Haas ST-20
The current Haas ST-20 is an A2-6 turning center with an 8.3-inch chuck, 2.5-inch bar capacity, 13-inch maximum published cutting diameter with the bolt-on turret, and 22.5-inch maximum cutting length. Haas also documents a previous ST-20 generation with different swing, bar capacity, travels, and footprint, so generation and serial context are required.
- Builder: Haas Automation.
- Series: ST Series.
- Lifecycle status: current.
Company overview
The current Haas ST-20 is an A2-6 turning center with an 8.3-inch chuck, 2.5-inch bar capacity, 13-inch maximum published cutting diameter with the bolt-on turret, and 22.5-inch maximum cutting length. Haas also documents a previous ST-20 generation with different swing, bar capacity, travels, and footprint, so generation and serial context are required.
Industries and applications
- 8.3 in / 210 mm chuck and 2.5 in / 64 mm bar capacity.
- Maximum cutting diameter and rear boring-bar clearance vary with turret configuration; maximum cutting length also varies with workholding.
Technical and quote details
- X travel: 8.4 in / 213 mm.
- Z travel: 22.5 in / 572 mm.
- Spindle interface: A2-6 spindle nose.
- Spindle speed: 4,000 rpm.
- Spindle power: 20 hp / 14.9 kW.
- Spindle torque: 150 ft-lbf at 500 rpm / 203 Nm at 500 rpm.
- Spindle bore: 3.50 in / 88.9 mm.
- Tool capacity: 12-station bolt-on or VDI turret in the published standard-feature list.
- Control: Haas Control.
- Control: Ethernet.
- Control: WiFi.
- Control: Advanced Tool Management.
- Control: HaasConnect.
- Control: Rigid tapping.
- Control: 1 GB standard program memory.
Selection notes
Variables to validate
- The current and previous ST-20 generations have materially different swing, bar capacity, travels, and footprint.
- Turret, chuck, sub-spindle, live-tooling, Y-axis, workholding, and automation options change the actual machine capability.
- A model-level record is insufficient for service or retrofit work; retain serial number, build date, control software, option codes, and manuals when available.