The spindle, which is available on a four-axis HMC 1250/1600 machine, is suitable for for aerospace, energy and heavy equipment manufacturing. The T-Rex is engineered with 130 mm (5.1 in) ID bearings to handle the 42.3 kN (9,500 lb) cutting thrust capability of the HMC 1250/1600 series horizontal machining centres. The spindle is configured with 80 kW (107.3 hp) driving power and two speed ranges up to 5,000 rpm. The T-Rex spindle recently demonstrated triple the metal removal rates over previous spindle designs for an aerospace customer machining Carpenter 465 hardened to 50-52 Rc. The demonstration utilized a 75 mm (3 in) diameter Harvi inserted endmill with five flutes and 13 inserts per flute. The cutting parameters were 100 mm (4 in) axial depth of cut, 24 mm (0.95 in) radial depth of cut, and 0.5 mm/rev (0.020 ipr) feedrate. "This cut produced an excellent surface finish with no sign of chatter and virtually no vibration, using only one-third of the available spindle power," said Pete Beyer, Mag's director of product development. "The power of this spindle is so great that it easily handled the full Y-axis thrust of the demonstration machine, which can be equipped with higher torque axis motors to produce even higher metal removal rates. This power, coupled with the stiffness and vibration damping of the machine chassis, puts the HMC 1250/1600 in a class by itself for large hard-metal parts."
