4-axis milling involves the same processes involved in 3-axis machining, where a cutting tool is used to remove material from a piece to create the desired shape and profile. However, in the case of 4-axes machining, milling is performed on an additional axis. A 4-axis CNC machine operates on the X,Y and Z axes like a 3-axis machine, but it also includes rotation around the X-axis, which is called the A-axis. This is the 4th axis that’s added to our machining process. In most cases, the workpiece will be rotated to allow for cutting to occur around the B-axis.

 

4-axis milling is useful when holes and cut-outs need to be made in the side of a piece or around a cylinder. They can provide quick and efficient work based off computer numerical inputs for precise results.

 

4-axis CNC router has all the same axes of a 3-axis router plus the additional A-axis that rotates the spindle around the X-axis up to 180 degrees during the cutting process.

This rotational axis allows cuts to be executed on multiple sides of the workpiece without resetting, while a 3-axis router can only perform cuts to one side of the same piece at a time. 4-axis CNC routers are the preferred method for advanced, intricate cuts and carvings like those often seen in furniture, musical instruments, cabinetry, and more.

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