Citizen Miyano BNE-51

The Citizen Miyano BNE-51 is a multi-function fixed-headstock CNC lathe with live tooling and sub-spindle capability for complete part processing on components up to 51mm in diameter. Stepping up from the BNE-42, the larger bar capacity opens the door to a wider range of components while maintaining the precision and thermal stability that define the Miyano brand.

The BNE-51 delivers a main spindle speed of 5,000 RPM with a spindle motor rated at 11 kW, providing ample torque for aggressive material removal in steel and stainless steel at the 51mm bar size. The sub-spindle enables back-end operations including facing, boring, threading, and drilling, so parts come off the machine fully finished. Y-axis capability allows off-centerline milling features—flats, hexagons, keyways, and eccentric holes—to be machined without secondary operations.

The machine's thermally symmetric cast iron bed and box-way construction provide the rigidity and stability needed for consistent accuracy across temperature variations in the shop environment. Citizen's attention to thermal management is especially important at the 51mm bar size, where cutting forces and heat generation are significantly higher than at smaller diameters. The 12-station turret with live tooling accommodates the variety of tools needed for multi-operation cycles.

The BNE-51 sits in a productive middle ground between compact chucking lathes and large mill-turn centers. It handles the bread-and-butter work of many job shops and production facilities—automotive transmission components, hydraulic valve bodies, coupling nuts, and similar parts in the 25-51mm range that need both turning and secondary features. The Mitsubishi M80 control provides familiar programming with Citizen's proprietary cycle enhancements.

For shops looking to consolidate turning and milling into a single machine without the capital investment and floor space requirements of a full mill-turn center, the BNE-51 offers a practical and cost-effective solution backed by Citizen's decades of precision lathe experience.