Haas ST-10LY

The Haas ST-10LY is a small-bore mill-turn lathe on a long bed. It pairs a 6.5 in (165 mm) chuck and 1.75 in (44 mm) of bar capacity with 32.5 in (826 mm) of Z travel, a Y axis of ± 2 in (± 51 mm) and BMT45 live tools at 4,000 rpm. The main spindle is 15 hp (11.2 kW) and runs to 6,000 rpm.

Start with what the Y axis changes against the ST-10L, which shares this bed. Maximum turning diameter drops from the ST-10L's 12 in (305 mm) to 11 in (279 mm). The X rapid is 472 ipm (12 m/min) here, as is Y, while Z keeps the 1,200 ipm (30.5 m/min) the ST-10L has on both axes. Thrust is split unevenly too: 2,400 lbf (10,676 N) on X, 2,300 lbf (10,231 N) on Y and 3,700 lbf (16,458 N) on Z, so Z has about 54% more push than X.

For milling, the live tools and the C axis do the work. The C axis interpolates and positions to 0.02° at up to 60 rpm, and a 9.5 in (241 mm) brake holds 140 ft-lbf (190 N·m). That holding torque, not the spindle motor, limits how hard a live tool can push against a clamped part. The Y stroke is wider than the 1.75 in bar the spindle passes, so flats, slots and off-centre holes on bar parts are within reach in one clamping.

The turret has 12 stations and 3.8 in (96.5 mm) of rear clearance for boring bars. The table lists a tailstock (MT3, 44 in (1,118 mm) of manual body positioning, 3.8 in (95 mm) of hydraulic quill travel) and a set of sub-spindle figures: 5.3 in (135 mm) chuck, 6,000 rpm, 4,800 rpm when synchronised with the main spindle. Have Haas confirm what the quoted machine carries at the tail end.

Draw tube bore is 1.81 in (46 mm) inside a 2.31 in (58.7 mm) spindle bore on an A2-5 nose, and torque is 75 ft-lbf (102 N·m) at 1,300 rpm. The machine ships at 10,000 lb (4,536 kg), and Haas lists a starting price of US$136,995.