What is the difference between 3+2 and simultaneous 5-axis?

In 3+2 the table indexes to an angle and locks while cutting continues in 3 axes; in simultaneous mode all five axes move together. 3+2 suits prismatic parts, free-form surfaces need simultaneous. We run both.

What is the largest part size?

Table Ø500 mm, travel 762 × 508 × 508 mm. Because tool–part interaction during rotation depends on geometry, the limit is assessed per part.

Service / 5-axis CNC machining

5-Axis Machining Centre

Simultaneous 5-axis CNC machining on a Haas UMC trunnion-table machining centre. Complex surfaces, compound-angle holes and multi-face parts in one setup — fewer setups mean less stack-up error and shorter lead times.

01Why 5-axis matters

Machining five faces on a 3-axis machine takes at least three setups, and every setup shifts the datum. On a 5-axis machining centre the table tilts on B and rotates on C, the part is clamped once and every face is cut against the same datum.

In simultaneous mode the cutter stays tangent to the surface as it moves; shorter tools reduce vibration, surface finish improves, and free-form geometries such as aerofoil profiles and conical blends are finished in one pass.

02Machine capacity*

Model: Haas UMC-750SS (Super Speed)
Kinematics: 5-axis simultaneous, trunnion table
Travel X / Y / Z: 762 × 508 × 508 mm
B-axis tilt: +120° / −35°
C-axis rotation: 360°
Table diameter / max load: Ø500 mm · 300 kg
Spindle speed: 15,000 rpm
Positioning: ±0.003 mm
Tool changer: 40+1 side-mount
Through-spindle coolant: 1000 psi

03Suitable part types

Avionics chassis and enclosures — thin walls, multi-face pockets and hole patterns
Structural brackets and fittings — compound-angle holes and faces
Fins, nozzles and aerodynamic surfaces — free-form machining
Mechanism parts, shafts and bushings — tight GD&T across multiple datums
Fixtures and gauges — single-setup datum integrity

04Programming and verification

Toolpaths are simulated in CAM; collision and rest-material checks happen before the machine. The first part is measured on the CMM, the toolpath is corrected if needed, and production runs on the approved program.

Frequently asked questions

What is the difference between 3+2 and simultaneous 5-axis?: In 3+2 the table indexes to an angle and locks while cutting continues in 3 axes; in simultaneous mode all five axes move together. 3+2 suits prismatic parts, free-form surfaces need simultaneous. We run both.
What is the largest part size?: Table Ø500 mm, travel 762 × 508 × 508 mm. Because tool–part interaction during rotation depends on geometry, the limit is assessed per part.

* marked values are pending verification before publication (see VERIFY.md).