CNC milling service

Functional & end-use parts . Plastics & Metals . 3- & 5 axis machines . Finishes

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What is CNC milling?

CNC milling is a manufacturing process that uses a cutting tool mounted on a rotating spindle to selectively remove material from a block of raw substrate. The workpiece is rigidly mounted to a table, and this table moves or rotates on different planes so the tool can work at many angles. Sophisticated machines can have 5 or more axes of independent motion for advanced applications.

IN3DTE provides CNC Milling services in China by using a various of 3 axis, 4 axis and 5 axis milling machines.

How does CNC milling works?

CNC milling is a subtractive manufacturing process. It starts by fixturing a block of metal or plastic material inside the CNC mill. Using G-code, the CNC Machine is programmed to rapidly mill out parts from the block of raw material. 

Machined plastic parts are left as-milled, which typically means they show visible tool marks. Some metal parts allow more finishing choices like anodizing and chromate plating. When the run is complete and your required surface finish is applied, parts are boxed and shipped shortly thereafter.

CNC Milling Types & Tolerance

The most widely used type of CNC milling machine. The full use of the X, Y, and Z directions makes a 3 Axis CNC mill useful for a wide variety of work.

This type of router allows the machine to rotate on a vertical axis, moving the workpiece to introduce more continuous machining.

These machines have three traditional axes as well as two additional rotary axes. A 5-axis CNC router is, therefore, able to machine 5 sides of a workpiece at in one machine without having to remove the workpiece and reset. The workpiece rotates, and the spindle head is able to also move around the piece. These are larger and more expensive.

Part size / DimensionToleranceAngularity
< 12’’ (300 mm)± .005’’ (0.125 mm)± 0.5°
< 24’’ (600 mm)± .010’’ (0.250 mm)± 1.0°
< 36’’ (900 mm)± 1/64’’ (0.400 mm)± 1.0°

Available CNC Milling Materials

ABS, Acetal, Acrylic, HDPE, NYLON, NYLON+GF, PC, PEI, PAI, PEEK, PMMA, POM, PPS, PPSF, UHMW and more

Aluminum, Brass, Copper, Low-carbon steel, Stainless steel 304, 316 and more, Magnesium alloy, Titanium, Zinc alloy

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CNC Milling Services in China

CNC Milling Design Guide

0.5mm for metals

1.0mm for plastics

Available surface finishes for CNC Milling

China CNC Metal Manufacturer

As machined

~125 RA µin (3.2 RA µm). Minor tool marks will be visible on the part.

CNC Machining Service

Anodizing

It helps to resist corrosion, increase surface hardness, improve resistance to wear, and dissipate heat. Available in a variety of colors. Type II, Type III

China CNC Metal Manufacturer

Painting & color matching

We can match the standard Pantone color, paint it into glossy, matte finish, and more options.

CNC Milling Services in China

Blasting & polish

Bead blasting & Electropolishing add a uniform smooth surface on a machined part. Removing all the tool maks.

CNC Machining Service

Black oxide

Black oxide is a conversion coating used to improve corrosion resistance and minimize light reflection.

China CNC Metal Manufacturer

Brushing

It helps to resist corrosion, increase surface hardness, improve resistance to wear, and dissipate heat. Available in a variety of colors. Type II, Type III

CNC Machining Service

Vapor polishing

This is a specialized treatment for achieving optical clarity on polycarbonate (PC) plastic. This method is ideal for achieving an extremely clear surface on complex geometries or hard to reach areas.

China CNC Metal Manufacturer

Heat treatments

Annealing, Carburizing, Cryogenic Treatment, Induction Hardening, Nitriding

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