The Haas Automation ST-40LY 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-40LY: 80 in (2,032 mm) Y-axis lathe, ± 3 in Y travel, 27.5 in turning diameter, BMT75 live tools at 4,000 rpm, 1,400 ft-lbf 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 | 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 | 80 in (2,032 mm) |
| Bar Capacity | 4 in (102 mm) |
| X-Axis Travel | 20 in (508 mm) |
| Y-Axis Travel | ± 3 in (± 76 mm) |
| Z-Axis Travel | 80 in (2,032 mm) |
| Rapid Traverse X | 472 ipm (12 m/min) |
| Rapid Traverse Y | 472 ipm (12 m/min) |
| Rapid Traverse Z | 320 ipm (8.1 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 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 Speed | 49 rpm |
| C Axis Max Rating | 5 hp (3.7 kW) |
| 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 | 84.5 in (2,145 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 |
Haas Automation publishes a list price of US$292,995 for the Haas ST-40LY (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-40ly#price; the request is passed to Haas Automation or an authorised dealer.
A Y axis with ± 3 in (± 76 mm) of travel, an interpolating C axis and BMT75 live tools at 4,000 rpm. The ST-40L is a two-axis machine that turns 30 in (762 mm) in diameter with a 710 ipm (18 m/min) X rapid. The ST-40LY turns 27.5 in (699 mm) and its X rapid is 472 ipm (12 m/min). Turning length, chuck, bar capacity and spindle rating are the same.
Haas lists its control type as interpolated motion and positioning, with 0.01° positioning, a 49 rpm maximum and a 5 hp (3.7 kW) rating. The brake is 21.5 in (546 mm) in diameter and holds 450 ft-lbf (610 N·m). On a part near 27.5 in (699 mm) across, a cutting force at the rim has a long lever arm, so check the holding torque against the cut before milling far from center with the spindle clamped.
BMT75 live tooling at up to 4,000 rpm, in a 12-station turret that indexes in 2 s. The turret takes any combination of OD and ID tools, varying with the turret, and boring-bar rear clearance is 4.5 in (114 mm) from the turret face. The live tools run faster than the 2,400 rpm main spindle.
Yes. The ST-40SY has the same ± 3 in (± 76 mm) Y travel, 27.5 in (699 mm) turning diameter and 4,000 rpm live tools with 28 in (711 mm) of turning length, and its Z rapid is 710 ipm (18 m/min). The ST-40LY's 80 in (2,032 mm) is for shaft-type parts; short, wide parts do not need it.
An MT5 tailstock with 84.5 in (2,145 mm) of travel. Thrust ranges from 200 lbf (890 N) to 3,000 lbf (13,345 N). Being able to mill and drill with the tailstock engaged is much of the value of a Y axis on a bed this long.
