The Haas Automation ST-20LY 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-20LY: long-bed Y-axis lathe with 42.5 in (1,080 mm) of Z, ± 2 in Y travel, 4,000 rpm BMT65 live tools and a 20 hp spindle.
| 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 | 12,360 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 | 42.5 in (1,080 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 | 42.5 in (1,080 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 Speed | 60 rpm |
| C Axis Max Rating | 5 hp (3.7 kW) |
| 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 |
| 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 | 190 × 90 × 90 in (483 × 229 × 229 cm) |
| Shipping Export Pallet | 190 × 90 × 90 in (483 × 229 × 229 cm) |
| Machine Weight | 12,360 lb (5,606 kg) |
Haas Automation publishes a list price of US$153,995 for the Haas ST-20LY (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-20ly#price; the request is passed to Haas Automation or an authorised dealer.
The ST-20L is a two-axis lathe with a 13 in (330 mm) turning diameter. The ST-20LY adds ± 2 in (± 51 mm) of Y travel, a C axis and BMT65 live tools at 4,000 rpm, so it can mill flats, slots and off-centre holes. In exchange the turning diameter is 11.75 in (298 mm), and the weight is 12,360 lb (5,606 kg) against 11,520 lb for the ST-20L.
Up to 4,000 rpm, on a BMT65 interface. That matches the main spindle's 4,000 rpm maximum. The table gives no power or torque figure for the live-tool drive, so ask Haas for it if the job involves heavy milling instead of drilling and light slotting.
Haas lists the control type as interpolated motion and positioning, so the C axis can contour with a live tool as well as index. Positioning is 0.01°, maximum speed is 60 rpm and the rating is 5 hp (3.7 kW). The brake is 13.9 in (353 mm) in diameter and holds 250 ft-lbf (339 N·m).
Not in the same cycle, going by the table: there are no sub-spindle rows for this model. The part has to be turned around by hand or run as a second operation. What the machine does offer in one chucking is turning and milling along 42.5 in (1,080 mm) of Z.
220 VAC three-phase at 40 A, or 440 VAC three-phase at 20 A. It uses 4 scfm of air at 100 psi (113 L/min at 6.9 bar) and needs at least 80 psi (5.5 bar) at the inlet. Coolant capacity is 55 gal (208 L). It ships on a 190 × 90 × 90 in (483 × 229 × 229 cm) pallet.
