Haas ST-40L
Key Specifications
Max Spindle
Spindle Taper
Tool Capacity
Spindle Power
max part swing
max cutting diameter
Overview
The Haas ST-40L is the long-bed variant of the ST-40 large-frame turning center, extending the Z-axis to 2,032 mm (80 in) for long shafts, pipe, and extended workpieces. It shares the same heavy castings, 29.8 kW (40 hp) spindle, and 381 mm (15 in) chuck as the standard ST-40 but adds the bed length needed for long-format turning.
The spindle drives through a 2-speed gearbox, producing 1,898 Nm (1,400 ft-lb) of torque at 150 RPM with a max speed of 2,400 RPM. An optional XP high-performance spindle bumps output to 41.0 kW (55 hp) and 2,847 Nm (2,100 ft-lb). The 117.3 mm (4.62 in) spindle bore handles bar stock up to 102 mm (4.0 in). The max cutting diameter is 762 mm (30 in) with the BOT turret.
The extended 2,032 mm (80 in) Z-axis travel opens up applications in shaft work, pipe threading, hydraulic cylinder manufacturing, and any turning operation where the standard 44-inch bed falls short. The MT5 tailstock with extended travel supports long workpieces, and steady rests are available for slender parts with high deflection risk.
The 12-station BOT turret is standard, with optional BMT75 turret available for shops that want live tooling capability. Without Y-axis, the ST-40L is a pure turning machine focused on long-format work with maximum rigidity and power.
At $200,000-$265,000 configured, the ST-40L targets shops that need large-frame long-bed turning capacity. It competes with the Doosan Puma 4100L and Mazak QT-400L in the long-bed large-frame segment. Popular in oil and gas, power generation, and heavy equipment manufacturing. Specs derived from Haas Automation published ST-40 data.
Full Specifications
| Parameter | Value |
|---|---|
| Max Part Swing | 35.5 in |
| Max Cutting Diameter | 27.50 in |
| Max Cutting Length | 80.0 in |
| Chuck Size | 15.0 in |
| Bar Capacity | 4.00 in |
| Spindle Nose | A2-8 |
| Spindle Bore | 4.62 in |
| Max Spindle Speed | 2,400 RPM |
| Spindle Motor Power | 40.0 hp |
| Spindle Torque | 1,898 Nm (1,400 ft-lb) @ 150 RPM |
| Spindle Drive | 2-Speed Gearbox |
| Xp Spindle Power | 41.0 kW (55 hp) |
| Xp Spindle Torque | 2,847 Nm (2,100 ft-lb) @ 150 RPM |
| X Axis Travel | 508 mm (20 in) |
| Z Axis Travel | 2,032 mm (80 in) |
| Rapid Traverse X | 18.0 m/min (710 ipm) |
| Rapid Traverse Z | 18.0 m/min (710 ipm) |
| Max Thrust X | 5500 lbf |
| Max Thrust Z | 9000 lbf |
| Tool Capacity | 12-Station BOT |
| Tailstock Taper | MT5 |
| Coolant Capacity | 95 gal |
| Machine Weight | 29900 lb |
| CNC Control | Haas Next Generation Control (NGC) |
| Capacities | S.A.E |
| Travels | S.A.E |
| X Axis | 20.00 in |
| Z Axis | 80.00 in |
| Feedrates | S.A.E |
| Rapids On X | 710 ipm |
| Rapids On Z | 320 ipm |
| Axis Motors | S.A.E |
| Spindle | S.A.E |
| Spindle Taper | A2-8 |
| Max Rating | 55.0 hp |
| Max Speed | 2400 rpm |
| Max Torque | 2100.0 ft-lbf @ 150 rpm |
| Xp Option | S.A.E |
| Drive System | 2-Speed Gearbox |
| Input Ac Voltage Low | 220 VAC |
| Full Load Amps Low | 70 A |
| Input Ac Voltage High | 440 VAC |
| Full Load Amps High | 35 A |
| Tailstock | S.A.E |
| Taper | MT5 |
| Travel | 84.5 in |
| Max Thrust | 3,000 lbf |
| Min Thrust | 200 lbf |
| Turret | S.A.E |
| Od Vs Id Tools | Any Combination (will vary with turret) |
| Boring Bar Rear Clearance | 4.37 in |
| General | S.A.E |
| Air Requirements | S.A.E |
| Air Required | 4 scfm @ 100 psi |
| Inline Air Hose | 3/8 in |
| Coupler | 3/8 in |
| Air Pressure Min | 80 psi |
| Electrical Specification | S.A.E |
| Dimensions Shipping | S.A.E |
| Domestic Pallet | 254.0 in x 95.0 in x 116.0 in |
| Export Crate | 254.0 in x 96.0 in x 120.5 in |
Specifications sourced from haascnc.com — verified 2026-03-28
Strengths & Limitations
Strengths
- 2,032 mm (80 in) Z-axis travel handles long shafts, pipe, and extended workpieces that the standard 44-inch bed cannot accommodate
- 40 hp spindle with 1,400 ft-lb of torque through a 2-speed gearbox for heavy roughing on long workpieces
- Optional XP spindle upgrade to 55 hp and 2,100 ft-lb for demanding material removal on large-diameter long parts
- Same proven ST-40 castings and 15-inch chuck for consistent performance across the extended bed
- At $200-265K, undercuts comparable long-bed large-frame lathes from Doosan, Okuma, and Mazak
- Optional BMT75 turret adds live tooling capability for cross-drilling and milling on long components
Limitations
- 2,400 RPM max spindle speed limits surface speed on smaller-diameter aluminum finishing work
- No Y-axis in the base ST-40L configuration — the ST-40LY adds Y-axis at additional cost
- Machine weight of 11,340 kg requires heavy-duty floor preparation and professional rigging
- Extended bed length creates a very large footprint requiring significant shop floor space
Best For
Frequently Asked Questions
01
Base price starts around $200,000. Configured with tailstock, XP spindle, chip conveyor, high-pressure coolant, and steady rests, expect $235,000-$265,000. The long-bed premium over the standard ST-40 is approximately $25,000-$30,000.
02
The ST-40L extends Z-axis travel from 1,118 mm (44 in) to 2,032 mm (80 in). Spindle, chuck, and cross-slide specs are identical. The longer bed adds weight, footprint, and a price premium. Choose the L variant when your parts regularly exceed 44 inches in length.
03
If your long parts are pure turning operations, the ST-40L is more cost-effective. If your long parts also need cross-drilled holes, milled flats, keyways, or bolt patterns, the ST-40LY adds Y-axis and live tooling to handle those features in the same setup.
04
For long, slender parts with high length-to-diameter ratios (typically greater than 5:1), steady rests are strongly recommended. The tailstock provides end support, but mid-span support prevents deflection and chatter on long traverses. Plan your tooling layout to accommodate steady rest positioning.
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