USED HAAS ST-55 – 2023
The HAAS ST-55 is a heavy-duty CNC turning center engineered for manufacturers that require large-part machining capacity, exceptional rigidity, and reliable production performance. Built by Haas Automation, one of the most recognized CNC machine tool manufacturers in North America, the ST-55 is designed to handle large diameters, long workpieces, and demanding cutting applications while maintaining excellent accuracy and productivity.
The 2023 HAAS ST-55 represents one of the latest generations of Haas large-frame turning centers and incorporates modern control technology, improved machine dynamics, enhanced operator usability, and robust spindle performance. Designed for shops machining oversized components, the ST-55 combines a powerful spindle, large chuck capacity, and heavy-duty construction to deliver consistent results across a wide range of industries.
One of the machine’s key advantages is its ability to process large and heavy workpieces while maintaining excellent surface finishes and dimensional accuracy. The machine features a substantial turning diameter, long Z-axis travel, and a rigid cast iron structure that minimizes vibration during aggressive roughing and finishing operations. This makes the ST-55 particularly effective for machining large shafts, rollers, flanges, valve bodies, energy components, and industrial equipment parts.
The machine is capable of machining carbon steel, alloy steel, stainless steel, aluminum, cast iron, brass, bronze, titanium, and specialty materials commonly found in energy, aerospace, defense, mining, and heavy equipment industries. Its high-torque spindle design allows operators to remove large amounts of material efficiently while maintaining precise control throughout the machining process.
The 2023 model benefits from the latest Haas CNC control system, providing intuitive programming, advanced networking capabilities, high-speed processing, and compatibility with modern automation solutions. Shops can integrate bar feeders, parts catchers, robotic systems, and other automation technologies to further improve productivity.
Industries including oil and gas, power generation, aerospace, defense, heavy equipment manufacturing, mining, industrial machinery, transportation, and contract machining frequently utilize machines like the ST-55 to produce large, high-value components. For manufacturers seeking a modern heavy-duty turning solution with proven reliability and strong production capability, the 2023 HAAS ST-55 remains one of the most attractive large-capacity CNC lathes available in the used machinery market.
HAAS ST-55 – AXIS
| Specification | Details |
|---|---|
| Machine Type | CNC Turning Center |
| Axis Configuration | 2-Axis Standard |
| X-Axis | CNC Controlled |
| Z-Axis | CNC Controlled |
| C-Axis Option | Available |
| Live Tooling Option | Available |
HAAS ST-55 – AXIS TRAVELS / WORK ENVELOPE
| Specification | Details |
|---|---|
| X-Axis Travel | Approx. 27″ |
| Z-Axis Travel | Approx. 80″ |
| Maximum Cutting Diameter | Approx. 30″ |
| Maximum Turning Length | Approx. 80″ |
| Swing Over Front Apron | Approx. 44″ |
| Swing Over Cross Slide | Approx. 25.5″ |
HAAS ST-55 – CAPACITY / TABLE
| Specification | Details |
|---|---|
| Chuck Size | 15″ – 18″ |
| Maximum Part Diameter | Approx. 30″ |
| Maximum Part Length | Approx. 80″ |
| Bar Capacity | Approx. 4.0″ |
| Maximum Part Weight | Approx. 6,500 lbs |
| Production Environment | Heavy-Duty Manufacturing |
HAAS ST-55 – SPINDLE
| Specification | Details |
|---|---|
| Maximum Spindle Speed | 1,400 RPM |
| Spindle Nose | A2-11 |
| Main Spindle Motor | 40 HP |
| Peak Spindle Power | 60 HP |
| Maximum Torque | High-Torque Configuration |
| Spindle Bore | Approx. 4.1″ |
HAAS ST-55 – TOOL CHANGER
| Specification | Details |
|---|---|
| Turret Type | BOT Turret |
| Tool Stations | 12 |
| Half Index Capability | Available |
| Live Tooling Compatibility | Optional |
| Tool Selection | Automatic |
| Heavy-Duty Tool Holding | Standard |
HAAS ST-55 – CONTROL SYSTEM
| Specification | Details |
|---|---|
| CNC Control | Haas Next Generation Control |
| Programming Format | G-Code |
| Ethernet Connectivity | Standard |
| USB Program Transfer | Standard |
| Remote Monitoring Capability | Available |
| High-Speed Processing | Yes |
HAAS ST-55 – COOLANT / DUST / WATER MANAGEMENT
| Specification | Details |
|---|---|
| Flood Coolant System | Standard |
| High Pressure Coolant | Optional |
| Coolant Tank | Large Capacity |
| Chip Conveyor | Available |
| Automatic Coolant Refill | Available |
| Mist Collection Compatibility | Yes |
HAAS ST-55 – POWER REQUIREMENTS
| Specification | Details |
|---|---|
| Voltage | 220V / 480V |
| Electrical Requirement | 3 Phase |
| Connected Load | Approx. 45 kVA |
| Air Requirement | Shop Air Required |
HAAS ST-55 – DIMENSIONS
| Specification | Details |
|---|---|
| Length | Approx. 240″ |
| Width | Approx. 95″ |
| Height | Approx. 90″ |
| Machine Weight | Approx. 21,000 lbs |
HAAS ST-55 – GENERAL INFORMATION
| Specification | Details |
|---|---|
| Manufacturer | Haas Automation |
| Model | ST-55 |
| Year | 2023 |
| Machine Category | CNC Turning Center |
| Country of Origin | USA |
| Primary Application | Large Part Turning |
| Production Type | Heavy-Duty Manufacturing |
INDUSTRIES THAT USE HAAS ST-55
The HAAS ST-55 is widely utilized by industries that manufacture large, heavy, and precision-machined components. Oil and gas companies frequently use the machine to produce valve bodies, pump components, drilling equipment parts, couplings, threaded connections, and pressure-control hardware. The machine’s high-torque spindle and large work envelope make it particularly suitable for these demanding applications.
Power generation manufacturers rely on the ST-55 for producing turbine shafts, bearing housings, rotor components, steam system parts, and large flanges. The machine’s rigidity and accuracy help maintain critical tolerances on high-value components used in energy production facilities.
Heavy equipment and mining manufacturers use the ST-55 to machine rollers, hydraulic cylinder components, drive shafts, hubs, bushings, and structural equipment parts. The machine’s ability to handle large workpieces allows manufacturers to improve efficiency while maintaining part quality.
Additional industries include aerospace, defense, transportation, marine manufacturing, industrial machinery, steel processing, construction equipment production, and contract machining. The versatility of the ST-55 enables shops to support a broad range of customer requirements while maximizing machine utilization.
TYPICAL PARTS HAAS ST-55 CAN PRODUCE
The HAAS ST-55 is designed to produce large and complex turned components across numerous industries. Common oil and gas applications include valve bodies, pump shafts, drilling collars, couplings, pressure-control components, and threaded connectors. The machine’s spindle power and rigidity allow these parts to be machined efficiently while maintaining precision.
Power generation applications include turbine shafts, bearing carriers, rotor components, generator hardware, steam system parts, and large flanges. The machine’s long turning length supports the production of oversized components frequently required in energy-related industries.
Heavy equipment manufacturers commonly produce hydraulic cylinder rods, rollers, drive shafts, wheel hubs, axle components, bushings, and structural machine parts. The machine’s large capacity allows shops to process heavy workpieces with confidence.
Additional applications include marine shafts, aerospace structural components, industrial rollers, transportation hardware, mining equipment parts, custom-engineered components, and contract manufacturing projects. Its ability to machine steel, stainless steel, cast iron, aluminum, titanium, and specialty alloys significantly expands its production capabilities.
WHY CHOOSE HAAS ST-55
The HAAS ST-55 offers manufacturers a combination of large-part capacity, heavy-duty construction, and proven reliability. One of its primary advantages is its ability to machine large and heavy workpieces while maintaining excellent accuracy and surface finish quality. The machine’s rigid cast iron construction minimizes vibration and provides stability during aggressive cutting operations.
The powerful spindle system delivers high torque at lower spindle speeds, making the machine especially effective for roughing large steel and alloy components. This capability allows manufacturers to remove material efficiently while maintaining consistent machining performance.
Another major benefit is the Haas Next Generation Control. The control system provides intuitive programming, user-friendly operation, advanced diagnostics, networking capability, and automation integration options. This helps reduce training requirements and improve overall productivity.
The machine also offers outstanding versatility. From energy and mining components to aerospace hardware and industrial equipment parts, the ST-55 can support a broad range of production requirements.
For manufacturers seeking a modern heavy-duty CNC turning center capable of handling large workpieces and demanding machining applications, the HAAS ST-55 remains an excellent choice.
WHY BUY USED HAAS ST-55
Purchasing a used HAAS ST-55 provides manufacturers with access to modern large-capacity CNC turning technology at a significantly lower investment than purchasing a new machine. Because the 2023 model incorporates many of Haas’s latest advancements, buyers can acquire advanced capabilities while reducing capital expenditures.
The ST-55 is known for durability, reliability, and ease of operation. Properly maintained machines continue delivering excellent production performance while offering lower ownership costs compared to many competing large-frame turning centers.
Many used ST-55 machines are available with valuable options such as high-pressure coolant systems, chip conveyors, tailstocks, live tooling packages, C-axis capability, parts handling systems, and automation interfaces. These features can significantly improve productivity and reduce future equipment investment requirements.
Another important advantage is availability. New heavy-duty CNC lathes may require extended lead times, while used machines can often be installed much more quickly. This allows manufacturers to increase production capacity and respond to customer demand without lengthy delays.
For companies seeking modern turning technology, large-part machining capability, and strong return on investment, a used HAAS ST-55 represents an excellent opportunity.
HOW MUCH DOES A USED HAAS ST-55 COST?
The value of a used HAAS ST-55 depends on machine condition, operating hours, maintenance history, installed options, tooling inventory, and overall market demand. Because the 2023 model is relatively new, machines with low operating hours and comprehensive service records typically command strong resale values.
Optional equipment such as live tooling, C-axis functionality, tailstocks, chip conveyors, high-pressure coolant systems, automation packages, and tooling inventories can significantly affect pricing. Buyers generally place higher value on machines that are fully equipped and ready for immediate production.
Demand for large-capacity CNC turning centers remains strong across oil and gas, energy, aerospace, defense, transportation, mining, and industrial manufacturing sectors. This sustained demand helps support healthy resale values for modern machines such as the HAAS ST-55.
In addition to the purchase price, buyers should consider transportation, rigging, installation, electrical requirements, tooling, and operator training expenses. These costs should be evaluated alongside the machine’s productivity benefits and long-term manufacturing potential.
Compared to purchasing a new heavy-duty CNC turning center, a used 2023 HAAS ST-55 can provide substantial savings while still delivering modern control technology, large-part machining capability, high spindle torque, and reliable production performance. For manufacturers seeking a proven large-frame turning platform, the HAAS ST-55 remains one of the strongest values available in the used CNC equipment market.
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