Extended Horizontal Machining Capabilities

The a51nx and a61nx horizontal machining centers offer larger work envelopes and next-generation productivity, accuracy and reliability.

The a51nx and a61nx horizontal machining centers from Makino (Mason, OH) extend the capabilities of the highly successful a-series with a host of technologies for next-generation productivity, accuracy and reliability. Designed with larger work envelopes, improved casting designs and spindle and axis guide enhancements, the nx machines offer rigidity, speed and precision far beyond that of typical 40-taper machines.

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Both models boast expanded axis travels to accommodate larger parts or more parts per fixture. The a51nx features a 560 mm (22.0 in) X-axis and extended Y- and Z-axes of 640 mm (25.2 in) for an industry-leading total axis volume of 8.1 cu ft. Its additional Y stroke yields a 14 percent larger working envelope.

The standard a61nx features a 730 mm (28.7 in) X-axis, 650 mm (25.6 in) Y-axis and extended Z-axis of 800 mm (31.5 in). An optional tall column on the a61nx expands the Y-axis to 730 mm (28.7 in), making it beneficial for large die-cast or near-net-shape applications. Thanks to the expanded Z-axis stroke, maximum tool length on the a51nx and a61nx models is increased to 430 mm (16.9 in) and 510 mm (20.1 in), respectively.

INCREASED SPINDLE POWER
The a51nx and a61nx machines offer new, more powerful standard and optional spindles. The standard spindle is a 14,000 rpm design with 240 Nm of duty-rated torque and 22 kW of continuous output, a 19 percent increase over the previous model.

An optional 300-Nm spindle designed for high metal-removal rates in ferrous applications is also available. Along with the two new spindles, the current 20,000 rpm core-cooled spindle remains available as an option on the a51nx and a61nx machines.

HIGHER MACHINE STRENGTH AND RIGIDITY
Casting design and axis guide improvements of the nx machines deliver higher stiffness, load capacities and precision. A new crossed roller guide design yields improved rigidity for higher metal-removal rates, reduced vibration and improved tool life.

Several major casting enhancements coupled with the use of cross roller guides enable customers to effectively use the additional 14 percent Y-stroke.