The Haas ST-40LY is a large, multi-purpose CNC turning center designed to tackle long part machining with high precision, rigidity, and versatility. The suffix “L” denotes extended Z-axis travel for long turning lengths, while “Y” indicates the addition of a Y-axis for off-center milling and drilling, expanding the machine’s capability beyond traditional turning. Built by Haas Automation — one of the most widely adopted CNC machine brands worldwide — the ST-40LY is engineered for demanding production environments where both heavy cutting and multi-feature machining are required.
The machine’s heavy cast iron base and precision box-way guideways provide outstanding rigidity and thermal stability, minimizing deflection and vibration under load. This makes the ST-40LY especially suited for industries such as automotive, aerospace, energy, oil & gas, and heavy equipment manufacturing, where long shafts, housings, and multi-feature parts are common. Its large envelope supports a variety of part sizes while maintaining accuracy and surface finish.
Featuring the intuitive Haas CNC control system, the ST-40LY simplifies programming with conversational routines, full G-code support, and extensive connectivity. Optional live tooling, probing systems, and automation interfaces allow manufacturers to streamline workflows, reduce setups, and improve throughput. Whether used for continuous production or complex job-shop work, the ST-40LY delivers a powerful combination of capacity, flexibility, and reliability.
HAAS ST40LYSPECIFICATIONS
TRAVEL & CAPACITY
Max Turning Diameter: ~914–965 mm (36–38 in)
Max Turning Length: ~1,372–1,829 mm (54–72 in)
Chuck Size: Typically 12″ or 15″
Max Bar Capacity: ~Ø127–Ø152 mm (5–6 in)
Y-Axis Travel: Typically ±100–150 mm
SPINDLE
Spindle Speed: ~2,500–3,000 rpm
Spindle Power: ~30–45 kW (40–60 hp)
Spindle Torque: High torque for heavy cuts
Drive Type: Direct/gear driven
TOOLING / TURRET
Turret Stations: ~12–20
Live Tooling: Optional
Tool Indexing: Servo driven
FEEDRATES
Rapid Traverse (X/Z/Y): ~20–30 m/min
Cutting Feedrate: Programmable
COOLANT & CHIP HANDLING
Flood Coolant: Standard
High-Pressure Coolant: Optional
Chip Conveyor: Optional
CONTROL SYSTEM
Haas CNC Control
Conversational & G-code programming
USB/Ethernet connectivity
POWER & AIR REQUIREMENTS
Electrical Power: ~30–50 kVA
Air Requirement: ~0.5 MPa (~75 psi)
HAAS ST-40LY – GENERAL INFORMATION
Model: Haas ST-40LY
Machine Type: CNC Turning Center with Y-Axis and Extended Travel
Purchasing a used Haas ST-40LY can deliver significant value for machine shops and manufacturers aiming to expand their turning and milling capabilities without the high cost associated with new equipment. With CNC machines, the steepest depreciation usually happens in the first few years, meaning that a well-maintained used ST-40LY can be acquired at a substantial discount yet still offer years of productive service. The machine’s robust mechanical build — heavy cast base, box-way slides, and high-torque spindle — ensures that even older units retain structural integrity and reliability when properly serviced.
Because Haas is one of the most widely adopted CNC brands globally, used ST-40LY units are relatively easy to source, and spare parts and service expertise remain widely available. Shops that already use Haas controls benefit further since operator familiarity, programming experience, and integration into existing workflows happen quickly, minimizing downtime during installation and ramp-up.
The Y-axis and optional live tooling extend the machine’s capability to handle off-center milling, drilling, and multi-surface operations without requiring separate machines or additional setups. This versatility boosts productivity and reduces part handling, fixturing, and cycle time. A used ST-40LY can also be paired with automation such as bar feeders and robotic loaders, enabling lights-out production and further improving ROI. For job shops and high-mix production environments, a used ST-40LY offers a strong combination of power, flexibility, and cost-effectiveness.
HOW MUCH DOES A USED HAAS ST40LYCOST?
The cost of a used Haas ST-40LY depends on several variables, including age, spindle hours, configuration, included accessories, and local market conditions. Because the ST-40LY is a larger, more capable machine with extended travel and Y-axis functionality, its used price typically sits above smaller turning centers. Older ST-40LY machines with higher hours and basic configurations (e.g., no live tooling or automation) are often available in the $50,000 to $90,000 USD range. These units can provide strong value for shops willing to refurbish or add tooling over time.
Used ST-40LY units that are mid-life — meaning good mechanical condition, moderate hours, and useful options such as chip conveyors, high-pressure coolant, and upgraded controls — commonly fall in the $90,000 to $140,000 USD bracket. These machines are often ready for production with minimal upfront investment and represent excellent value for expanding capacity quickly.
Low-hour or late-model ST-40LY machines equipped with live tooling, probing packages, automation accessories, and other productivity upgrades can reach $140,000 to $180,000+ USD, especially in regions with high demand for large turning centers. Market dynamics — including supply, geographical demand, and industry growth — influence these price ranges. Buyers should also factor in transport, rigging, installation, and tooling costs when planning total investment.
