5-Axis CNC Machining

5-axis CNC machining expands conventional 3-axis movement by adding two rotational axes. Depending on machine configuration, these movements may be provided through a rotating table, tilting spindle, or combined kinematic arrangement.

The technology supports both indexed 3+2 machining and simultaneous 5-axis machining. Indexed machining repositions the workpiece or tool between cutting operations, while simultaneous machining coordinates multiple axes during cutting.

Typical applications include:

• Aerospace structural components and precision brackets.
• Impellers, blisks, and complex curved surfaces.
• Medical and orthopedic components.
• Mold cavities and precision tooling.
• Components with compound angles or difficult-to-access features.

Materials commonly processed include aluminum, stainless steel, titanium, alloy steel, brass, and selected engineering plastics.

5-axis machining can reduce the number of setups, improve access to complex features, and minimize repositioning-related errors. However, it is not automatically more economical than 3-axis machining for simple geometries.

Achievable tolerances depend on part size, geometry, machine kinematics, workholding, thermal stability, and measurement strategy. Selected precision features may require tolerances of ±0.01 mm or tighter, but capability must be verified for each project.

Surface quality is influenced by tool orientation, cutting strategy, material behavior, and finishing requirements. Complex freeform surfaces may require additional polishing or controlled finishing operations.

A complete 5-axis machining RFQ should include a STEP or equivalent 3D CAD model, dimensioned drawing, material specification, critical tolerances, surface finish requirements, production quantity, and any restricted tool-access or datum requirements.

Inspection may involve coordinate measuring machines, optical scanning, first article inspection, and verification of geometric dimensioning and tolerancing requirements.

Metraxio enables buyers to submit complex machining projects with structured technical documentation and defined quality expectations.

5-axis work is commonly cut in aluminum, stainless steel, titanium, alloy steel and some engineering plastics. Tool reach and workholding change with the alloy. Name the grade and any condition, such as a heat-treated blank, because that affects both the strategy and the order of operations.

Indexed 3+2 machining repositions the part between cuts. Simultaneous 5-axis machining moves the rotary axes while cutting, which is what sculpted surfaces and some impeller-type geometry need. Deep features still need a tool that fits, and thin walls can move. A 5-axis machine is not automatically the economical route for a plate with holes on one face.

Provide a STEP or STP model, a drawing that identifies datums and the surfaces that must be finished in one clamping, the material grade, the quantity and the surface finish. Note any regions the tool must not touch. Inspection of freeform surfaces should be described, for example which profiles a CMM or scan must check.