Differences Between Simultaneous 5-Axis and Positional 5-Axis Machining
The difference between simultaneous 5-axis and positional 5-axis machining lies in whether all five axes move at the same time during the machining process. In simultaneous 5-axis machining, the five axes adjust continuously and synchronously as the cutting tool moves, allowing complex curved surfaces to be formed in a single pass. In positional 5-axis (3+2 axis) machining, the workpiece is rotated to a fixed angle and locked, then cut using three-axis methods, requiring repositioning for each face. The costs, suitable parts, and quotation evaluation methods for the two are completely different.
What Is Simultaneous 5-Axis Machining
Simultaneous 5-axis machining refers to the X, Y, and Z linear axes plus two rotary axes moving continuously and simultaneously at the exact moment of cutting. Because the tool vector can correspond to the workpiece surface at any time, it is most suitable for geometries such as blades, impellers, bone plates, and complex flow channels that require single-pass forming. Additionally, since the tool attitude can maintain the optimal cutting angle, machining time can be shortened and surface quality improved. However, it places higher demands on CAM programming, machine accuracy, and operator skills, and the unit machining cost is usually higher.
Key Practical Differences Between the Two 5-Axis Types
Tool and Workpiece Motion
In simultaneous 5-axis, all five axes move during cutting; in positional 5-axis, the workpiece is rotated and locked, then cut using three-axis methods.
Suitable Part Geometry
Simultaneous 5-axis is suitable for continuous curved surfaces and complex parts requiring single-pass forming; positional 5-axis is suitable for multi-face machining, hole patterns, and angled surfaces.
CAM and Programming Complexity
Simultaneous 5-axis requires higher-level CAM and interference simulation; positional 5-axis programming is closer to three-axis, with shorter preparation time.
Impact on Quotation and Lead Time
Simultaneous 5-axis has higher machining time and programming costs, so quotations are usually higher than positional 5-axis, subject to confirmation based on actual specifications.
How Buyers Should Evaluate When Requesting a Quote
When providing 3D files (STEP or IGES), you can first note which surfaces must be formed in a single pass and which surfaces allow multi-step machining. This helps the machining shop determine whether simultaneous 5-axis is truly necessary. If the part only has multi-angle holes or angled surfaces, positional 5-axis is often sufficient and more cost-effective. Yuan Shun Li is equipped with BROTHER, MAZAK, and other machines as well as Star Swiss-type lathes, and can recommend the appropriate machining method based on part geometry, with quotations and lead times confirmed according to actual specifications.
Need Help Evaluating Which 5-Axis Type Is Right for Your Part?
Feel free to provide your 3D file and machining requirements, and let Yuan Shun Li recommend the appropriate 5-axis machining method based on part geometry and provide a quotation.