The Haas Automation ST-40SY 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-40SY: short-bed Y-axis lathe, 27.5 in (699 mm) turning diameter, 28 in length, ± 3 in Y travel, 4,000 rpm BMT75 live tools.
| 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 | 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) |
| Y-Axis Travel | ± 3 in (± 76 mm) |
| Z-Axis Travel | 28 in (711 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 | 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 |
| 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 | 217 × 95 × 116 in (551 × 241 × 295 cm) |
| Shipping Export Crate | 217 × 95.5 × 120.5 in (551 × 243 × 306 cm) |
| Machine Weight | 20,400 lb |
| Machine Weight Export Crate | 22,141 lb (10,043 kg) |
Haas Automation publishes a list price of US$217,995 for the Haas ST-40SY (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-40sy#price; the request is passed to Haas Automation or an authorised dealer.
Mill and drill off the spindle axis. The ST-40SY has ± 3 in (± 76 mm) of Y travel, a C axis with interpolated motion and positioning, and BMT75 live tools at 4,000 rpm. The ST-40S is listed without those and turns 30 in (762 mm) in diameter, where the ST-40SY turns 27.5 in (699 mm). Both turn 28 in (711 mm) long.
± 3 in (± 76 mm), at a 472 ipm (12 m/min) rapid and with 2,300 lbf (10,231 N) of maximum thrust. Set against a 27.5 in (699 mm) turning diameter that is a narrow band around the centreline, which is normal for a lathe Y axis: wider patterns are made by turning the C axis between features.
C axis: 49 rpm maximum, 5 hp (3.7 kW) maximum rating, 0.01° positioning, and a 21.5 in (546 mm) brake holding 450 ft-lbf (610 N·m). Live tooling: BMT75 at up to 4,000 rpm in a 12-station turret with a 2 s index time. Boring-bar rear clearance from the turret face is 4.5 in (114 mm).
Choose on part length. The ST-40LY turns 80 in (2,032 mm) long with a 320 ipm (8.1 m/min) Z rapid. The ST-40SY turns 28 in (711 mm) long with a 710 ipm (18 m/min) Z rapid. Y travel, turning diameter, live-tool speed and spindle rating are the same, so a shop making flanges and housings gains nothing from the longer bed.
The table gives a machine weight of 20,400 lb and 22,141 lb (10,043 kg) in the export crate. The domestic pallet is 217 × 95 × 116 in (551 × 241 × 295 cm) and the export crate 217 × 95.5 × 120.5 in (551 × 243 × 306 cm).
