Four-Axis CNC Router for 3D Carving on Sale

In the big family of CNC router, four-axis CNC router occupy an important position. They are mainly used to process some 3D products. At the same time, they also have the processing capabilities of three-axis CNC router, which are suitable for users with a variety of product types to choose to use. Our four-axis CNC router are divided into two types: four-axis-linkage with rotating axis and four-axis-linkage with spindle axis swing. Users can choose the appropriate style and model according to their actual use.

Next, we will introduce the structure, working principle, application and other aspects of this type of machine in detail to help you understand the details of the latest four-axis-linkage 3D CNC router in 2026.

What Is a Four-Axis CNC Router?

Generally speaking, a four-axis and four-link CNC router uses four drive motors to drive the engraving spindle or workpiece to move or rotate to complete a three-dimensional workpiece, and these axes can move simultaneously. Please note that only when the four axes can move simultaneously can a more complex workpiece be completed. It is not enough to just equip it with four motors. This also requires the CNC system to have the corresponding functions.

At present, there are two common forms of this CNC router. One is based on the ordinary XYZ three-axis machine, with an additional rotating axis (A axis) that can dynamically control the speed. The rotating axis can work in conjunction with the spindle. Its structure is very similar to that of a four-axis linkage lathe. The device that drives the workpiece to rotate can also be divided into two types: center and chuck. It is used to fix long strip workpieces with circular or square cross-sections or special-shaped workpieces that are pasted together. One end is driven by a drive motor to drive a reducer or gear to indexing rotate, and then the engraving head engraves the workpiece. This structure is suitable for processing the convoluted surface of columnar products such as table and chair legs, figures, and sculptures. Another type is improved from the common three-axis CNC router. On the basis of the up and down movement of the main axis (Z axis), a device that can perform 180-degree circular indexing rotation is added. The rotation plane of this device is on the xz-plane and is driven by a servo motor to complete the processing of the vertical surface, inclined surface or curved surface of the workpiece. From the front view, the main axis of this CNC router swings left and right with the tail as the fulcrum, so we also call it a "swing head CNC router". This type of CNC router is often used in models, molds, corrugated plates, three-dimensional reliefs with curved surfaces and other processes.

Although the mechanical structures of these two types of CNC routers differ, both can access the surface of the material from multiple angles to complete the processing work. Many complex processes that cannot be accomplished by the movement of linear axis of an ordinary 3-axis CNC router can be well-completed by them. As for how to make a specific choice, it still depends on the products that actually need to be processed.

How The Four-Axis CNC Router Works?

The working principle of the four-axis CNC router is to add a rotating axis to the three-axis CNC router, so that the tool or workpiece can rotate around the rotating axis, ensuring that the tool can contact the processing surface at a certain angle, thereby realizing complex processing operations on three-dimensional, curved and vertical surfaces. This type of machine usually has three linear motion axes, X-axis, Y-axis and Z-axis, and a rotating axis (A-axis or C-axis). The X-axis, Y-axis and Z-axis are orthogonal, and the tool moves in the Z-axis direction, so that it can process the surface of the workpiece parallel to the X-axis and Y-axis, while the rotating axis controls the spindle or workpiece to rotate at a certain degree. This design enables the CNC router to perform complex processes such as multi-faceted processing, curved surface processing, bevel processing, and rotation processing on the workpiece.

The four-axis CNC router can make the tool fit the material surface more closely for engraving, so that it can process more complex and finer patterns and shapes than the three-axis CNC router, greatly improving the richness, processing effect and precision of the processable products. At the same time, this type of machine can also increase the engraving head multi-station batch processing, further improving production efficiency.

Application Scope

It can be used to 2.5D relief and 3D carving of various non-metallic materials, and to process various complex curve patterns, curved arcs, bevels, vertical surfaces, bent feet, etc.

The materials that can be processed are: solid wood, engineered wood, composite wood, plastic, glass, POM (polyoxymethylene), PTFE (polytetrafluoroethylene), nylon, PVC, PU (polyurethane), ABS plastic, rubber amine, phenolic plastic, acrylic, rubber amine and phenolic plastic (bakelite), carbon fiber, fiberglass, wood substitute, foam, PMI material, plaster and other non-metallic materials.

Application industries:

• Furniture industry: European table and chair legs, corrugated boards, curved arc boards, retro furniture, wooden doors, screens, stair railings, Roman columns, sofa legs, etc.

• Woodworking industry: portraits, sculptures, Buddha statues, decorative ornaments, vases, wooden toys, axe handles, hammer handles, etc.

• Mold industry: yacht molds, car molds, aviation models, foam molds, plaster molds and other non-metallic material models.

• Musical instrument industry: guitar, piano, violin, cello, zither and other musical instrument accessories.

Specifications

Advantages of Four-Axis CNC Router

The four-axis router has the characteristics of strong processing capability, high degree of precision of processed products and wide range of applications, especially it has significant advantages in complex curved surface processing.

• The four-axis CNC router uses computer program control to realize four-axis intelligent linkage work. Compared with traditional manual engraving or three-axis CNC routers, the four-axis CNC router only needs to load the workpiece once during the entire processing process, and there is no need to perform secondary positioning and flip adjustment on the workpiece. When dealing with complex engraving tasks, it can greatly improve processing efficiency and reduce labor costs.

• Because the four-axis CNC router has four axial directions, the tool or workpiece can rotate at an angle, so during the processing process, the tool can fit the material surface as closely as possible for engraving, milling, etc. The finished product is more delicate and accurate than the ordinary three-axis CNC router. It can complete the processing of multiple surfaces of the workpiece in one clamping, reducing the error caused by repeated clamping of the workpiece. The processing accuracy is extremely high, and basically no manual secondary processing is required.

• It is suitable for processing various complex parts, especially in extreme processing with tricky depths and angles. The four-axis linkage control makes it more flexible when processing complex surfaces, meeting the processing needs of different angles, depths and complex geometric shapes. Whether it is common fan blades, corrugated plates or complex 3D mold products, the four-axis CNC router can do it and meet the diverse requirements of customers.

Why Should You Choose CATEKCNC's Four-Axis CNC Router?

As the source production factory, we strive for excellence in every step of equipment production and strictly follow the best solution.

In the manufacture of the machine bed, we use thick-walled square tubes, whose thickness far exceeds the industry standard, and perform standard annealing treatment to ensure that the overall structure is strong and stable. Key parts such as the frame guide groove are milled by the Heidemann gantry milling machine imported from Germany, and are precisely processed to lay a good foundation for subsequent machine assembly. We have our own professional paint spraying room and plastic spraying room, the machine is sprayed at least once with antirust paint, once with primer and once with top coat to ensure that the machine has excellent corrosion resistance no matter what temperature and humidity environment. In the selection of parts suppliers, we only cooperate with well-known Chinese or international brands to ensure the quality of machine accessories from the source.

In the final assembly stage, the assembly of each machine is led by fitters and electrician experts with more than 20 years of experience, and the assembly accuracy and quality are strictly controlled. Our quality inspection department is the most stringent in the industry, using professional testing instruments to inspect the machine with requirements 50% higher than the industry standard.

In terms of after-sales service, we provide each machines with an super-long three-year free warranty, and also promise lifelong maintenance and free software upgrades, and are committed to bringing you unparalleled usage and after-sales experience.

How to Buy a Machine from Abroad?

When you consider buying a machine that is not produced in your country or region online, you may find the procedures complicated. In fact, it is not. The following presents the standard purchase process for you:

1. Select and compare suppliers

   If you plan to purchase a four-axis 3D CNC router to realize your personal hobbies, creativity or business plans, you must first select a professional supplier for consultation, and then deeply understand whether the machines produced or sold by the company meet your needs. You can communicate with the supplier through email, phone, WhatsApp and other channels.

2. Test machine proofing

   You can ask the supplier to shoot machine processing videos and multi-angle photos of the finished product according to your processing needs or specific products, so as to further confirm the performance of the equipment and whether the machine has the processing capabilities you need.

3. Negotiate the price

   After confirming that the machine's parameter configuration and processing capabilities meet your expectations, you can ask the supplier for the machine price and transportation costs to clarify whether it is within the budget.

4. Order the machine

After everything meets expectations, the supplier will usually send you an invoice (such as PI), and you can pay the deposit based on the remittance information on it.

5. Schedule production

   After the factory receives your advance payment, it will start equipment production. Standard models are generally available in stock, while the production cycle of non-standard customized models is about 10-90 days.

6. Confirmation and inspection

   After the machine is produced, we will send you photos, videos and other information of the equipment so that you can confirm whether the details and configuration of the machine meet the requirements.

7. Transportation and customs clearance

   The entire transportation and customs clearance process will be assisted by a professional third-party company. The price of sea transportation is relatively affordable, while the prices of air and land transportation are relatively high. We will select the best transportation plan for you to choose.

8. Receipt and use

   After receiving the equipment, our professional after-sales engineer will take the initiative to contact you and provide you with full-process teaching and training from machine installation to operation and use, and help you put the machine into production and use throughout the process.

What Function Kits Can be Added to a Four-Axis CNC Router?

Even though the functions of the standard four-axis CNC router are already very powerful, you can still improve the convenience of the machine by selecting more functional kits, and meeting more personalized processing needs.

Automatic tool change function

The machine is equipped with an ordinary engraving spindle that requires manual clamping of the tool. If the processing of product requires a combination of multiple tools, you should choose an automatic tool change spindle. This tail end of the spindle adopts a pneumatic cylinder structure. When working, the cylinder pushes the ejector pin to hit the center drawbar, causing the chuck to extend outward and the tool holder to fall off. Subsequently, the spindle automatically grabs the tool from the straight or disc tool magazine. When the tool is in place, the cylinder inside the spindle releases the air pressure and cuts off the air source, and the chuck clamps the tool holder, thereby completing the automatic tool change process.

Multi-head or multi-station

When facing large production needs, and the cost of purchasing multiple equipment is too high or the site space is limited, choosing to increase the number of spindles and rotary axes is an efficient solution. In this way, the machine can have multiple processing stations, can process multiple identical products at the same time, and significantly improve production efficiency.

Tool cooling system

When processing plastic or soft metal materials, the heat generated by the high-speed rotation of the spindle may cause the surface of the material to melt, which not only affects the processing quality but also shortens the service life of the tool. To solve this problem, a circulating cooling device can be added. The device sprays coolant on the tool through a nozzle to achieve efficient cooling. In addition, the machine table is also equipped with a stainless steel sink that can effectively catch and collect the coolant to prevent the coolant from polluting the working environment or corroding the machine parts.