The Haas Automation ST-40S 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-40S: short-bed lathe turning 30 in (762 mm) diameter by 28 in (711 mm), 15 in chuck, 40 hp gearbox spindle, 1,400 ft-lbf at 150 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 | 2,400 RPM |
| Spindle Motor Rating | 40.0 kW |
| Spindle Taper Interface | Standard |
| Approx. Machine Weight | 20,400 kg |
| 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 | 30 in (762 mm) |
| Max Turning Diameter With Bmt75 Turret | 27.5 in (699 mm) |
| Max Turning Length | 28 in (711 mm) |
| Bar Capacity | 4 in (102 mm) |
| X-Axis Travel | 20 in (508 mm) |
| Z-Axis Travel | 28 in (711 mm) |
| Rapid Traverse | 710 ipm (18 m/min) |
| Max Thrust X | 5,500 lbf (24,465 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 |
| Tailstock Taper | MT5 |
| Tailstock Travel | 26 in (660 mm) |
| Tailstock Max Thrust Acme | 3,000 lbf (13,345 N) |
| Tailstock Min Thrust Acme | 200 lbf (890 N) |
| Turret Stations | 12-Station BOT |
| Turret Od Vs Id Tools | Any Combination (will vary with turret) |
| Turret Boring Bar Rear Clearance | 4.5 in (114 mm) |
| Turret Tooling | BOT |
| 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 × 94.5 × 116 in (550 × 240 × 295 cm) |
| Shipping Export Crate | 216.5 × 95 × 120 in (550 × 241 × 305 cm) |
| Machine Weight | 20,400 lb (9,253 kg) |
Haas Automation publishes a list price of US$151,995 for the Haas ST-40S (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-40s#price; the request is passed to Haas Automation or an authorised dealer.
Z travel and turning length. The ST-40S has 28 in (711 mm) of both; the ST-40 has 44 in (1,118 mm). Turning diameter, X travel, chuck size, bar capacity, spindle power, torque, speed and the 710 ipm (18 m/min) rapid are the same on the ST-40. Tailstock travel on the ST-40S is 26 in (660 mm).
The table lists tailstock figures for it: an MT5 taper, 26 in (660 mm) of travel, and thrust from 200 lbf (890 N) up to 3,000 lbf (13,345 N). With 28 in (711 mm) of turning length the tailstock is mostly for stabilising a heavy part in the chuck, not for long shafts.
40 hp (29.8 kW) and 1,400 ft-lbf (1,898 N·m) at 150 rpm, through a 2-speed gearbox, up to 2,400 rpm. The XP option rows give 55 hp (41 kW) and 2,100 ft-lbf (2,847 N·m) at 150 rpm, which is 50% more torque, with a full-load current of 105 A at 220 VAC or 53 A at 440 VAC.
20,400 lb (9,253 kg). The domestic pallet measures 216.5 × 94.5 × 116 in (550 × 240 × 295 cm) and the export crate 216.5 × 95 × 120 in (550 × 241 × 305 cm). These are shipping dimensions and should not be used as the installed size.
Yes, the ST-40SY keeps the 28 in (711 mm) turning length and adds ± 3 in (± 76 mm) of Y travel and live tools at 4,000 rpm. The Y axis takes some capacity in exchange: the ST-40SY turns 27.5 in (699 mm) in diameter and its X rapid is 472 ipm (12 m/min), against 30 in (762 mm) and 710 ipm (18 m/min) here.
