Mazak HQR-100MSY

The Mazak HQR-100MSY is the smallest machine in the HQR line of twin-spindle, twin-turret turning centers: a 6 in chuck on both spindles, 6,000 rpm at both ends, and an upper and a lower turret that each hold 12 tools. Mazak's model list gives its configuration as Milling, Second Spindle, Y-axis, and the table backs each of those with figures.

The two spindles are identical. Each is rated 7.5 kW (10 HP) continuous and 11 kW (15 HP) on the 30 min. rating, and the main spindle's maximum torque is 119.5 ft-lb (162 Nm) at 25% ED. That is modest power, and it fits the work: small-diameter parts where spindle speed matters more than torque. The HQR-150MSY keeps the same 6 in chucks on a machine of almost the same weight, 20,326 lb (9,220 kg), but has an 11 kW (15 HP) continuous main spindle that tops out at 5,000 rpm, so the choice between the two is speed against power.

The turrets do not have the same reach. The upper turret travels 7 in (178 mm) in X and 20 in (508 mm) in Z; the lower turret has 4 in (102 mm) of X and 23 in (584 mm) of Z. Both have a Y-axis of 4 in (102 mm), which is ±2 in (51 mm) about centre. Rapids follow the same pattern, 1,181 ipm (30 m/min) in X on the upper turret against 945 ipm (24 m/min) on the lower, with 1,575 ipm (40 m/min) in Z on both.

Rotary tools run to 6,000 rpm on a 2.2 kW (3 HP) continuous motor, with 5.5 kW (7.5 HP) on the 10 min. rating and 26 ft-lb (35 Nm) of torque on the 3 min. rating. That is enough for cross-drilling, tapping and light milling of flats, not for heavy slotting. Tooling is 1 in (25 mm) shank with Ø1 in (25 mm) boring bars. The machine is on Mazak's 600U bed class, occupies 113 in (2,870 mm) × 91 in (2,311 mm) with the MAZATROL SmoothG control, and weighs 20,194 lb (9,160 kg).