Understanding 5‑Axis CNC Machine Tool Structures: 3 Main Types Explained
Three Core Classifications of 5‑Axis Machine Tools (Industry‑Standard & Practical Guide)
1. Classification by Structural Form (The most common classification, essential for equipment purchasing)
A 5‑axis machine consists of 3 linear axes (X/Y/Z) plus 2 rotary axes. Based on the mounting positions of the two rotary axes, they fall into three categories:
1. Tilting‑rotary table / Trunnion‑type (A+C axis)
- Structure: Double‑rotating worktable; the spindle remains stationary
- Features: Excellent rigidity, high precision, good machine‑enclosure protection; limited workpiece size and load‑bearing capacity
- Applications: Small‑size precision molds, impellers, small hardware components, high‑precision curved‑surface machining
- Representative equipment: Vertical trunnion 5‑axis machining center
2. Hybrid Head‑and‑Table Type (B+C axis, popular mainstream model on the market)
- Structure: Swiveling B‑axis spindle head + rotating C‑axis worktable
- Features: Best overall versatility, large machining envelope, balanced cost‑performance
- Applications: Auto‑parts, aerospace structural components, complex mechanical parts, mass‑production jobs. It is the highest‑volume standard industrial 5‑axis solution sold globally.
3. Dual‑swivel‑head Type (A/B dual tilting spindle head)
- Structure: Two rotary axes integrated at the spindle end; worktable is fixed and only moves along X/Y/Z linear travels
- Features: Workpiece stays stationary during machining; capable of extra‑large and extra‑long workpiece processing
