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Haas ST-20 Previous Generation
Haas documents a previous ST-20 generation alongside the redesigned current machine. The predecessor has 9.3-inch X travel, 21-inch Z travel, 2-inch bar capacity, 31.75-inch maximum part swing, and a 125 x 78 x 77 inch footprint without conveyor. These values must not be merged with the redesigned ST-20 record.
- Builder: Haas Automation.
- Series: ST Series.
- Lifecycle status: discontinued-generation.
- Successor: Redesigned Haas ST-20.
- Official Haas comparison data identifies this as the previous model; use serial number and build date to establish the exact revision and control generation.
Company overview
Haas documents a previous ST-20 generation alongside the redesigned current machine. The predecessor has 9.3-inch X travel, 21-inch Z travel, 2-inch bar capacity, 31.75-inch maximum part swing, and a 125 x 78 x 77 inch footprint without conveyor. These values must not be merged with the redesigned ST-20 record.
Industries and applications
- Maximum documented part swing: 31.75 in / 806 mm.
- Maximum documented cutting diameter with BOT turret: 15 in / 381 mm; maximum cutting length varies with workholding and is documented as 21 in / 533 mm.
Technical and quote details
- X travel: 9.3 in / 236 mm.
- Z travel: 21.0 in / 533 mm.
- Spindle interface: A2-6 spindle nose.
- Spindle speed: 4,000 rpm.
- Spindle power: 20 hp / 14.9 kW.
- Spindle drive: belt drive.
- Spindle barCapacity: 2.0 in / 51 mm.
- Tool capacity: BOT turret configuration documented; verify station count and turret build from the serial-specific machine record.
- Control: Haas CNC control.
- Control: Control hardware and software generation depend on build year.
- Control: Verify options and software against serial-specific Haas service documentation.
- Compatibility, lineage, or lifecycle crosswalk: supersedes to haas-st-20 (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
- Haas labels the comparison column previous model but does not identify every production revision or serial break on the comparison page.
- Control generation, turret station count, options, service parts, and retrofit compatibility require serial-specific documentation.
- The previous generation and redesigned ST-20 share a model name but differ materially in travels, swing, bar capacity, cutting envelope, and footprint.
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.