This article will help you clarify the differences between the two in terms of processing principles, applicable parts, material range, precision tolerances, advantages and disadvantages, and assist you in making more reasonable judgments in product design and selection.
1, What is CNC turning?
CNC turning refers to the machining method in which the workpiece rotates and the tool moves in a straight line. The parts are clamped on the lathe spindle and rotate at high speed. The turning tool moves axially or radially to cut off excess material and form the desired cylindrical features.
Typical parts
Shaft, pin, and liner
Threaded parts, nuts
Motor rotor, pulley
Circular shell, pipe fittings
Common Materials
Aluminum alloy (6061, 7075)
Steel (45 #, 304 stainless steel)
Copper, brass
Engineering plastics (POM, nylon PTFE)
2, What is CNC milling?
CNC milling refers to a machining method where the tool rotates and the workpiece is fixed or moved. The milling cutter rotates at high speed under the drive of the spindle, and cuts the workpiece through multi-directional movement of the X, Y, and Z axes, which can produce complex structures such as flat surfaces, grooves, curved surfaces, and hole systems.
Typical parts
Shell and cover plate
Bracket, connector
Mold and cavity
Alien structural components
Common Materials
Aluminum alloy, magnesium alloy
Stainless steel, titanium alloy
Copper, bronze
Engineering plastics, composite materials
3, Comparison of core differences
|
Comparison items: |
CNC turning | CNC milling |
|
Movement mode: |
workpiece rotation, tool movement | tool rotation, workpiece movement |
| Part shape: | Rotating body (cylindrical, conical) | square, irregular, complex structure |
| The number of axes is | usually 2-3 | usually 3-5 |
|
Processing features include |
outer circle, inner hole, end face, | threaded plane, groove, hole system, curved surface, and cavity |
|
Clamping method: |
Chuck clamping pliers | pressure plate, fixture |
4, Their respective advantages and limitations
The advantages of CNC turning
The efficiency of processing rotary parts is extremely high
Easy to ensure concentricity and cylindricity
Suitable for large-scale production
The cost of cutting tools is relatively low
Limitations of CNC Turning
Only capable of processing symmetrical rotating bodies
Complex structures require secondary milling and machining
The advantages of CNC milling
Capable of processing complex geometric shapes
Suitable for multi-faceted, porous, and cavity type parts
Can complete multiple processing steps in one clamping operation
Limitations of CNC milling
Processing efficiency lower than turning
Difficulty in processing thin-walled and slender parts
6, How to choose?
Recommended Process for Part Features
Cylindrical, symmetrical, CNC turning with outer circle/inner hole
Square, irregular, and complex surface CNC milling
Both outer circle and installation hole/groove car milling composite processing
7, Frequently Asked Questions (FAQ)
Q1: Can the same part be processed using two different processes simultaneously?
Of course. Many parts will first use turning to process the outer circle and inner hole, and then use milling to process the plane and hole position, which is the "turning milling composite" process.
Q2: Which process has higher precision?
Both can achieve high precision. Turning has more advantages in roundness, while milling is more flexible in position and flatness.
Q3: Is there a material that can only be processed using one technique?
Most materials can be processed with both. Both soft materials (such as aluminum, copper, plastic) are suitable; Hard materials such as quenched steel and titanium alloys need to be processed appropriately according to their shape.
summary
There is no absolute superiority or inferiority between CNC turning and CNC milling, the key lies in the shape of the parts and the machining requirements. As a professional machining service provider, we recommend considering the manufacturability of parts during the design phase and selecting processes reasonably to ensure quality and control costs.
Shenzhen StrongD Model has multiple CNC lathes, machining centers, and turning milling composite equipment, providing you with one-stop precision machining services from prototype to batch. Welcome to send drawings for consultation, we will recommend the best processing solution for you.
