The Haas ST-45SY is a large-frame, multi-axis CNC turning center engineered for shops that need powerful turning, milling, and sub-spindle functionality all in one platform. As part of Haas Automation’s ST Series — one of the most widely deployed lineups of CNC lathes globally — the ST-45SY blends strength, rigidity, and advanced motion capability. The “S” denotes the inclusion of a sub-spindle for back-side work, while the “Y” denotes a Y-axis milling capability for off-center drilling, cross-hole machining, and multi-surface milling without secondary setups.
Mechanically, the ST-45SY features a robust cast iron base and precision box-way guides that deliver excellent rigidity and resistance to vibration during heavy cutting. Its high-torque spindle and extended travel envelope support large parts, deep cuts, and high material removal rates. This combination of turning and milling capability allows manufacturers to complete complex components — shafts with milled flats, precision fittings with cross holes, housings with drilled features — in a single setup, saving time, reducing fixturing needs, and improving accuracy.
The Haas CNC control system provides intuitive conversational programming, full G-code compatibility, Ethernet/USB connectivity, and support for probing and automation. Whether deployed in aerospace, automotive, energy, oil & gas, or general engineering environments, the ST-45SY brings multi-operation flexibility, high throughput, and production-ready capability to demanding manufacturing workflows.
HAAS ST45SYSPECIFICATIONS
TRAVEL & CAPACITY
Max Turning Diameter: ~1,016–1,067 mm (40–42 in)
Max Turning Length: ~1,220–1,829 mm (48–72 in)
Chuck Size: Typically 12″ or 15″
Max Bar Capacity: ~Ø152–Ø203 mm (6–8 in)
Y-Axis Travel: ~±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-45SY – GENERAL INFORMATION
Model: Haas ST-45SY
Machine Type: CNC Turning Center with Sub-Spindle & Y-Axis
Purchasing a used Haas ST-45SY can offer outstanding value for manufacturing organizations looking to expand their multi-axis machining capabilities without the high upfront cost associated with new large CNC lathes. Because CNC machines typically experience the most depreciation in their first few years of service, well-maintained used units are often available at significantly reduced prices while still offering many years of productive life. The ST-45SY’s combination of turning, Y-axis milling, and sub-spindle work capability provides flexible multi-operation machining in a single machine — functionality that might otherwise require multiple dedicated machines.
One compelling advantage of buying used is Haas Automation’s extensive global support network, which makes parts, service expertise, and technical documentation easy to access. Operator familiarity with Haas controls is also widespread, reducing training time and easing integration into existing production lines. Many used ST-45SY units also come with optional accessories like chip conveyors, high-pressure coolant systems, probing packages, and automation interfaces, which further boost value and return on investment.
In addition to its strong machine base, the ST-45SY’s multi-axis capabilities reduce fixturing, increase accuracy, and streamline cycle execution, making it highly suitable for job shops, precision contract manufacturers, and high-mix production environments. Pairing a used ST-45SY with bar feeders or robotic automation can help enable lights-out machining, increase throughput, and lower labor costs, making it a strategic choice for growing operations.
HOW MUCH DOES A USED HAAS ST45SYCOST?
The price of a used Haas ST-45SY varies based on machine age, hours, configuration, condition, and included options, but there are recognizable market ranges to guide budgeting. Because the ST-45SY combines sub-spindle and Y-axis milling capability with a large machine frame, its used units generally command higher prices than simpler fixed-axis lathes. Older used machines — higher hours and basic setups — commonly appear in the $70,000 to $110,000 USD range. These units may require some servicing or upgrades but still deliver substantial multi-operation capability.
Mid-range used ST-45SY machines — typically under 10–12 years old and with moderate spindle hours, clean mechanical condition, and useful options like chip conveyors, high-pressure coolant, or Haas Next Gen control — commonly list between $110,000 and $160,000 USD. These machines are often ready for immediate production and provide excellent value for shops looking to increase capacity quickly.
Late-model or low-hour units equipped with additional productivity upgrades — such as live tooling, probing packages, bar feeders, robotic integration, or automation stacks — can command $160,000 to $220,000+ USD in markets with strong manufacturing demand. Regional variations also affect pricing, with North America and Western Europe typically seeing higher used values due to strong industrial activity. Buyers should account for transportation, rigging, installation, and tooling costs when assessing the total investment required.
