The Haas Automation ST-20 is an industrial-grade CNC Lathes & Turning Centers powered by the Standard CNC. a top spindle speed of 4,000 RPM, and a 3-axis kinematic layout. It supports standardized digital factory monitoring via MTConnect.
Haas ST-20 lathe: 8.3 in (210 mm) chuck, 2.5 in (64 mm) bar capacity, 13 in (330 mm) turning diameter, 20 hp spindle to 4,000 rpm.
| Standardized Parameters & Ratings | |
|---|---|
| Manufacturer (Brand) | Haas Automation (United States) |
| Machine Type | CNC Lathes & Turning Centers |
| CNC Controller System | Standard CNC |
| Number of Controlled Axes | 3-Axis Simultaneous / Positioning |
| Maximum Spindle Speed | 4,000 RPM |
| Spindle Motor Rating | 20.0 kW |
| Spindle Taper Interface | Standard |
| Approx. Machine Weight | 8,820 kg |
| Industrial IoT Protocol | MTConnect ANSI/MTC1.4 Compliant (Ethernet/TCP) |
| Chuck Size | 8.3 in (210 mm) |
| Max Swing | 21 in (533 mm) |
| Max Turning Diameter | 13 in (330 mm) |
| Max Turning Diameter With Bmt65 Turret | 11.75 in (298 mm) |
| Max Turning Diameter With Vdi Turret | 11.8 in (300 mm) |
| Max Turning Length | 22.5 in (572 mm) |
| Bar Capacity | 2.5 in (64 mm) |
| X-Axis Travel | 8.4 in (213 mm) |
| Z-Axis Travel | 22.5 in (572 mm) |
| Rapid Traverse | 945 ipm (24 m/min) |
| Max Thrust X | 4,100 lbf (18,238 N) |
| Max Thrust Z | 5,100 lbf (22,686 N) |
| Spindle Nose | A2-6 |
| Spindle Drive | Direct Speed, Belt Drive |
| Spindle Motor Power | 20 hp (14.9 kW) |
| Max Spindle Speed | 4,000 rpm |
| Spindle Torque | 150 ft-lbf @ 500 rpm (203 N·m @ 500 rpm) |
| Spindle Bore | 3.5 in (88.9 mm) |
| Sub Spindle Chuck Size | 5.3 in |
| Sub Spindle Nose | A2-5 |
| Sub Spindle Speed | 6,000 rpm |
| Sub Spindle Max Sync Speed With Main Spindle | 4,800 rpm |
| Sub Spindle Chuck Throat | Ø 1.3 in × 1.37 in DEEP (Ø 33 mm × 34.8 mm DEEP) |
| Sub Spindle Drawbar Bore | Ø 1 in × 4.5 in DEEP (Ø 25.4 mm × 114.3 mm DEEP) |
| Sub Spindle Spindle Bore | 1.5 in (38.1 mm) |
| Sub Spindle Integrated Brake Torque | 17 ft-lbf (23 N·m) |
| Sub Spindle Spindle Orientation Accuracy | ± 0.02 ° |
| Sub Spindle Rapids | 400 ipm (10 m/min) |
| Turret Stations | 12 |
| Turret Od Vs Id Tools | Any Combination (will vary with turret) |
| Turret Boring Bar Rear Clearance | 4 in (102 mm) |
| Coolant Capacity | 55 gal (208 L) |
| Air Required | 4 scfm @ 100 psi (113 L/min @ 6.9 bar) |
| Inline Air Hose | 3/8 in |
| Air Coupler | 3/8 in |
| Air Pressure Min | 80 psi (5.5 bar) |
| Electrical Low | 220 VAC 3-phase, 40 A |
| Electrical High | 440 VAC 3-phase, 20 A |
| Shipping Domestic Pallet | 142.5 × 90 × 92 in (362 × 229 × 234 cm) |
| Shipping Export Pallet | 142.5 × 90 × 92 in (362 × 229 × 234 cm) |
| Machine Weight | 8,820 lb (4,000 kg) |
Haas Automation publishes a list price of US$77,995 for the Haas ST-20 (verified 2026-10-02). Options, tooling, freight and installation are extra, so a dealer quote will differ. A specific price can be requested at https://machinetoolindex.com/machines/haas-st-20#price; the request is passed to Haas Automation or an authorised dealer.
Haas's feature list marks the sub-spindle, the two-stage automatic parts catcher, the automatic parts loader and the new-design tailstock as optional. WiFi is listed as standard. Treat the sub-spindle figures in the spec table, such as the 5.3 in chuck and 6,000 rpm speed, as describing that option.
Same travels, bigger spindle package on the ST-25. Both have 8.4 in (213 mm) of X, 22.5 in (572 mm) of Z and a 13 in (330 mm) maximum turning diameter. The ST-20 has an 8.3 in (210 mm) chuck, 2.5 in (64 mm) of bar capacity and 20 hp (14.9 kW) at 4,000 rpm; the ST-25 has a 10 in (254 mm) chuck, 3 in (76 mm) of bar capacity and 30 hp (22.4 kW) at 3,400 rpm.
Haas lists new castings that are more compact and more rigid, an 11% smaller footprint than the predecessor, a larger spindle bore for increased bar capacity, increased Z-axis travel, an increased wedge angle and improved part-loading ergonomics. The current table shows a 3.5 in (88.9 mm) bore, 2.5 in (64 mm) of bar capacity and 22.5 in (572 mm) of Z.
Up to 13 in (330 mm) in diameter and 22.5 in (572 mm) long, under a 21 in (533 mm) swing. With a BMT65 turret the diameter limit is 11.75 in (298 mm) and with a VDI turret 11.8 in (300 mm). X travel is 8.4 in (213 mm).
Electrical supply is 220 VAC three-phase at 40 A or 440 VAC three-phase at 20 A. Air is 4 scfm at 100 psi (113 L/min at 6.9 bar), with 80 psi (5.5 bar) the minimum, on a 3/8 in hose and coupler. It ships at 8,820 lb (4,000 kg) on a 142.5 × 90 × 92 in (362 × 229 × 234 cm) pallet.
