The Haas ST-35 is a 2-axis CNC lathe with a reputation for simple operation and dependable output that has made it a staple in job shops and production turning departments. This 2022 Haas ST-35 CNC turning center carries a 12" 3-jaw hydraulic chuck on an A2-8 spindle nose, a 4.0" bar capacity, and a 4.62" spindle bore for large-diameter bar and tube work. The spindle is rated at 40 HP and 3,200 RPM with 425 ft-lbf of torque at 325 RPM, giving the machine the low-end muscle for heavy roughing in steels and alloys. The work envelope includes a 21" max swing, 15" max cutting diameter with the bolt-on tool turret, 32.5" max cutting length, and 32.5" between centers, with X 9.4 / Z 32.5 inch travels and 945 ipm rapids on both axes. Tooling is handled by a 12-station bolt-on tool (BOT) turret, and long parts are supported by a programmable hydraulic tailstock. The Haas CNC control with touch screen includes Ethernet and Wi-Fi connectivity, rigid tapping, and spindle orientation, and the machine is equipped with an automatic tool presetter, a belt-type chip conveyor, and a chip tray filter kit.
The ST-35 belongs to the Haas ST series, which succeeded the earlier Haas SL-30 and SL-40 lathes, including the SL-30 Big Bore. Where the SL machines were built on the older Haas lathe platform, the ST series was redesigned from the ground up with a more rigid structure and a more compact footprint for heavier cuts in less floor space. The ST-35 fills the gap between the ST-30 and ST-40 by pairing a 12" chuck and A2-8 spindle with a 4.0" bar capacity, so shops get big-bore capacity without stepping up to a larger, heavier frame. A 2022 build also runs the current Haas control software with touch screen operation and network connectivity, a meaningful step up in programming speed and data handling over SL-era controls. For a buyer, that means a larger work envelope per square foot, faster setups, and a modern platform that is easier to staff and support than any SL-series predecessor.