Japanese machine tool manufacturer Makino has introduced a new five-axis horizontal machining centre (HMC), which made its debut at the EMO exhibition in Milan last October. Productivity on a five-axis machine is sometimes lower than on a four-axis model, but not with the a800Z, according to sole UK and Ireland agent NCMT.

The jacket-cooled spindles provide the same power as on a Makino a81nx four-axis HMC. In addition, the standard 10,000 rpm BT50 (HSK-A100 optional) spindle takes just 2.7 seconds to reach maximum speed and is rated at 55 kW (25% DC), 27 kW (continuous), while torque is 721 Nm (10% DC), 305 Nm (continuous). An optional 8000 rpm spindle provides uprated power at 75/37 kW and higher torque at 1199/552 Nm.

By raising the rear X-axis guideway above the one at the front, the column travels over a slanted plane. This capability allows the efficient transfer of high cutting forces during heavy-duty machining, and maximises the rigidity of the machine structure. Furthermore, the design reduces the weight of the moving column, minimising jerk during acceleration and deceleration. The machining envelope is defined by axis travels of 1,280 × 1,200 × 1,325 mm, actuation being by cooled, large-diameter ballscrews.

Productivity and short idle times are ensured by up to 50 m/min cutting feed rate and 60 m/min rapids. Maximum weight of the fixtured workpiece on the 630 x 630 mm pallet is 1 tonne, excluding the weight of the pallet.

Makino’s a800Z has a high-capacity chip management system. The interior, near-vertical walls in the working area are stainless steel to minimise chip adherence and promote swarf evacuation via three channels in the machine base.

For further information
www.ncmt.co.uk