Makino's a81nx horizontal machining center increases the size of the work zone from other NX series machines to accommodate large parts requiring diverse tool types and sizes. The X-, Y- and Z-axis travels measure 35.4" × 35.4" × 40.2" (900 × 900 × 1,020 mm). The B-axis table is available in two configurations, as an index table with a large curvic coupling diameter or as an NC rotary table with a three-roller-type bearing. Both configurations are designed for optimal stability and thrust support. The HMC’s 10,000-rpm spindle offers 305 Nm of duty-rated torque and 45 kW of extended-duty power (26 kW of continuous output). An optional 8,000-rpm, high-torque spindle configuration is available for hard metal applications.
The rigid bed, column and table castings feature an increased step height between the front and rear X-axis linear guide for greater strength and improved acceleration. Roller-type linear motion guides provide increased stiffness under high load capacities. The machining center also features a GI servo control mode that can reduce pocketing times for aluminum billet applications, as well as a chain-type tool-change magazine with 80-tool capacity. The automatic toolchanger is designed to accommodate long, heavy tooling with large diameters, and features a touch-type HMI for managing tool data.
An L-shaped door eases accessibility to the spindle and provides visibility for tool inspection. The machine’s automatic pallet changer also features a safety guard door that can be adjusted to match the height of the operator’s work platform. A wider APC stocker improves loading of large fixtures and workpieces and simplifies chip cleaning. Preventive maintenance features are concentrated on the machine’s back panels.