Citizen Miyano ABX-80THY

The Citizen Miyano ABX-80THY is the largest and most capable machine in Citizen's Miyano fixed-headstock lineup, combining an 80mm bar capacity with a triple-turret configuration and Y-axis capability. This machine represents the absolute pinnacle of what a fixed-headstock CNC lathe can deliver—three simultaneous cutting operations, 36 live tool positions, and the large bore needed for substantial industrial components.

The triple-turret design enables three concurrent machining operations, pushing cycle time reduction to levels that even the most capable twin-turret machines cannot match. At the 80mm bar size, the components being machined are typically high-value—automotive driveline assemblies, oil and gas valve bodies, heavy hydraulic manifolds, and large aerospace fittings—where the cost of each part justifies the extreme machine investment required.

The main spindle reaches 3,500 RPM with a powerful 18.5 kW motor, delivering the torque needed for heavy cuts at the full 80mm bar diameter. The sub-spindle matches with appropriate power for back-end operations. All three turrets carry live tooling at up to 6,000 RPM, providing extensive milling and drilling capability across 36 total tool positions—enough to handle the most complex multi-feature parts without any tooling compromise.

Citizen's thermal management technology faces its greatest challenge on the ABX-80THY, where three turrets cutting simultaneously at the 80mm bar size generate extreme heat loads. The thermally symmetric design, strategic coolant placement, and robust machine structure maintain dimensional accuracy under these conditions—a feat of engineering that separates the Miyano platform from machines that simply add turrets without addressing the thermal consequences.

The ABX-80THY is an engineering statement as much as a production machine. It's designed for manufacturers who have exhausted every other avenue for cycle time reduction and need the ultimate simultaneous processing capability at the 80mm bar size. The machine demands the highest level of programming expertise, operator skill, and production volume to justify its investment—but for the right applications, it delivers per-part productivity that no other fixed-headstock machine can match.