Haas ST-40L

For shafts, rolls and long tube, the Haas ST-40L stretches the bed to 80 in (2,032 mm) of turning length while keeping a 30 in (762 mm) maximum turning diameter and a 15 in (381 mm) chuck. Swing is 35.5 in (902 mm).

Length changes more than the envelope. Z rapid on this machine is 320 ipm (8.1 m/min), well below the 710 ipm (18 m/min) on X, so long positioning moves take real time and are worth planning around. The tailstock travels 84.5 in (2,146 mm), which is more than the Z stroke, and applies between 200 lbf (890 N) and 3,000 lbf (13,345 N) through an MT5 taper. On a long, heavy workpiece that range is what keeps the part seated without bowing it.

The spindle is rated 40 hp (29.8 kW) and 1,400 ft-lbf (1,898 N·m) at 150 rpm, with 2,400 rpm at the top and a 4.62 in (117.3 mm) bore behind an A2-8 nose. Bar capacity is 4 in (102 mm). The table also describes an XP option with a 2-speed gearbox, 55 hp (41 kW) and 2,100 ft-lbf (2,847 N·m) at 150 rpm; it draws 105 A at 220 VAC or 53 A at 440 VAC, against 70 A or 35 A for the base supply.

Turret figures: 12 stations, BOT style, any mix of OD and ID tools, and 4.37 in (111 mm) of rear boring-bar clearance. With a BMT75 turret the turning diameter is 27.5 in (699 mm). Feed thrust is 9,000 lbf (40,034 N) on Z and 5,500 lbf (24,465 N) on X.

This is a heavy delivery. The machine weighs 29,900 lb (13,563 kg) and ships on a domestic pallet measuring 254 × 95 × 116 in (646 × 242 × 295 cm), so rigging and floor loading need checking before the order. Haas lists a starting price of US$227,995.