CNC turning service

Functional & end-use parts . Plastics & Metals . As fast as 1 day

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What is CNC Turning

CNC turning is a subtractive manufacturing process that rotates a metal rod while a cutting tool is held against the stock to remove material and create final parts. At our factory, CNC lathes are also equipped with live tooling that can machine flat features and holes into the workpiece. Outside diameter (OD) and inside diameter (ID) threading is also available.

Turned parts can then be left as-machined, with visible tool marks, or bead blasted, Anodizing, Black oxide.

How does CNC turning works?

5 easy steps for making the CNC turned parts

1. Get the G-code file ready( from the 3D file)

2. Load the material: A blank bar of plastics or metals

3. Use the Chuk holds the workpiece in place while the spindle spins

4. When the spindle is up to speed, a stationary cutting tool is brought into contact with the workpiece to remove material until the desired geometry is achieved.

5. When all machining operations are completed the part will be cut from the stock for further surface finishes.

What metals can be machined by CNC router?

Aluminum 

Aluminum is considered to be the most popular and cost-effective metal when it comes to CNC Machining. This is because it has high machinability, lightweight but strong.

Al6061 is an economical grade that offers fantastic workability and machinability. It is seen as a general-purpose grade material.

Stainless Steel

Whilst it does not have the same high machinability as Aluminum, stainless steel still does maintain good machinability. More robust and with more chemical resistance than Aluminum makes, it is also a trendy material in CNC machining services.

SS304 and SS306 grades are the two most commonly used ones.

Alloy Steel

Alloy steel is a low alloy steel that contains manganese, chromium, and molybdenum. It has high fatigue strength toughness, and impact resistance properties, making it an attractive alloy for many applications and industries. This alloy is more cost-effective compared to stainless steel.

Titanium

As the most expensive metal in the CNC metals family. Titanium…

Click HERE to read more…

Metals in CNC Machining

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 Machining

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
$$$$

How to select the right CNC plastics?

ABS is one of the most common thermoplastic materials offering good mechanical properties, excellent impact strength, high heat resistance and good machinability.

Polycarbonate is a thermoplastic with high toughness, good machinability and excellent impact strength (better than ABS). It can be colored, but typically it is optically transparent, making it ideal for a wide range of applications, including fluidic devices or automotive glazing.

POM is commonly known with the commercial name Delrin, and it is an engineering thermoplastic with the highest machinability among plastics.

POM (Delrin) is often the best choice when CNC machining plastic parts that require high precision, high stiffness, low friction, excellent dimensional stability at elevated temperatures, and very low water absorption.

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CNC Turning Design Guide

Metals: 0.5mm Minimum, 0.8mm recommended

Plastics: 1.0mm Minimum, 1.2mm recommended

Min. 0.5mm, 2mm recommended 

0.25 mm

M2 Minimum, M6 recommended

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CNC Milling Services in China

Available surface finishes for CNC Turning

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 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.

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

Our Manufacturing Serivces