Hurco VMX42UDi

The Hurco VMX42UDi is a 5-axis trunnion machining center with 1,067 x 610 x 520 mm (42 x 24 x 20.5 in) of linear travel, a 398 mm (15.7 in) rotary table and a 15,000 rpm CAT 40 / Big Plus spindle. The trunnion tilts the A axis from +30° to -110° and the C axis turns through 360°, both at up to 25 rpm. The VMX42UDi does not appear in Hurco's current lineup and looks to be an older model, so most buyers will be weighing a used machine.

On a trunnion machine the rotary table, not the linear travels, sets the size of the part. Here it is 398 mm (15.7 in) across with six 14 mm T-slots, and it carries 250 kg (550 lb) including vise or fixture. Parts that overhang the table edge need checking for clearance as the A axis swings. The spindle nose sits 90 mm to 610 mm (3.5 in / 24 in) from the table, which leaves room for a fixture riser and a long tool on most work of this size.

The spindle peaks at 18 kW (24 hp) and gives 95 Nm (70.4 ft. lbs) at 1,500 rpm. That is a speed-oriented package: it suits small and mid-size end mills in aluminium and finishing passes in steel, and it will run out of torque before a large face mill or heavy roughing cut does. The smaller VMX30UDi uses the same 15,000 rpm speed and 95.5 Nm (70.4 ft-lb) torque with 15 kW (20 hp) on a 248 mm (9.8 in) table, so the VMX42UDi is the step up for bigger parts rather than harder cutting.

Rapids are 45 m/min (1,771 ipm) on X and Y and 40 m/min (1,575 ipm) on Z. The 40-tool changer takes CAT, BT or DIN 40 holders up to 76 mm (3 in) in diameter, 300 mm (11.8 in) long and 7 kg (15.4 lb). Plan for a 7,200 kg (15,840 lb) machine standing 3,237 mm (127.4 in) tall on a 4,578 x 3,719 mm (180 x 146 in) footprint, with a 31 kVA supply. It runs Hurco's WinMax control, which takes conversational programs written at the machine as well as NC code.