USED HAAS ST35 – 2022
The HAAS ST35 – 2022 is a mid-size CNC turning center designed for manufacturers that need a combination of large-diameter turning capacity, high spindle power, substantial bar capacity, and reliable production performance. As part of the Haas ST Series, the ST35 is designed around a rigid turning platform with a 12-inch chuck, 4-inch bar capacity, 40 HP spindle, and 3,200 RPM maximum spindle speed. It provides a substantial work envelope while maintaining a footprint suitable for many general-purpose machining departments.
The ST35 is particularly well suited for manufacturers producing shafts, bushings, flanges, hydraulic components, fittings, sleeves, housings, and other cylindrical parts. Its A2-8 spindle nose and 4-inch spindle bore provide the capacity needed for relatively large-diameter bar stock, while the 12-inch chuck provides substantial workholding capability. Haas lists a maximum part swing of 21 inches and a maximum cutting diameter of 15 inches with the standard bolt-on tooling configuration.
The machine’s 40 HP spindle provides substantial cutting power for production turning and heavy roughing operations. The standard spindle is rated at 3,200 RPM and produces up to 425 ft-lb of torque at 325 RPM. An optional gearbox configuration can provide considerably higher low-speed torque, making the machine useful for applications where aggressive material removal and heavy turning cuts are required.
The ST35 provides approximately 9.4 inches of X-axis travel and 32.5 inches of Z-axis travel, giving it a useful turning envelope for medium and larger components. Rapid traverse is approximately 945 IPM on both X and Z, helping reduce non-cutting time between operations. The machine can accommodate workpieces up to approximately 32.5 inches between centers, although actual cutting length depends on the workholding arrangement and selected options.
A standard 2022-era ST35 can be equipped with a 12-station bolt-on tool turret, while other turret configurations can be specified depending on the machine. BMT65 tooling and live tooling options can substantially expand the machine’s capabilities by allowing milling, drilling, tapping, and other driven-tool operations. This makes the exact turret configuration an important consideration when evaluating a used ST35.
For shops requiring additional automation, the ST35 platform can be equipped with options such as an automatic parts catcher, automatic door, chip conveyor, and sub-spindle. The optional A2-5 sub-spindle has a 6.5-inch hydraulic chuck and can synchronize with the main spindle for part handoff, allowing certain components to be machined on both sides without manual repositioning.
The Haas control platform also provides several features aimed at production environments. The ST35 platform includes a widescreen control, Ethernet connectivity, Wi-Fi, HaasConnect remote monitoring, HaasDrop wireless file transfer, Safe Run, rigid tapping, Advanced Tool Management, and standard program memory. These features can make a relatively recent 2022 machine easier to integrate into a modern CNC production environment.
The 4-inch bar capacity is one of the defining characteristics of the ST35. This allows the machine to process larger bar stock than smaller Haas turning centers such as the ST20 or ST30. For shops producing large bushings, shafts, hydraulic components, fittings, and other bar-fed parts, this larger spindle opening can reduce the need for multiple turning platforms.
The machine also uses a 55-gallon coolant tank and multi-stage coolant pump as standard equipment on the current ST35 specification. High-pressure coolant and belt-type chip conveyor systems are available options. These features can become particularly valuable when the machine is used for high-volume production or when machining materials that generate substantial quantities of chips.
A used HAAS ST35 – 2022 can therefore provide a strong combination of relatively modern CNC technology, large bar capacity, high spindle power, substantial turning diameter, and production automation. For manufacturers looking for a used CNC lathe that can handle both general turning and demanding production applications, the ST35 represents a versatile mid-size turning platform.
HAAS ST35 – AXIS
| Specification | Details |
|---|---|
| Machine Type | CNC Turning Center |
| Machine Configuration | 2-Axis Turning Center |
| X-Axis | Yes |
| Z-Axis | Yes |
| X-Axis Travel | 9.4 in / 239 mm |
| Z-Axis Travel | 32.5 in / 826 mm |
| Y-Axis | Not Standard on ST35; ST35Y Variant Available |
| C-Axis | Configuration Dependent |
| Live Tooling | Optional |
| Sub-Spindle | Optional |
| Main Spindle | Horizontal |
| Machine Category | Lathe |
| Primary Application | CNC Turning and Production Machining |
The standard ST35 is configured around X- and Z-axis turning. Haas also offers the ST35Y version with approximately ±2 inches of Y-axis travel, while C-axis, live tooling, and sub-spindle capabilities depend on the exact configuration.
HAAS ST35 – AXIS TRAVELS / WORK ENVELOPE
| Specification | Details |
|---|---|
| X-Axis Travel | 9.40 in / 239 mm |
| Z-Axis Travel | 32.50 in / 826 mm |
| Maximum Part Swing | 21.0 in / 533 mm |
| Maximum Cutting Diameter – BOT Turret | 15.00 in / 381 mm |
| Maximum Cutting Diameter – BMT65 Turret | 13.75 in / 349 mm |
| Maximum Cutting Length | 32.5 in / 826 mm |
| Maximum Between Centers | 32.5 in / 826 mm |
| X-Axis Rapid | 945 IPM / 24 m/min |
| Z-Axis Rapid | 945 IPM / 24 m/min |
| X-Axis Maximum Thrust | 4,100 lbf / 18,238 N |
| Z-Axis Maximum Thrust | 5,100 lbf / 22,686 N |
| Work Envelope | Medium-to-Large Turning Envelope |
The ST35’s approximately 21-inch maximum part swing and 15-inch maximum cutting diameter with the bolt-on turret give the machine substantial turning capacity for its class. With a BMT65 turret, maximum cutting diameter is approximately 13.75 inches.
The 32.5-inch Z-axis travel also gives the machine enough capacity for relatively long components. Actual usable cutting length depends on the chuck, tooling, tailstock, steady rest, and other workholding equipment installed on the machine.
HAAS ST35 – CAPACITY / WORKHOLDING
| Specification | Details |
|---|---|
| Standard Chuck Size | 12 in / 305 mm |
| Main Spindle Nose | A2-8 |
| Bar Capacity | 4.00 in / 102 mm |
| Maximum Part Swing | 21.0 in / 533 mm |
| Maximum Cutting Diameter – BOT | 15.00 in / 381 mm |
| Maximum Cutting Diameter – BMT65 | 13.75 in / 349 mm |
| Maximum Cutting Length | 32.5 in / 826 mm |
| Maximum Between Centers | 32.5 in / 826 mm |
| Standard Workholding | Hydraulic Chuck |
| Hydraulic Chuck | 12 in A2-8 |
| Tailstock | Configuration Dependent |
| Steady Rest | Optional / Configuration Dependent |
| Parts Catcher | Optional |
| Automatic Door | Optional |
| Sub-Spindle | Optional |
The 12-inch hydraulic chuck and A2-8 spindle nose provide substantial workholding capability. The 4-inch bar capacity is particularly useful when the production process starts from large-diameter bar stock rather than individual blanks.
For a used machine, the chuck should be inspected for jaw condition, hydraulic pressure, clamping consistency, runout, and wear. If a tailstock or steady rest is included, these components should also be tested during the machine inspection.
HAAS ST35 – SPINDLE
| Specification | Details |
|---|---|
| Spindle Type | Main Turning Spindle |
| Spindle Orientation | Horizontal |
| Spindle Nose | A2-8 |
| Spindle Bore | 4.62 in / 117.3 mm |
| Maximum Spindle Speed | 3,200 RPM |
| Standard Spindle Power | 40 HP / 29.8 kW |
| Maximum Torque | 425 ft-lb / 576 Nm at 325 RPM |
| Optional Gearbox Torque | 1,400 ft-lb / 1,898 Nm at 150 RPM |
| Drive System | Direct Speed, Belt Drive |
| Bar Capacity | 4.00 in / 102 mm |
| Spindle Orientation Accuracy | ±0.02° with required option |
| Main Chuck | 12 in |
| Heavy-Duty Turning | Yes |
| Production Turning | Yes |
The ST35’s 40 HP spindle is one of its key advantages. The 3,200 RPM maximum speed provides a useful balance between high-speed finishing and lower-speed heavy turning. The spindle can produce 425 ft-lb of torque at 325 RPM, while an optional gearbox can increase low-speed torque substantially.
The 4.62-inch spindle bore also provides substantial internal clearance ahead of the 4-inch maximum bar capacity. This makes the ST35 well suited for larger bar-fed production applications.
When purchasing a used 2022 machine, the spindle should be tested at multiple speeds. Buyers should listen for bearing noise, inspect vibration, check spindle temperature, verify orientation, and perform runout measurements where possible.
HAAS ST35 – TOOL CHANGER
| Specification | Details |
|---|---|
| Standard Turret | 12-Station Bolt-On |
| Standard Tooling | Bolt-On Tooling |
| Optional Turret | 12-Station BMT65 |
| Optional Turret | 24-Station BMT65 Half-Index |
| Optional Turret | 12-Station VDI |
| Live Tooling | Available with Applicable Turret |
| Number of Standard Tool Stations | 12 |
| Tool Selection | CNC Controlled |
| OD Turning Tools | Supported |
| ID Boring Tools | Supported |
| Drilling Tools | Supported with Applicable Turret |
| Tapping Tools | Supported with Applicable Turret |
| Milling Tools | Supported with Live Tooling |
| Driven Tools | Configuration Dependent |
The standard ST35 uses a 12-station bolt-on tool turret. Haas also lists BMT65 live-tooling configurations, including a 12-station BMT65 and 24-station BMT65 half-index configuration.
For used-machine buyers, the turret configuration can significantly affect the value of an ST35. A machine equipped with BMT65 live tooling and C-axis capability can perform operations that a basic bolt-on turret machine cannot.
The turret should be tested through repeated indexing cycles. Tool station positioning, hydraulic clamping, turret alignment, live-tool operation, and toolholder condition should all be inspected.
HAAS ST35 – CONTROL SYSTEM
| Specification | Details |
|---|---|
| CNC Control | Haas CNC Control |
| Display | Widescreen Monitor |
| Ethernet | Standard |
| Wi-Fi | Standard |
| HaasConnect | Standard |
| HaasDrop | Standard |
| Safe Run | Standard |
| Rigid Tapping | Standard |
| Advanced Tool Management | Standard |
| Standard Program Memory | 1 GB |
| Media Display | M-Code / M130 |
| Remote Monitoring | HaasConnect |
| Wireless File Transfer | HaasDrop |
| Power Surge Protection | Standard |
| Early Power-Failure Detection | Standard |
| Custom Macros | Option / Configuration Dependent |
| Expandable Memory | Option / Configuration Dependent |
| Remote Jog Handle | Available |
The Haas control on the ST35 platform includes several connectivity and production-management features. Haas lists Ethernet and Wi-Fi connectivity, HaasConnect remote monitoring, HaasDrop wireless file transfer, Safe Run, rigid tapping, Advanced Tool Management, and 1 GB of standard program memory.
For a 2022 used machine, the control is a significant advantage compared with older generations of CNC lathes. However, the exact installed options should be verified because advanced software and hardware packages may differ between individual machines.
HAAS ST35 – COOLANT / DUST / WATER MANAGEMENT
| Specification | Details |
|---|---|
| Coolant System | Standard |
| Coolant Tank Capacity | 55 gal / 208 L |
| Coolant Pump | Multi-Stage |
| Flood Coolant | Yes |
| High-Pressure Coolant | Optional |
| Chip Conveyor | Optional |
| Belt-Type Chip Conveyor | Available |
| Automatic Coolant Refill | Optional |
| Enclosure Exhaust | Optional |
| Coolant Filtration | Configuration Dependent |
| Through-Tool Coolant | Configuration Dependent |
| Mist Collection | Configuration Dependent |
| Chip Management | Yes |
| Coolant Management | Yes |
The ST35 uses a 55-gallon coolant tank and multi-stage coolant pump in the standard specification. Haas also lists high-pressure coolant, belt-type chip conveyor, enclosure exhaust, and automatic coolant refill among available options.
For high-production work, a chip conveyor can substantially reduce operator intervention by continuously removing chips from the enclosure. High-pressure coolant can also improve chip evacuation during drilling and machining operations.
HAAS ST35 – POWER REQUIREMENTS
| Specification | Details |
|---|---|
| Standard Spindle Power | 40 HP / 29.8 kW |
| Electrical Supply | 3-Phase |
| Low-Voltage Input | 220 VAC |
| Low-Voltage Full Load Current | 70 A |
| High-Voltage Input | 440 VAC with Applicable Transformer |
| High-Voltage Full Load Current | 35 A |
| Standard Frequency | Verify Machine Configuration |
| Internal Transformer | Optional for High Voltage |
| Drive System | Belt Drive |
| Coolant System | Electrically Powered |
| Chip Conveyor | Additional Electrical Load |
| High-Pressure Coolant | Additional Electrical Load |
| Spindle Chiller | Configuration Dependent |
Haas lists the standard ST35 electrical specification at 220 VAC three-phase, with a 70-amp full-load rating. An optional internal high-voltage transformer allows operation from higher-voltage supplies such as 380–480 VAC, subject to the machine’s configuration.
The actual machine nameplate should always be used when preparing electrical service for a used machine. Additional equipment such as chip conveyors, high-pressure coolant systems, or other accessories can affect total facility requirements.
HAAS ST35 – DIMENSIONS
| Specification | Details |
|---|---|
| Approximate Footprint Without Conveyor | 151 × 70 × 79 in |
| Approximate Metric Footprint | 3,835 × 1,778 × 2,007 mm |
| Shipping Length | 171 in |
| Shipping Depth | 90 in |
| Shipping Height | 92 in |
| Shipping Weight | Approximately 14,300 lb |
| Shipping Weight | Approximately 6,487 kg |
| Machine Type | Floor-Mounted CNC Turning Center |
| Installation | Industrial Rigging Required |
| Chip Conveyor | Adds to Overall Installation Footprint |
The current ST35 specification lists an approximate machine footprint of 151 × 70 × 79 inches without the conveyor and a shipping weight of approximately 14,300 pounds. The published shipping dimensions are approximately 171 × 90 × 92 inches.
A used machine should be measured in its actual configuration before transportation because accessories such as a chip conveyor, bar feeder, parts catcher, or automation equipment can substantially affect the space required.
HAAS ST35 – GENERAL INFORMATION
| Specification | Details |
|---|---|
| Manufacturer | Haas |
| Model | ST35 |
| Year | 2022 |
| Machine Type | CNC Turning Center |
| Machine Category | Lathe |
| Chuck Size | 12 in |
| Spindle Nose | A2-8 |
| Bar Capacity | 4.00 in |
| Maximum Part Swing | 21 in |
| Maximum Cutting Diameter – BOT | 15 in |
| Maximum Cutting Diameter – BMT65 | 13.75 in |
| Maximum Cutting Length | 32.5 in |
| X-Axis Travel | 9.4 in |
| Z-Axis Travel | 32.5 in |
| Spindle Power | 40 HP |
| Maximum Spindle Speed | 3,200 RPM |
| Spindle Bore | 4.62 in |
| Standard Turret | 12-Station Bolt-On |
| BMT65 Turret | Optional |
| Live Tooling | Optional |
| Y-Axis | Available on ST35Y Variant |
| Sub-Spindle | Optional |
| Parts Catcher | Optional |
| Coolant Capacity | 55 gal |
| Control | Haas CNC Control |
| Wi-Fi | Standard |
| Ethernet | Standard |
| HaasConnect | Standard |
| HaasDrop | Standard |
| Safe Run | Standard |
| Rigid Tapping | Standard |
INDUSTRIES THAT USE HAAS ST35
The automotive industry can use the HAAS ST35 for shafts, bushings, hubs, spacers, sleeves, brake components, drivetrain components, and other rotational parts. Its 4-inch bar capacity makes it particularly useful when components are produced directly from larger-diameter bar stock.
The oil and gas industry can use the ST35 for fittings, sleeves, couplings, valve components, adapters, and other cylindrical components. The machine’s 12-inch chuck, A2-8 spindle, and 4-inch bar capacity give it the capacity required for many medium-to-large oilfield components.
The hydraulic and pneumatic industry is another strong application. Hydraulic cylinders, gland components, valve bodies, sleeves, shafts, plugs, adapters, and fittings often require precise turning, boring, threading, and grooving operations that can be performed efficiently on an ST35.
The general industrial machinery industry uses CNC turning centers to produce shafts, rollers, bushings, pins, couplings, hubs, bearing components, and machine hardware. The ST35 provides enough spindle power and work envelope to accommodate many of these applications.
The aerospace industry can use the ST35 for appropriately sized precision shafts, bushings, sleeves, fittings, housings, and other rotational components. When equipped with appropriate probing, tooling, coolant, and inspection systems, the machine can support demanding production environments.
The energy industry can use the ST35 for components associated with pumps, generators, compressors, valves, and rotating equipment. The machine’s high spindle power is useful when machining steel and other engineering materials.
The contract machining and job-shop industry can benefit from the flexibility of the ST35. Shops can use the machine for both repeat production and lower-volume work, while the relatively modern Haas control simplifies programming, data transfer, setup, and production monitoring.
The construction equipment and heavy-equipment industries can use the ST35 for pins, bushings, shafts, spacers, hydraulic components, and other replacement or production parts. The machine’s large bar capacity and 40 HP spindle make it suitable for substantial turning work.
TYPICAL PARTS HAAS ST35 CAN PRODUCE
| Part Type | Typical Machining Operations |
|---|---|
| Shafts | Turning, Grooving, Threading |
| Bushings | OD/ID Turning, Boring |
| Sleeves | Turning, Boring, Grooving |
| Hydraulic Components | Turning, Boring, Threading |
| Hydraulic Fittings | Turning, Threading |
| Valve Components | Turning, Boring, Grooving |
| Oilfield Fittings | Turning, Threading |
| Couplings | Turning, Facing, Threading |
| Hubs | Turning, Facing, Boring |
| Rollers | Turning, Facing |
| Pins | Turning, Grooving |
| Spacers | Turning, Facing, Boring |
| Bearing Components | Turning, Grooving |
| Pump Components | Turning, Boring |
| Compressor Components | Turning, Threading |
| Adapters | Turning, Threading |
| Flanges | Facing, Turning, Drilling with Applicable Tooling |
| Machine Components | Turning, Boring |
| Aerospace Bushings | Precision Turning, Boring |
| Industrial Shafts | Roughing, Finishing, Threading |
WHY CHOOSE HAAS ST35
The first major reason to choose the HAAS ST35 is its combination of spindle power and workholding capacity. A 40 HP spindle, 12-inch chuck, A2-8 spindle nose, and 4-inch bar capacity give the machine a substantial production capability for a mid-size CNC lathe.
The 4-inch bar capacity makes the ST35 particularly attractive for manufacturers producing large rotational components from bar stock. It allows the machine to process material that may be too large for smaller turning centers.
The machine’s 21-inch maximum part swing provides additional flexibility when machining larger-diameter components. The 15-inch maximum cutting diameter with the bolt-on turret provides a substantial usable turning envelope.
The 40 HP spindle gives the ST35 enough power for demanding roughing operations. The optional high-torque gearbox can further increase low-speed torque for heavy turning applications.
The 32.5-inch Z-axis travel provides useful capacity for long components. This makes the machine suitable for shafts, sleeves, rollers, hydraulic components, and other parts where additional turning length is important.
Another advantage is the availability of BMT65 live tooling. A machine equipped with the appropriate turret and C-axis capability can perform additional machining operations without transferring the part to another machine.
The Haas control provides modern connectivity features such as Wi-Fi, Ethernet, HaasConnect, and HaasDrop. These features can make program transfer, remote monitoring, and production management easier than with older CNC equipment.
Finally, the ST35 offers a strong balance between capacity and footprint. It is considerably more capable than smaller turning centers while avoiding the size and infrastructure requirements of many very large CNC lathes.
WHY BUY USED HAAS ST35
A used HAAS ST35 – 2022 can provide manufacturers with relatively recent CNC turning technology without requiring the capital investment associated with purchasing a new machine.
The 2022 model year is particularly attractive to buyers who want a machine that is still relatively modern but may be available at a significant discount compared with new equipment.
The 40 HP spindle provides substantial cutting capability for a used machine in this class. Shops can use the ST35 for both general turning and heavier roughing operations.
The 4-inch bar capacity is another major reason to consider a used ST35. Shops that regularly work with larger bar stock can gain considerable productivity compared with machines limited to smaller spindle openings.
A used machine equipped with BMT65 live tooling, C-axis capability, parts catcher, chip conveyor, high-pressure coolant, or sub-spindle can provide substantially more production capability than a basic ST35. Buyers should therefore evaluate the complete option list rather than looking only at the model designation.
The optional sub-spindle can allow certain components to be machined on both sides in a single production cycle. Haas describes the sub-spindle as capable of synchronized part handoff and equipped with a 6.5-inch hydraulic chuck.
The machine’s modern Haas control features can also be valuable in a used-equipment purchase. Wi-Fi, Ethernet, HaasDrop, HaasConnect, Safe Run, and other functions can simplify integration into a current manufacturing environment.
However, even a 2022 machine should be inspected carefully before purchase. Buyers should review spindle hours, power-on hours, maintenance history, turret condition, chuck condition, hydraulic system, coolant system, axis accuracy, control alarms, and any included automation.
A live inspection is preferable. The machine should be powered up, warmed to operating temperature, cycled through all axes, run through turret indexing, operated at multiple spindle speeds, and ideally demonstrated under actual cutting conditions.
HOW MUCH DOES A USED HAAS ST35 COST?
The price of a used HAAS ST35 – 2022 can vary significantly depending on the machine’s configuration, hours, condition, options, tooling, and location.
A current Used CNC Exchange market reference places a used HAAS ST35 2022 in an approximate $80,000 to $125,000 USD range, while emphasizing that spindle hours, machine condition, turret configuration, live tooling, sub-spindle, chuck condition, coolant options, chip conveyor, maintenance history, and location can materially affect value.
That range should be treated as a general used-machine market indication rather than a fixed value for every 2022 ST35. A machine equipped with live tooling, C-axis, sub-spindle, high-pressure coolant, parts catcher, chip conveyor, automation, and low spindle hours can be worth considerably more than a basic configuration with high production hours.
For comparison, independent published asking-price records for the broader Haas ST35 model show observed asking prices from $49,500 to $75,000, but those records primarily represent older model years and should not be directly substituted for the value of a 2022 machine.
A 2022 ST35 should therefore be evaluated based on the exact machine rather than applying a generic model-year depreciation percentage.
| Value Factor | What Buyers Should Check |
|---|---|
| Model Year | 2022 |
| Machine Model | HAAS ST35 |
| Spindle Power | 40 HP |
| Spindle Speed | 3,200 RPM |
| Spindle Nose | A2-8 |
| Chuck | 12 in |
| Bar Capacity | 4 in |
| Turret | 12-Station or Optional BMT65 |
| Live Tooling | Verify |
| C-Axis | Verify |
| Y-Axis | Verify if ST35Y |
| Sub-Spindle | Verify |
| Parts Catcher | Verify |
| Chip Conveyor | Verify |
| High-Pressure Coolant | Verify |
| Coolant System | Inspect Pump and Tank |
| Spindle Hours | Verify |
| Power-On Hours | Verify |
| Turret Condition | Inspect |
| Chuck Condition | Inspect |
| Spindle Condition | Test at Multiple RPM |
| Axis Accuracy | Verify |
| Ballscrew Condition | Inspect |
| Hydraulic System | Test |
| Control | Test All Functions |
| HaasConnect | Verify |
| HaasDrop | Verify |
| Tooling | Confirm Included Tooling |
| Maintenance | Review Records |
| Location | Consider Rigging and Freight |
| Final Value | Based on Complete Configuration |
For a buyer comparing multiple used ST35 machines, the lowest asking price is not necessarily the best deal. A machine with low hours, good geometry, a healthy spindle, BMT65 live tooling, C-axis, sub-spindle, chip conveyor, parts catcher, and high-pressure coolant may provide considerably greater production value than a lower-priced basic machine.
The most important inspection areas include the spindle bearings, spindle taper, chuck runout, turret alignment, hydraulic pressure, X/Z-axis backlash, ballscrews, linear guides, tailstock if equipped, coolant system, chip conveyor, control electronics, and overall machine geometry.
A properly maintained HAAS ST35 – 2022 can offer a strong combination of modern CNC controls, large bar capacity, high spindle power, substantial turning capacity, and optional automation. For manufacturers looking for a used CNC lathe capable of handling demanding production work, it can be a highly versatile addition to a machining operation.
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