The Haas Automation ST-40Y is an industrial-grade CNC Lathes & Turning Centers powered by the Standard CNC. a top spindle speed of 2,400 RPM, and a 3-axis kinematic layout. It supports standardized digital factory monitoring via MTConnect.
Haas ST-40Y: Y-axis lathe, 27.5 in (699 mm) turning diameter, 44 in length, 12-station BMT75 turret, 4,000 rpm live tools, ± 3 in Y travel.
| 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 | 2,400 RPM |
| Spindle Motor Rating | 40.0 kW |
| Spindle Taper Interface | Standard |
| Industrial IoT Protocol | MTConnect ANSI/MTC1.4 Compliant (Ethernet/TCP) |
| Chuck Size | 15 in (381 mm) |
| Max Swing | 35.5 in (902 mm) |
| Max Turning Diameter | 27.5 in (699 mm) |
| Max Turning Length | 44 in (1,118 mm) |
| Bar Capacity | 4 in (102 mm) |
| X-Axis Travel | 20 in (508 mm) |
| Y-Axis Travel | ± 3 in (± 76 mm) |
| Z-Axis Travel | 44 in (1,118 mm) |
| Rapid Traverse X | 472 ipm (12 m/min) |
| Rapid Traverse Y | 472 ipm (12 m/min) |
| Rapid Traverse Z | 710 ipm (18 m/min) |
| Max Thrust X | 5,500 lbf (24,465 N) |
| Max Thrust Y | 2,300 lbf (10,231 N) |
| Max Thrust Z | 9,000 lbf (40,034 N) |
| Spindle Nose | A2-8 |
| Spindle Drive | 2-Speed Gearbox |
| Spindle Motor Power | 40 hp (29.8 kW) |
| Max Spindle Speed | 2,400 rpm |
| Spindle Torque | 1,400 ft-lbf @ 150 rpm (1,898 N·m @ 150 rpm) |
| Spindle Bore | 4.62 in (117.3 mm) |
| Xp Option Drive System | 2-Speed Gearbox |
| Xp Option Max Rating | 55 hp (41 kW) |
| Xp Option Max Speed | 2,400 rpm |
| Xp Option Max Torque | 2,100 ft-lbf @ 150 rpm (2,847 N·m @ 150 rpm) |
| Xp Option Input Ac Voltage Low | 220 VAC |
| Xp Option Full Load Amps Low | 105 A |
| Xp Option Input Ac Voltage High | 440 VAC |
| Xp Option Full Load Amps High | 53 A |
| C Axis Max Rating | 5 hp (3.7 kW) |
| C Axis Speed | 49 rpm |
| C Axis Positioning | 0.01 ° |
| C Axis Brake Diameter | 21.5 in (546 mm) |
| C Axis Brake Holding Torque | 450 ft-lbf (610 N·m) |
| C Axis Control Type | Interpolated Motion and Positioning |
| Tailstock Taper | MT5 |
| Tailstock Travel | 42 in (1,067 mm) |
| Tailstock Max Thrust Acme | 3,000 lbf (13,345 N) |
| Tailstock Min Thrust Acme | 200 lbf (890 N) |
| Turret Stations | 12 |
| Turret Od Vs Id Tools | Any Combination (will vary with turret) |
| Turret Index Time | 2 s |
| Turret Boring Bar Rear Clearance From Turret Face | 4.5 in (114 mm) |
| Turret Tooling | BMT75 |
| Live Tool Speed | 4,000 rpm |
| Live Tooling | BMT75 |
| Coolant Capacity | 95 gal (360 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, 70 A |
| Electrical High | 440 VAC 3-phase, 35 A |
| Shipping Domestic Pallet | 216.5 × 94.3 × 110 in (550 × 239 × 279 cm) |
| Shipping Export Pallet | 216.5 × 98 × 120 in (550 × 249 × 305 cm) |
| Machine Weight Export Crate | 22,880 lb (10,378 kg) |
Haas Automation publishes a list price of US$241,995 for the Haas ST-40Y (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-40y#price; the request is passed to Haas Automation or an authorised dealer.
The standard BMT75 turret has 12 stations and indexes in 2 s. Haas lists a 24-station half-index turret as an option. Live tools run at up to 4,000 rpm, and any combination of OD and ID tools can be mounted, varying with the turret.
Turning diameter and X rapid. The ST-40 turns 30 in (762 mm) and rapids at 710 ipm (18 m/min). The ST-40Y turns 27.5 in (699 mm), with 472 ipm (12 m/min) on X and Y and 710 ipm (18 m/min) on Z. Turning length, chuck, bar capacity and the 1,400 ft-lbf (1,898 N·m) spindle are unchanged.
Standard, according to Haas's feature list: the 12-station BMT75 turret, 4,000 rpm live tooling, full C-axis interpolation, WiFi, HaasDrop wireless file transfer, Safe Run and HaasConnect remote monitoring. Optional: the 24-station half-index turret and the automatic door. The XP spindle rows in the table (55 hp (41 kW), 2,100 ft-lbf (2,847 N·m) at 150 rpm) also describe an option.
Control type is interpolated motion and positioning. Maximum speed is 49 rpm, maximum rating 5 hp (3.7 kW) and positioning 0.01°. The brake measures 21.5 in (546 mm) and holds 450 ft-lbf (610 N·m), which is what resists the cut when a live tool works with the spindle clamped.
The ST-40LY has the same ± 3 in (± 76 mm) Y travel, 27.5 in (699 mm) turning diameter and 4,000 rpm live tools on an 80 in (2,032 mm) turning length, with a Z rapid of 320 ipm (8.1 m/min). The ST-40Y sits at 44 in (1,118 mm) with a 710 ipm (18 m/min) Z rapid.
