E77+N75 Power, High Precision Milling Head

The Gong Yang E77+N75 Join Power, High Precision Milling Head is engineered to expand heavy-duty, multi-directional cutting capabilities on large vertical machining centers and double-column plano-millers, seamlessly adapting equipment to execute both vertical and cross-milling (horizontal milling) operations to achieve versatile, multi-purpose machine utility. Featuring an exceptionally rigid yet compact design, the unit is optimized for deep-pocket boring, heavy end-face milling, interior cavity profiling, and bevel chamfering across complex workpieces, substantially minimizing cumulative tolerances caused by multiple workpiece setups.

Built for dependable cutting rigidity, high torsional resistance, and prolonged operational life, the spindle shaft and drive components are precision-machined from high-grade chromium-molybdenum alloy steel, rigorously carburized, quenched, and precision ground to preserve geometric accuracy under heavy cutting loads. Delivering up to 38 KW of drive power and 1000 N.m of cutting torque with a 1:1 drive ratio, the E77+N75 operates at speeds up to 1000 RPM across standard #50 spindle tapers and cutter diameters up to ψ150 mm. The spindle accommodates NT or BT tool holders (BT pull studs must be removed, and dedicated matching drawbars can be specified upon order). Spindle rotation is designed strictly for clockwise (forward) cutting duty—reverse rotation is dedicated exclusively to tapping and counterboring cycles and must never be applied to milling or drilling—ensuring long-term geometric precision and operational reliability.