4 Axis vs 5 Axis Machining: What’re the Differences

4 axis vs 5 axis machining, how much do you know? There are different types of machines available, each with its own unique capabilities and benefits. Two popular options are 4-axis and 5-axis CNC machines. While both can produce high-quality results, there are significant differences between the two that can impact the type of work they're best suited for.
4 axis vs. 5 axis machining

4 axis vs 5 axis machining, how much do you know? In this blog post, we’ll explore the differences between 4-axis and 5-axis CNC machining, including their strengths and weaknesses, to help you choose which one is right for your next project. Since we have over ten years in this field, let’s take a closer look.

What Is 4-Axis CNC Machining?

4-axis machining is a type of CNC (computer numerical control) machining that uses four axes of motion to create parts and products. The X, Y, and Z axes are the three linear or conventional axes found on most CNC machines, while the fourth axis (the A-axis) is an angular or rotary axis.

This fourth axis allows for more complex machining operations, such as contouring and sculpting. As a result, 4-Axis machining is often used for creating automotive parts, medical implants, and other precision components.

While 4-Axis machining offers many benefits, it also requires a higher level of experience and skill from the operator. As such, it is not suitable for all applications.

4 Axis machining

What Is 5-Axis CNC Machining?

5-axis machining is a type of computer-controlled manufacturing process that uses multi-axis machine tools to produce parts with complex shapes. The “5” in the 5-axis refers to the number of axes of motion that the machine tool can perform simultaneously.

In addition to the three linear axes (X, Y, and Z), 5-axis machining also includes two rotational axes (A and B). This allows for more flexibility in the positioning of the cutting tool, which results in more complex geometries that can be machined in a single setup.

While traditional CNC machining typically requires multiple setups to machine certain features, 5-axis machining can often be done in a single setup, which reduces production time and costs.

As such, 5-axis CNC machining has become increasingly popular in recent years, particularly for the production of aerospace components and medical implants.

5 Axis machining

4 Axis VS 5 Axis Machining: 5 Key Differences

Here are some differences between 4-axis machining and 5-axis machining:

A number of axes

The main difference between 4-axis machining and 5-axis machining is the number of axes that are used to control the movement of the cutting tool.

In 4-axis machining, the tool can move along three axes (X, Y, Z) and rotate around one axis (A or B).

In contrast, 5-axis machining allows the tool to move along all three linear axes (X, Y, Z) and rotate around two additional axes (A and B).


With 5-axis milling, the cutting tool has greater flexibility to reach difficult-to-access areas of the part being machined. It can approach the part from multiple angles and orientations, which reduces the need for repositioning the part during the machining process. This results in faster production times and improved accuracy.


5 axis machining is more suitable for the production of complex parts with intricate geometries. The additional axes allow the tool to follow complex curves and contours without the need for multiple setups or repositioning of the part. In contrast, 4-axis machining may require more setups and tool changes to achieve the same level of complexity.


5-axis milling machines are generally more expensive than 4-axis machines due to the additional hardware and software required to control the extra axes. However, the increased efficiency and flexibility offered by 5-axis machining may result in cost savings in the long run.

Machining time

5-axis machining can reduce machining time for certain parts as it allows for simultaneous cutting on multiple faces and angles of the part. This can significantly reduce the time required to produce a part compared to 4-axis machining.

In summary, 5-axis machining offers greater flexibility, improved accuracy, faster production times, and the ability to produce more complex geometries. However, it comes at a higher cost compared to 4-axis machining, which may be more suitable for simpler parts.

Applications Of 4-Axis And 5-Axis CNC Milling

Applications Of 4-Axis

4-axis CNC machining is a powerful technology that offers many advantages over traditional machining methods. Its ability to produce complex parts with precise dimensional control makes it ideal for a wide range of applications.

4-axis CNC machining is commonly used in a wide range of applications, including:

1. Aerospace: 4-axis machines produce complex parts for aircraft engines and other aerospace components.

2. Automotive: They machine engine blocks, crankshafts, and other automotive parts that require precise and complex geometries.

3. Medical: 4-axis machining creates custom medical devices, implants, and prosthetics that require high levels of precision and accuracy.

4. Mold making: It is used in the production of injection molds, which require highly accurate and complex shapes.

5. Prototyping: 4-axis machines are ideal for creating prototypes of various products due to their accuracy and speed.

4-axis CNC machining can be used in virtually any industry where there is a need for precise, high-quality parts. Its versatility makes it an essential tool for manufacturers of all types, from small businesses to large corporations.

CNC machined parts

Applications Of 5 Axis Machining

5-axis CNC machines are suitable for a variety of industries and can be used to create a wide variety of products. Some of the most common applications for 5-axis CNC machining include:

1. Aerospace Components:

The aerospace industry relies heavily on 5-axis CNC machining to create aircraft components. This includes everything from engine parts to fuselage panels.

2. Medical Devices:

Many medical devices are produced using 5-axis CNC machines. This includes implants, prosthetics, and surgical instruments.

3. Automotive Components:

The automotive industry uses 5-axis CNC machining to create a variety of components. This can include anything from engine parts to body panels.

4. Recreation Products:

Many recreation products are created using 5-axis CNC machining. This includes snowboards, wakeboards, and surfboards.

5. Artwork:

Some artists use 5-axis CNC machines to create unique pieces of artwork. This can include sculptures, reliefs, and engravings.

5 Axis machined parts

How To Choose Between 4-Axis And 5-Axis Machining

Here are some factors to consider when choosing between 4-axis and 5-axis CNC machining:

Part Complexity

If your parts have intricate geometries that require multiple setups and tool changes, 5-axis machining may be the better choice. It can reduce production time and increase accuracy compared to 4-axis machining.

Production Volume

If you need to produce large quantities of simple parts, 4-axis machining may be more suitable as it is generally faster than 5-axis machining.


5-axis machines are generally more expensive than 4-axis machines due to the additional hardware and software required. Consider your budget and the long-term cost savings before making a decision.

Material Type

If you are working with harder materials like titanium or stainless steel, 5-axis machining may be the better choice as it allows for more precise cuts and reduces the risk of tool wear.

Surface Finish

If you require a high-quality surface finish on your parts, 5-axis machining can help achieve this by allowing for more precise cuts from different angles.

Time Constraints

If you have a tight deadline, 4-axis machining may be the better choice as it is generally faster than 5-axis machining. However, if precision is important, 5-axis machining may still be necessary.

Operator Experience

5-axis machines require more skill and experience to operate effectively. If you do not have experienced operators, 4-axis machining may be the safer choice.

In conclusion, choosing between 4-axis and 5-axis CNC machining depends on various factors such as part complexity, production volume, material type, surface finish, time constraints, and operator experience. By considering these factors, you can make an informed decision that best meets your needs and requirements.


It can be hard to decide which type of CNC machining is best for your needs. Hopefully, this article has helped you understand 4 axis vs 5 axis machining and how to choose the right one for your business. If you have any questions or need help getting started, our team would be happy to assist you. You can click the below link to contact us.


What is 3-Axis CNC Machining?

3-Axis milling is a method of computer-aided manufacturing (CAM) used to produce three-dimensional objects. The process involves the use of computer-controlled cutting tools to remove material from a workpiece, resulting in an accurate and precise final product.

Unlike traditional machining methods, 3-Axis CNC machining can produce objects with complex geometries and intricate details.

In addition, the process is relatively fast and efficient, making it ideal for high-volume production runs.

Whether you’re looking to create a one-of-a-kind prototype or a large batch of parts, 3-Axis CNC machining is an excellent option for your manufacturing needs.

What’s the difference between 3-axis and 4-axis CNC milling?

3-axis CNC milling is the most common type of milling where the cutting tool moves along the X, Y, and Z axes to create a three-dimensional shape. This process is great for creating simple parts but can be limited when it comes to complex geometries. 

On the other hand, 4-axis milling adds another rotation axis around the X or Y axis, allowing the cutting tool to approach the workpiece from multiple angles. This additional axis enables more intricate designs with greater precision and accuracy.

Overall, 4-axis milling offers greater flexibility and versatility than the 3-axis machine, making it ideal for more complex machining projects.

latest articles