Haas ST-40Y

The Haas ST-40Y is a Y-axis lathe on the 35.5 in (902 mm) swing frame with 44 in (1,118 mm) of turning length, a 27.5 in (699 mm) maximum turning diameter and a 12-station BMT75 turret driving live tools at 4,000 rpm.

Tool count is the first thing to check on a turn-mill job, because turning tools, boring bars, drills, taps and end mills all compete for the same turret. Haas offers a 24-station half-index turret as an option, which is the answer when the standard 12 are not enough. The turret indexes in 2 s and accepts any combination of OD and ID tools, with 4.5 in (114 mm) of boring-bar clearance measured from the turret face.

The Y axis travels ± 3 in (± 76 mm) with 2,300 lbf (10,231 N) of thrust. Full C-axis interpolation is part of the machine: 0.01° positioning, 49 rpm, 5 hp (3.7 kW), and a 21.5 in (546 mm) brake with 450 ft-lbf (610 N·m) of holding torque. X and Y rapid at 472 ipm (12 m/min) and Z at 710 ipm (18 m/min). The two-axis ST-40 has the same 44 in (1,118 mm) of length but turns 30 in (762 mm) and rapids at 710 ipm (18 m/min).

For turning, a 2-speed gearbox gives 1,400 ft-lbf (1,898 N·m) at 150 rpm from 40 hp (29.8 kW), up to 2,400 rpm. The XP option raises that to 55 hp (41 kW) and 2,100 ft-lbf (2,847 N·m) at 150 rpm. The tailstock is MT5 with 42 in (1,067 mm) of travel.

WiFi, HaasDrop wireless file transfer, Safe Run and HaasConnect remote monitoring are standard; the automatic door is optional. Haas lists a starting price of US$241,995, and the machine weighs 22,880 lb (10,378 kg) in its export crate.