Index G220

The Index G220 is a turn-mill center with a 220 mm (8.66 in) maximum turning diameter, 660 mm (26 in) of turning length and 65 mm (2.6 in) bar capacity. Its table stands out for the counter spindle, which is rated 29 kW (39 HP) at up to 6,000 RPM, more than the 20 kW continuous and 24 kW at 40% duty of the main spindle. Second-side work on this machine is not a light finishing step; the counter spindle can carry real turning load.

The main spindle runs to 6,000 rpm with a 165 mm (6.5 in) chuck. Torque is 125 Nm continuous and 170 Nm at 40% duty, and the table also gives a 207 Nm maximum. The G200 sibling is listed with a 200 mm (7.9 in) turning diameter on the same spindle figures, so the G220 is the choice when the part is just over that diameter.

Two milling figures appear. A milling spindle reaches 12,000 RPM at 12 kW, while turret-driven tools on HSK-A40 run to 7,200 rpm with 9 kW and 16 Nm. The 12,000 RPM spindle makes small end mills and drills in aluminium and brass practical; the driven tools cover cross drilling and lighter milling. The lower turret takes up to 12 tools.

Travels are 230 mm (9.1 in) in X and 845 mm (33.3 in) in Z, with 30 m/min rapid on X and 50 m/min on Z, and the tailstock row gives the same 845 mm (33.3 in). For shafts toward the 660 mm limit, a tailstock or steady support decides how much cut the part will take, so confirm what is included.

The control is a Siemens S840D sl. Installation needs 5355 × 2235 × 2400 mm (L × W × H) of floor, a foundation for approx. 8,500 kg (18,739 lb) and a 42 kW supply.