MAKINO – a51nx-5XU Horizontal Machining 5-Axis

a51nx-5XU Horizontal Machining 5-Axis
a51nx-5XU: Bringing the proven performance of Makino’s nx products to 5-axis part production.
  • 10/10
    Spindle RPM - 10/10
  • 10/10
    ATC Capacity - 10/10
  • 9/10
    Speed - 9/10
  • 9/10
    Desing - 9/10


Manufacturers of medical, aerospace, prototype and complex multi-face parts have long understood the advantages of 5-axis machining. Five-axis machining capability can improve productivity and quality simply by consolidating operations.

Technical Specifications

As Makino’s industry-leading a51nx, the linear X-, Y- and Z-axes of it, are assembled from the same-tiered column, bed and rigid casting structure. Axis motions like rotary B- and C-axis derive from a pair of responsive (75 / 150 rpm) direct-drive motors. Both motors are located in an essential cast structure. This gets rid of the setback errors and failure of hardness, which is inevitable with table-on-table 5-axis designs. The molded table casting allows the accessibility of optimal rotational centerline to the work. The C-axis cables are stationed through the splashguard ceiling. This enables us to make sure that the operation is accurate and secure (chip-free).

The characteristic of the a51nx-5XU that makes it unique when compared to other small 5-axis machining solutions is its horizontal orientation and combined work mechanization.  Horizontal orientation provides optimal chip shedding. By getting rid of rebutting of chips, particularly in aerospace and medical materials, it enhances tool life and the quality of surface finish. Loading parts in a 5-axis horizontal orientation might cause in some material-handling challenges. However, the a51nx-5XU, with its exclusive work-pallet magazine, also excludes these challenges.

Similar to Makino’s confirmed matrix tool magazine, each a51nx-5XU is constructed with a work-pallet magazine (WPM). The standard WPM22 stores 22 workpieces up to ᴓ300mm wide by 300mm tall. An alternative WPM58 can hold 58 smaller ᴓ200mm parts. Parts are installed directly in to 50-taper dual-contact tool holders (BBT50) and deposited in the WPM matrix. In just 4 seconds, the automatic work changer carries the ready work from the WPM to the elemental V-flange receiver of the machine’s C-axis. In order to ensure maximum spindle utilization, offline work-piece setup and loading through the standard work-setting station are enabled.

The 5-axis part production capabilities, combined within standard work-piece automation, allows the a51nx-5XU to be an optimal solution for production of rotating cutting tools, aerospace, medical and prototype components. The work-pallet magazine enables stable manufacture of both high diversity and low volume including traditional high-volume production components.

Pallet:BBT50 Tool holderX: 22.8″ Y: 25.2″ Z: 19.7″

  • B Axis:270° (-90° ~ +180°) Direct Drive
  • C Axis:360° Direct Drive
  • Spindle RPM:14,000 (20,000 opt)
  • Rapid Traverse:2,362 ipm
  • Cutting Feedrate:1,968 IPM
  • Maximum Workpiece Size:11.8″ ᴓ X 11.8″ (WPM22) / 7.87″ ᴓ X 11.8″ (WPM58)
  • Maximum Payload:66 lbs
  • ATC Capacity:313
  • Tool to Tool:0.9
  • Chip to Chip: 2.4
  • Maximum Tool Diameter: 6.7″

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