Hyundai WIA XM3100 Series

With 1,262 / 1,003 N·m (930.9 / 739.8 ft-lbf) at the main spindle, the Hyundai WIA XM3100 Series is the high-torque half of WIA's two XM mill-turn series. Work is held in a 12 in (305 mm) chuck and driven by a built-in 37 / 30 kW (49.6 / 40.2 hp) spindle that tops out at 4,000 rpm, while a separate head reaching 12,000 RPM does the milling.

Torque is the reason to pick it. The XM2600 lists 724 / 410 N·m (534 / 302.4 ft-lbf) and 30 / 22 kW (40.2 / 29.5 hp) behind a 10 in (254 mm) chuck. Measured against the XM2600, the first torque figure here is about 74% higher and the second is more than double. Reach does not change between them, since each series is listed with a maximum turning diameter of 660 mm (26 in) and a maximum turning length of 1540 mm (60.6 in). What the larger spindle buys is depth of cut at big diameters in steel, where the low spindle speeds involved make torque the limit long before power.

On the milling side the table reads 40T ATC as standard, with 80T and 120T magazines as options, and travels of 695 mm (27.4 in) on X1, 1,585 mm (62.4 in) on Z1 and 300 mm (11.8 in) on Y. A heavy turning job often ends with a few cross holes, a keyway or a milled flat, and the head and its Y stroke deal with those without a second machine. No power or torque is listed for the mill head, so treat heavy milling as unconfirmed until WIA supplies the figures. The table is equally silent on spindle bore and bar capacity.

Buyers who want a second tool carrier should look at the XM3100ST. The lower turret, with 12 stations, and the 1,540 mm (60.6 in) Z2 travel are marked for that model alone. WIA prints the rapid traverse figures as 48/48/36 for X1/Z1/Y and gives no unit for them.