Haas ST-30LY

The Haas ST-30LY adds a Y axis and a C axis to the long ST-30 platform: 62.5 in (1,588 mm) between centers, 13.75 in (349 mm) maximum turning diameter, ± 2 in (± 51 mm) of Y travel, and a 30 hp (22.4 kW) spindle behind a 10 in (254 mm) chuck.

Among its neighbours it is the long one. The ST-28LY, the other long Y-axis model nearby, has 42.5 in (1,080 mm) of turning length and an 11.75 in (298 mm) turning diameter, with 4 in (102 mm) of bar capacity where this machine passes 3 in (76 mm). Pick this model for length and diameter, the other for bore.

Milling along a part of this length depends on support, and Haas supplies it. A programmable tailstock with a #4 Morse taper is standard, and a steady rest provision is an option for extra-long parts. The standard extended tool pocket in the bulkhead clears tools up to 30 in (762 mm) long, depending on workholding. A scissor-style Z-axis waycover is standard too.

The C axis turns at up to 60 rpm with a 5 hp (3.7 kW) rating and positions to 0.01°, and a 13.9 in (353 mm) brake holds 250 ft-lbf (339 N·m). X and Y rapid at 472 ipm (12 m/min), Z at 945 ipm (24 m/min). There is one gap to close before ordering: the table for this model gives no live-tool speed or tooling-interface row, so get the driven-tool specification from Haas in writing.

The main spindle makes 300 ft-lbf (407 N·m) at 500 rpm and reaches 3,400 rpm; an optional gearbox raises torque to 1,000 ft-lbf (1,356 N·m) at 150 rpm. The machine weighs 13,300 lb (6,033 kg) and ships on a 202 × 90 × 92 in (513 × 229 × 234 cm) pallet. Haas lists a starting price of US$178,995.