Haas ST-40
Image: haascnc.com, Haas Automation
Key Specifications
X Travel
Z Travel
Max Spindle
Rapid Traverse
Spindle Power
Max Turn Length
How much does the Haas ST-40 cost?
Manufacturer list price
As published by Haas Automation, verified 2026-10-02. Options, tooling, freight and installation are extra.
Overview
The Haas ST-40 is a large-frame two-axis lathe that turns 30 in (762 mm) in diameter and 44 in (1,118 mm) long, with a 15 in (381 mm) chuck and a 35.5 in (902 mm) swing. Its 40 hp (29.8 kW) spindle drives through a 2-speed gearbox and produces 1,400 ft-lbf (1,898 N·m) of torque at 150 rpm.
The gearbox is the point. Torque this high at 150 rpm is what holds a cut on a part near the full 30 in diameter, where the right surface speed arrives at very low rpm. The 2,400 rpm top speed then covers smaller diameters, and bar up to 4 in (102 mm) passes through the 4.62 in (117.3 mm) bore of the A2-8 spindle. For heavier work the table carries an XP option: 55 hp (41 kW) and 2,100 ft-lbf (2,847 N·m) at 150 rpm with the same 2,400 rpm limit, which is 50% more torque. It also raises the supply requirement from 70 A to 105 A at 220 VAC, or from 35 A to 53 A at 440 VAC.
X travel is 20 in (508 mm) and Z travel 44 in (1,118 mm), both with a 710 ipm (18 m/min) rapid. Thrust is 5,500 lbf (24,465 N) on X and 9,000 lbf (40,034 N) on Z, so Z has about 64% more push for drilling from the turret. The 12-station BOT turret takes any combination of OD and ID tools with 4.5 in (114 mm) of boring-bar clearance behind it; with a BMT75 turret the maximum turning diameter is 27.5 in (699 mm). The listed tailstock has an MT5 taper, 42 in (1,067 mm) of travel and thrust from 200 lbf (890 N) to 3,000 lbf (13,345 N).
Within the family, bed length is the choice. The ST-40S turns 28 in (711 mm) long and the ST-40L turns 80 in (2,032 mm), each with the same 30 in (762 mm) diameter and spindle figures as this machine.
Haas lists a starting price of US$175,995. In its export crate the machine weighs 21,740 lb (9,861 kg), and coolant capacity is 95 gal (360 L).
Full Specifications
| Parameter | Value |
|---|---|
| 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 | 44 in (1,118 mm) |
| Bar Capacity | 4 in (102 mm) |
| X-Axis Travel | 20 in (508 mm) |
| Z-Axis Travel | 44 in (1,118 mm) |
| Rapid Traverse Rate | 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 | 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-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 Service (low voltage) | 220 VAC 3-phase, 70 A |
| Electrical Service (high voltage) | 440 VAC 3-phase, 35 A |
| Shipping Domestic Pallet | 216.5 × 94.3 × 110 in (550 × 240 × 279 cm) |
| Shipping Export Pallet | 216.5 × 98 × 120 in (550 × 249 × 305 cm) |
| Machine Weight Export Crate | 21,740 lb (9,861 kg) |
Specifications sourced from haascnc.com — verified 2026-10-02
Strengths & Limitations
Strengths
- 1,400 ft-lbf (1,898 N·m) at 150 rpm through a 2-speed gearbox
- 30 in (762 mm) maximum turning diameter with 20 in (508 mm) of X travel
- XP option lifts the spindle to 55 hp (41 kW) and 2,100 ft-lbf (2,847 N·m) at 150 rpm
- 9,000 lbf (40,034 N) of Z thrust for large drills and heavy facing cuts
- MT5 tailstock with 42 in (1,067 mm) of travel and up to 3,000 lbf (13,345 N) of thrust
Limitations
- Bar capacity is 4 in (102 mm) through a 4.62 in (117.3 mm) bore, small for a machine that swings 35.5 in (902 mm)
- The 2,400 rpm maximum limits surface speed on small diameters
- Turning length is 44 in (1,118 mm); longer shafts need the ST-40L with 80 in (2,032 mm)
- The XP option needs 105 A at 220 VAC or 53 A at 440 VAC instead of 70 A or 35 A
Best For
Frequently Asked Questions
01
1,400 ft-lbf (1,898 N·m) at 150 rpm, from a 40 hp (29.8 kW) motor driving through a 2-speed gearbox. Maximum speed is 2,400 rpm. The spindle nose is A2-8 and the bore is 4.62 in (117.3 mm).
02
A higher-output spindle package listed in the table. It keeps the 2-speed gearbox and the 2,400 rpm maximum and raises the rating to 55 hp (41 kW) and 2,100 ft-lbf (2,847 N·m) at 150 rpm. Full-load current rises with it, to 105 A at 220 VAC or 53 A at 440 VAC, so the building supply has to be sized for the option, not for the base machine.
03
In bed length. The ST-40S turns 28 in (711 mm) long, the ST-40 turns 44 in (1,118 mm) and the ST-40L turns 80 in (2,032 mm). All three turn 30 in (762 mm) in diameter with a 15 in (381 mm) chuck, 40 hp (29.8 kW), 2,400 rpm and 1,400 ft-lbf (1,898 N·m) at 150 rpm. The ST-40L's Z rapid is 320 ipm (8.1 m/min), where the ST-40 and ST-40S rapid at 710 ipm (18 m/min).
04
The table lists an MT5 taper, 42 in (1,067 mm) of travel, and thrust ranging from a minimum of 200 lbf (890 N) to a maximum of 3,000 lbf (13,345 N). The low end of that range is useful for thin-walled or slender parts that a heavy push would distort.
05
Yes. The 12-station BOT turret in the table gives the full 30 in (762 mm) maximum turning diameter. The table also quotes 27.5 in (699 mm) as the maximum with a BMT75 turret. Rear clearance for boring bars is 4.5 in (114 mm).
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