USED HAAS ST40S

The Haas ST-40S is a large-frame CNC turning center designed to deliver reliable performance, precision, and versatility for medium-to-large production machining. Part of Haas Automation’s ST Series — one of the most widely adopted CNC lathe platforms in the world — the ST-40S combines a rugged machine structure with an intuitive control interface, making it suitable for both heavy cutting and fine finishing applications.

The “S” designation typically indicates a standard turning configuration without extended travel or Y-axis milling, offering a balance of size, rigidity, and cost-effectiveness. The ST-40S is engineered with a heavy cast iron base, precision box-way guideways, and a high-capacity spindle that provides excellent torque for deep cuts and long-part machining. Its robust mechanical design helps minimize vibration and ensures consistent accuracy over long production runs.

Haas’s CNC control system equips the ST-40S with conversational programming, full G-code capability, USB and Ethernet connectivity, and numerous productivity features such as tool offset memory, rigid tapping, and customizable macros. The machine’s work envelope is well suited for automotive shafts and housings, aerospace structural components, energy industry parts, and general heavy machining applications. Optional accessories such as coolant systems, chip conveyors, probing systems, and automation interfaces can further expand the ST-40S’s capability for lights-out manufacturing or mixed-mode production.

HAAS ST40S SPECIFICATIONS

WHY BUY USED HAAS ST40S

Purchasing a used Haas ST-40S can be a smart strategic investment for job shops and contract manufacturers seeking large-frame turning capability without the higher cost of a brand-new machine. CNC lathes like the ST-40S depreciate most heavily in their first few years, meaning that a well-maintained used unit can often be acquired at a fraction of its original price, yet still deliver reliable, heavy-duty performance. Because Haas machines are widely adopted worldwide, used ST-40S units are relatively abundant, and parts support, tooling, and service resources are easy to access.

One of the biggest advantages of choosing a used ST-40S is the strength of the Haas ecosystem: extensive service networks, spare parts availability, and a large pool of operators already familiar with Haas controls. This reduces training time and helps ensure that the machine can be integrated into production quickly. Even if the used machine does not include advanced accessories, many options (such as chip conveyors, high-pressure coolant, or probing systems) can be added later as needed.

A used ST-40S can also be paired with automation such as bar feeders, parts catchers, or robotic load/unload systems to increase throughput and reduce labor costs. For shops looking to expand capacity, reduce bottlenecks on large turning jobs, or add flexibility for mixed part runs without major capital expense, a used ST-40S often represents a high-value solution with a strong return on investment.

HOW MUCH DOES A USED HAAS ST40S COST?

The cost of a used Haas ST-40S varies based on age, configuration, spindle hours, included options, and regional market demand. As a large turning center, the ST-40S generally commands higher prices than smaller models but offers extended travel and torque capacity that justify the investment. Entry-level used units with higher hours and fewer options often start in the $40,000 to $80,000 USD range. These machines are usually solid candidates for shops willing to refurbish, upgrade, or pair the machine with new tooling and accessories.

Mid-range used ST-40S machines — typically under 10–12 years old with moderate spindle hours and useful options such as high-pressure coolant, chip conveyors, or service records — usually fall between about $80,000 and $120,000 USD. These machines often deliver immediate production readiness with minimal additional investment, making them attractive for expanding capacity quickly.

Low-hour, well-maintained, late-model ST-40S units with complete option packages — including live tooling, probing systems, and automation accessories — can command $120,000 to $160,000+ USD depending on condition and local demand. Factors such as maintenance history, spindle condition, and included tooling/fixtures also influence pricing. Buyers should always consider transport, rigging, installation, and tooling costs when calculating total investment to ensure true value and anticipated production output.