A73/A74 Series Deep Boring Right Angle Milling Head

The Gong Yang A73 and A74 Series Deep Boring Right Angle Milling Heads are engineered to extend the axial reach and deep-cavity machining capabilities of machine tools, seamlessly adapting equipment to execute both vertical and cross-milling operations. Fitted with precision-ground spiral bevel gears, the transmission delivers smooth power transfer, minimal backlash, and superior wear resistance. Featuring a compact footprint and ergonomic setup, operators can loosen the locking T-bolts and utilize the integrated 360° graduated index ring to swiftly position the cutter orientation, making it an ideal attachment for planers, plano-millers, and complex machine tools performing deep-cavity boring, top-face milling, and bevel chamfering.

Built for dependable cutting rigidity and extended operational life under demanding loads, both the spindle shaft and drive gearing are precision-machined from high-grade chromium-molybdenum alloy steel, rigorously quenched, hardened, and precision ground. Heavy-duty tapered roller bearings provide outstanding radial and axial load capacity optimized for low-speed, high-torque cutting cycles. Delivering 38 KW of drive power and output torque ratings from 1000 to 1200 N.m at operating speeds up to 800 RPM, the series is available in two configurations: the A73 (#40 spindle taper, max tool diameter ψ150 mm) and the A74 (#50 spindle taper, max tool diameter ψ200 mm). Operating strictly with clockwise (forward) spindle rotation, the series maintains uncompromising geometric accuracy and long-term mechanical reliability during heavy deep-boring applications.