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.

Metals in CNC Milling Service

What kind of metals are used for milling operations? The metals used for milling are steel, brass, aluminum, nickel, titanium, etc. Milling represents the process of machining using rotary cutters to eliminate material by advancing a cutter through a workpiece. Let’s go through the CNC milling metal material properties to select a suitable material for your projects.

Material Name Grade Ultimate tensile strengh(Mpa) Elongation at break(%) Hardness(HRB) Chemical resistance
Aluminum
6061-T6
291-320
12-17
60
High
Aluminum
7075-T6
430-580
3-11
80
Moderate
Aluminum
7050
500-550
11
147
Good
Aluminum
6063
110-300
12
25-95
High
Aluminum
2024
200-540
14-20
70-120
Poor
Stainless Steel
304/304L
480-620
45-60
75=83
Good
Stainless Steel
316/316L
480-620
30-50
75-83
Excellent
Stainless Steel
17-4PH
896-990
7
250-260
Excellent
Mild Steel
1018
190-440
17-27
76
Poor
Mild Steel
1045
620-680
13-18
84
Poor
Alloy Steel
4140
915-1130
13.5-21
275-335HV
Moderate to Poor
Alloy Steel
4340
670-820
17-27
200-245HV
Moderate to Poor
Tool Steel
D2
2100-2500
13-15
58-64
Excellent
Tool Steel
A2
2040-2360
3.5-6.1
57-62
Excellent
Tool Steel
O1
2040-2360
3.5-6.1
57-62
Excellent
Brass
C360
140
23
-
Moderate
Copper
110
220-230
15-50
40 HRF
Moderate to poor
Copper
101
310-380
6-25
27 HV
-

Plastics in CNC Milling Service

What plastic is good for CNC Machining? There are many types of plastics in CNC Milling. The most common plastics in CNC milling are Derlin(POM), PC, ABS etc. Let’s go through the CNC milling plastics’ properties to select a suitable material for your projects.

Material Density(g/cm^3) Tensile Strength ( Mpa) Flexural strength (Mpa) Wear Resistance Elongation at break (%) Heat Resistance (0.45Mpa, °C) Cost
ABS
1.04
37
67
Poor
8
80
$
PC
1.2
75
-
Poor
75
110
$$
Nylon6/66
1.15
80
100
Excellent
50
90
&&&
Nylon6/66+GF
1.36
185
270
Excellent
3
205
$$$$
POM ( Derlin/Acetal)
1.39
67
-
Good
28
-50/110
$$
PMMA(Acrylic)
1.19
72
-
Poor
8
75
$
PP
0.9
36
-
Good
9
-5/85
$
PE-UHMW/HDPE
0.93
20
27
Poor
50
-140/80
$
PVC
1.36
50
80
Poor
29
-15/70
$$
PTFE
2.16
26
-
Good
300
-150/250
$$$$
PEI
1.27
110
170
Good
30
215
$$$
PEEK
1.32
115
170
Excellent
16
250
$$$$

CNC Milling Types

What’s the difference between 3-axix, 4-axis and 5-axis milling?

 

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.

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3d Printing Prototype Service

Download Guid for Designing for CNC Milling

  • Remember the minimum principle, such as Minimum wall thickness, thread, fonts, holes
  • What are the main restrictions of CNC design?
  • CNC machine setups and parts orientation
  • Free Design Guides

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.

Anodizing

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