Mazak QT-Ez 12M

The Mazak QT-Ez 12M is a 12 in chuck turning center built around power more than speed: the spindle motor is listed at 22 kW (30 HP) (30 min. rating) and the top speed is 3,300 rpm. The turret holds 12 tools, and the turning envelope is Ø14 in (356 mm) by 19 in (483 mm).

A 3,300 rpm ceiling is a real constraint on small diameters, where reaching a sensible surface speed for carbide needs far more rpm than it does on a large flange. On the big chucked parts a 12 in chuck implies, the limit is rarely reached. The practical reading is that this is a machine for larger-diameter work, and that small bar parts are better placed on the QT-Ez 10M, which runs to 4,200 rpm with a 15 kW (20 HP) (30 min. rating) motor.

Bar capacity is Ø3 in (76 mm). X travel is 9 in (229 mm) and Z travel 24 in (610 mm), with a swing of Ø27 in (686 mm). The 19 in (483 mm) turning length is the figure to check against shaft-type parts, since the plain QT-Ez 12 turns 21 in (533 mm) and Ø16 in (406 mm) and runs to 4,000 rpm on the same motor rating.

Those differences from the QT-Ez 12 are all the table documents about the M version. No rotary-tool row, Y-axis row or second-spindle row is listed for this model, so the tooling side of the specification, including any rotary-tool speed and power, has to be obtained from Mazak.

The QT-Ez series page lists Mazak SUPERFLOW 1000 psi high-pressure coolant, a mist collector and a chip conveyor among the equipment for the range. None is marked as standard, so each should appear by name on the quotation.