The Haas Automation ST-20Y 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-20Y: Y-axis lathe, 8.3 in (210 mm) chuck, 22.5 in (572 mm) turning length, 4,000 rpm live tools, optional sub-spindle and parts loader.
| 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 | 10,480 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 | 11.75 in (298 mm) |
| Max Turning Length | 22.5 in (572 mm) |
| Bar Capacity | 2.5 in (64 mm) |
| X-Axis Travel | 8.4 in (213 mm) |
| Y-Axis Travel | ± 2 in (± 51 mm) |
| Z-Axis Travel | 22.5 in (572 mm) |
| Rapid Traverse X | 472 ipm (12 m/min) |
| Rapid Traverse Y | 472 ipm (12 m/min) |
| Rapid Traverse Z | 945 ipm (24 m/min) |
| Max Thrust X | 4,100 lbf (18,238 N) |
| Max Thrust Y | 2,300 lbf (10,231 N) |
| Max Thrust Z | 5,100 lbf (22,686 N) |
| Spindle Nose | A2-6 |
| 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) |
| C Axis Max Rating | 5 hp (3.7 kW) |
| C Axis Speed | 60 rpm |
| C Axis Positioning | 0.01 ° |
| C Axis Brake Diameter | 13.9 in (353 mm) |
| C Axis Brake Holding Torque | 250 ft-lbf (339 N·m) |
| C Axis Control Type | Interpolated Motion and Positioning |
| Sub Spindle Chuck Size | 5.3 in (135 mm) |
| 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 × 1.5 in 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) |
| Live Tool Speed | 4,000 rpm |
| Live Tooling | BMT65 |
| 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 | 143 × 90 × 92 in (363 × 229 × 234 cm) |
| Shipping Export Pallet | 143 × 90 × 92 in (364 × 229 × 234 cm) |
| Machine Weight | 10,480 lb (4,754 kg) |
Haas Automation publishes a list price of US$114,995 for the Haas ST-20Y (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-20y#price; the request is passed to Haas Automation or an authorised dealer.
No. Haas lists it as an option. The sub-spindle rows in the table describe a 5.3 in (135 mm) chuck on an A2-5 nose, a top speed of 6,000 rpm, a 1.5 in (38.1 mm) spindle bore, a 17 ft-lbf (23 N·m) integrated brake, orientation accuracy of ± 0.02° and rapids of 400 ipm (10 m/min).
Haas's feature list names 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. WiFi is standard. The table shows the result as a 3.5 in (88.9 mm) bore and 22.5 in (572 mm) of Z.
The ST-20 is a two-axis lathe that turns 13 in (330 mm) in diameter and rapids at 945 ipm (24 m/min). The ST-20Y adds a Y axis, a C axis and live tools, turns 11.75 in (298 mm), and its X and Y rapids are 472 ipm (12 m/min). Chuck, bar capacity, spindle power and turning length are the same on both.
BMT65 tooling, driven at up to 4,000 rpm. The turret has 12 stations and Haas lists OD and ID tools in any combination, depending on the turret. There is 4 in (102 mm) of clearance behind the turret for boring bars. Y-axis thrust is 2,300 lbf (10,231 N).
It weighs 10,480 lb (4,754 kg) and ships on a pallet of 143 × 90 × 92 in. Power is 220 VAC three-phase at 40 A or 440 VAC at 20 A. Air is 4 scfm at 100 psi (113 L/min at 6.9 bar), with 80 psi (5.5 bar) as the minimum, and the coolant tank holds 55 gal (208 L).
