowledge and experience in the field, ensuring precision and quality in every project we undertake.

Comprehensive workshop
Comprehensive workshop

In-House Facilities: Accelerating Project Completion with Efficiency and Affordability
3D printing room
3D printing room

Quickly create prototype first board with 3D printer
Surface finishing workshop
Surface finishing workshop

We can provide high-precision metal surface treatment technology solutions and services for machined parts
CMM workshop
CMM workshop

The CMM three-coordinate measuring machine (also known as the three-dimensional coordinate measuring machine) plays a pivotal role in CNC processing, 4 units in total, accuracy 0.003mm, with the following main functions
Quality Inspection Department
Quality Inspection Department

Our in-house facilities allow us to quickly complete your project. As we have multiple CNC turning, milling and die casting equipment. Low prices and fast delivery times.
Assembly workshop
Assembly workshop

Our in-house facilities allow us to quickly complete your project. As we have multiple CNC turning, milling and die casting equipment. Low prices and fast delivery times.
Grinding machine center
Grinding machine center

The grinding machine center has 6 small grinders and 3 flat and large grinders. The equipment is produced in Taiwan and has higher precision.
Quotation Engineering Team
Quotation Engineering Team

The Quotation Engineering Team analyzes customer inquiry drawings and provides quotations, and performs CNC programming for official order drawings.

What is FortuneZest

FortuneZest is a leading CNC parts processing factory, which has been serving the high-end manufacturing industry for over 25 years. We are committed to providing precise, efficient, and customized precision parts solutions for high-end manufacturing.

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FAQs

  • Is CNC milling expensive?

    There are ways you can reduce the cost of CNC milling. If you design simple parts and utilize standard-sized tooling, you can increase the chances of successfully producing a component with minimal costs. Other CNC machining design tips include adding internal corner radii to the parts, avoiding thin walls and sections of a part and opting for bigger features instead of smaller ones.

  • What are common uses for CNC milling?

    CNC milling is one of the most accurate manufacturing techniques which makes it ideal to create complex designs. It can be used to create products such as aerospace components, furniture, medical components, prototypes, titanium pieces, and woodworking.

  • What are some common mills used in manufacturing?

    The most common mills used in manufacturing are CNC lasers, CNC lathes, CNC mills, CNC plasma cutters, and CNC routers. The CNC machine of your choice will depend on your preferred process and the type of product you want to build.

  • What is a CNC milling machine?

    A CNC milling machine is a combination of computer numerical control machining systems and a milling cutter. The milling cutter can cut parts from the workpiece with precision and accuracy to create the final product.

  • What is a CNC milling machine used for?

    CNC milling is used to manufacture products made of glass, metal, plastic, wood and custom-designed components. Machinists can produce prototypes and products for industries such as aerospace, automotive, hardware startups, manufacturing, medical devices, robotics and more.
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