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 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 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 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.
- Compatibility, lineage, or lifecycle crosswalk: supersedes to haas-st-20-previous-generation (manufacturer-documented-generation). Generation relationship only; serial-specific applicability still requires the machine identification record. Evidence: https://www.haascnc.com/machines/lathes/st/models/standard/st-20.html
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.
Official product references
We work to keep this information reliable, but specifications and availability can change. Verify critical details with the manufacturer through the official resources above.