SZGH-6180 Large CNC Lathe | Ø800 mm Swing | 2,850 mm Centers | 130 mm Bore | 11 kW | 20-Inch Hydraulic Chuck

What Is the SZGH-6180?

The SZGH-6180 is a flat-bed heavy-duty CNC lathe with Ø800 mm swing over bed, Ø450 mm swing over cross slide, 130 mm spindle through-bore, 2,850 mm between centers, and a 600 mm wide guideway. It is powered by an 11 kW main spindle motor with VF 4-step speed range (30–835 rpm), ships standard with a 130 mm through-hole spindle, 20-inch (Ø508 mm) hydraulic chuck, and 4-station electric tool post, and weighs 6,200 kg. The machine accepts Siemens, Fanuc, Syntec, and Mitsubishi controllers as alternatives to the standard SZGH system, and supports hydraulic/pneumatic tailstock and 6/8-station electric turret upgrades. It is the correct machine for any application where workpiece diameter, shaft length, or bore diameter exceeds the SZGH-6150's capacity.

Technical Specifications

Turning Capacity

Spindle

Axis Travel & Feed

Tailstock

Machine Dimensions & Weight

Standard Accessories

Options & Upgrades

Key Features & Advantages

Ø800 mm Swing — Largest Turning Diameter in the SZGH Lathe Range

At Ø800 mm swing over bed and Ø450 mm over the cross slide, the SZGH-6180 handles workpiece diameters that put it firmly in the heavy industrial lathe class. For context: Ø800 mm swing accommodates turning the outside diameter of components up to approximately Ø790 mm — large pipe flanges (Class 600–1500 ASME), pressure vessel end caps, turbine disc blanks, large pulley wheels, and marine propeller shaft flanges. The Ø450 mm over cross slide constrains the maximum diameter during X-axis traverse (passing the cross slide body), but this is the standard for flat-bed lathes in this swing class and accommodates most industrial disc and flange workpieces.

130 mm Spindle Through-Bore Standard — Ships Ready for Large Hollow Shaft and Tube Work

Unlike the SZGH-6150 (Ø75 mm bore standard), the SZGH-6180 ships with the 130 mm through-bore spindle as standard equipment — no upgrade required, no additional cost. The 130 mm bore accommodates: pipe and tube stock up to approximately Ø125 mm OD for through-bore turning without bar-end support; hollow drive shafts and axle tubes passed through the spindle for internal boring; and large-diameter collet-style clamping systems. For oil & gas valve body manufacturing, hydraulic cylinder barrel boring, and marine shaft work, the 130 mm bore is a baseline requirement — having it as standard (not a paid option) simplifies procurement and avoids post-delivery upgrade requests.

20-Inch Hydraulic Chuck Standard — Consistent Clamping at Heavy Scale

The SZGH-6180 includes a 20-inch (Ø508 mm) hydraulic chuck in the standard delivery package — again, not an option. Hydraulic chucks at this scale are essential because manual tightening of a large 3-jaw chuck on heavy workpieces (flanges weighing 50–200 kg) is physically difficult and produces inconsistent clamping force between operators. The hydraulic actuation provides: (1) consistent clamping pressure every cycle, independent of operator strength; (2) fast jaw actuation for efficient part changeover in production; (3) safe clamping force for large interrupted cuts without jaw creep. At the 6180's workpiece weight class, a hydraulic chuck is not a convenience — it is a safety and accuracy requirement.

11 kW Main Motor — Full Heavy Roughing Capability on Alloy Steel and Stainless

The 11 kW motor (47% more power than the 6150's 7.5 kW) is sized for the heavy roughing cuts that large workpiece turning demands. Turning a Ø600 mm alloy steel flange blank at 3–5 mm depth of cut and 0.4 mm/rev feed generates cutting forces that require sustained spindle torque — the 11 kW motor provides this without speed de-rating under load. The 4-step VF spindle speed range (30–835 rpm) is designed for the low-speed, high-torque characteristic of large-diameter turning: at Ø800 mm, a surface speed of 80 m/min requires only 32 rpm — well within the 30 rpm minimum, allowing constant-surface-speed facing from the outermost diameter through to the bore.

2,850 mm Between Centers + 3,000 mm Z Travel — Long Shaft Turning Without Between-Centers Compromise

The 2,850 mm between-centers distance accommodates shaft blanks up to approximately 2,750 mm turned length — covering most industrial drive shafts, pump shafts, conveyor roller shafts, and large lead screws. The MT6 tailstock quill (larger than the 6150's MT5, matching the heavier workpiece class) supports long shafts during between-centers turning, preventing workpiece sag deflection that would otherwise cause taper error along the turned length. For buyers turning shafts in the 1,500–2,500 mm range, the 6180's center distance eliminates the multi-setup repositioning that a shorter machine would require.

600 mm Wide Guideway — Structural Rigidity Foundation for Heavy Interrupted Cuts

The SZGH-6180's 600 mm wide flat bed guideway (versus 400 mm on the 6150) provides a substantially larger cross-sectional moment of inertia against the bending forces applied by heavy interrupted cuts on large castings and forgings. Cast iron and forged steel blanks in the Ø500–800 mm range frequently have surface irregularities, scale, and structural discontinuities that generate impact forces per cut — the 600 mm bed width distributes these forces over a larger bearing surface, reducing peak stress at the guideway-carriage contact zone and preserving guide rail accuracy over a longer production life.

Super-Audio Quenched Guideways — Production Accuracy Sustained Over Service Life

As on the SZGH-6150, the 6180's flat bed guide surfaces are induction-hardened (super-audio quenching) to HRC48–55. On a 6,200 kg machine producing heavy cuts across a 3,000 mm Z-travel, guideway wear accumulation has a proportionally larger effect on cylindricity error than on a smaller machine. The quenched surfaces maintain the machine's operating accuracy (parallel within specification) over a production life measured in years rather than months, reducing the frequency of costly bed re-scraping or re-grinding operations.

Full Controller Flexibility — Siemens, Fanuc, Syntec, Mitsubishi Available

Like the 6150, the SZGH-6180 supports all major CNC controller brands as catalog options. For heavy industrial buyers — oil & gas, power generation, marine — where machine downtime events can halt production lines and service contracts are negotiated at the plant level, the ability to specify Fanuc 0i-TF or Siemens 828D means maintenance is handled through established local service channels without airfreighting SZGH engineers. Specify at order time.

Applications & Industries

The SZGH-6180 is specified when workpiece diameter, bore size, shaft length, or cutting power requirements exceed the SZGH-6150's capacity.

Industries & Typical Parts

SZGH-6180 vs. SZGH-6150 vs. Comparable Heavy Lathe (Smtcl / Dalian)

Choose the SZGH-6180 if: workpieces exceed Ø500 mm diameter or 1,600 mm length, the 130 mm bore is needed as standard, or the 20-inch hydraulic chuck is required for production clamping at scale.

Choose the SZGH-6150 if: workpieces fit within Ø500 mm and 1,600 mm length — it is a lower-cost and lighter machine for the same flat-bed turning category.

Consider Smtcl/Dalian class if: swing exceeds Ø800 mm, between-centers distance beyond 3,000 mm is needed, or continuous 3-shift production on workpieces above 2,000 kg requires the heavier structural mass of a 10,000+ kg machine.

Certifications & Quality Assurance

• CE Certified — complies with EU Machinery Directive 2006/42/EC; full documentation for EU customs clearance

• ISO 9001:2015 — quality management system certified across design, manufacturing, and after-sales

• National High-Tech Enterprise — recognized by China's Ministry of Science and Technology since 2018

• 100+ patents — covering base geometry, guideway quenching, hydraulic chuck interface, and servo integration

• Guide rail hardness certification — super-audio quenched to HRC48–55; hardness test report supplied with machine

• Pre-shipment inspection — full run-in cycle, spindle runout measurement, X/Z travel accuracy verification, hydraulic chuck clamping pressure test, and test report included

Frequently Asked Questions

Q1: How does the SZGH-6180 differ from the SZGH-6150 — when should I choose one over the other?

The primary differences are scale: the 6180 offers Ø800 mm swing (vs. Ø500 mm), 130 mm spindle bore (vs. Ø75 mm), 20-inch hydraulic chuck as standard (vs. 250 mm manual chuck standard), 11 kW motor (vs. 7.5 kW), 2,850 mm between centers (vs. 1,600 mm max), and 6,200 kg machine weight (vs. 2,850 kg). Choose the 6180 when your workpieces require any of these larger parameters; choose the 6150 when Ø500 mm swing and 1,600 mm length cover your full part range.

Q2: The spindle speed range is listed as "VF 4 steps, 30–835 rpm" — is this sufficient for large-diameter turning?

Yes — it is specifically designed for it. Large-diameter turning at 80–100 m/min surface speed on Ø600–800 mm workpieces requires spindle speeds between 30 and 53 rpm. The 6180's 30 rpm minimum allows constant surface speed (G96 CSS) programming from the outermost diameter of a Ø800 mm disc to approximately Ø90 mm before the spindle hits its minimum mechanical speed limit. The upper end of 835 rpm covers small-diameter facing and boring operations at full surface speed. The 4-step VF (variable frequency) drive provides smooth speed control across the full range without step-change speed drops.

Q3: The 20-inch hydraulic chuck is listed as standard — does this mean I don't need to order it separately?

Correct. The SZGH-6180 standard delivery package explicitly includes the 130 mm spindle through-hole and 20-inch (Ø508 mm) hydraulic chuck. This is a meaningful difference from the SZGH-6150, where the hydraulic chuck is an optional upgrade at extra cost. The hydraulic chuck requires a hydraulic power unit — confirm with SZGH whether this is included in the standard package or priced separately for your order configuration.

Q4: Can the SZGH-6180 turn between centers on shafts up to 2,850 mm?

Yes. The 2,850 mm between-centers distance and MT6 tailstock (Ø100 mm quill diameter) are rated for between-center shaft turning up to approximately 2,750 mm effective turned length. For shafts in this length range, SZGH recommends a steady rest (lunette) for diameters below approximately Ø60 mm at mid-span to prevent workpiece deflection under cutting forces — confirm steady rest compatibility with SZGH sales when ordering for long thin-shaft applications.

Q5: What controller options are available, and does the choice affect delivery time?

Standard is the SZGH controller. Fanuc 0i-TF, Siemens 828D, Syntec, and Mitsubishi are available as alternatives. Controller choice affects wiring harness design, operator panel layout, and firmware configuration — it is specified at order and cannot be changed after factory assembly. Fanuc and Siemens configurations may extend lead time by 5–10 working days compared to the SZGH standard; confirm with SZGH sales at enquiry time.

Q6: What is the X-axis rapid traverse rate, and why is it slower than the Z-axis rate?

X-axis rapid traverse is 4 m/min; Z-axis is 6 m/min. On large flat-bed lathes, X-axis travel is mechanically shorter (400 mm) and the carriage moves a heavier cross-slide assembly perpendicular to the axis of the workpiece — higher rapid traverse rates in X would introduce positional overshoot risk on the short travel. Z-axis travel (3,000 mm) benefits from higher rapid traverse to minimize non-cutting air-cutting time during long-shaft programs. Both rates are appropriate for the 6180's workpiece class.

Q7: Is a steady rest (lunette) available, and when is it necessary?

A steady rest supports long, slender workpieces mid-span during between-center turning to prevent deflection. For the SZGH-6180 class of work, a steady rest is typically required when the workpiece L/D ratio (length-to-diameter) exceeds approximately 6:1 — for example, a Ø100 mm shaft at 600 mm length or longer. Contact SZGH sales to confirm steady rest availability and specification for the 6180 bed width (600 mm), as steady rest sizing is bed-width specific.

Q8: What foundation and floor requirements does the SZGH-6180 need?

The 6,200 kg machine requires a concrete foundation for accurate, stable operation. Recommended minimum: a reinforced concrete slab of 300 mm thickness at C30 grade, isolated from building vibration sources (compressors, presses) where possible. A foundation plan drawing is provided by SZGH with the order confirmation. Foundation anchor bolt installation and machine leveling (to within 0.02 mm/m across the bed) should be completed before the machine is powered on — SZGH provides the alignment procedure and foundation layout diagram.

Q9: What is the lead time, warranty, and after-sales support for the SZGH-6180?

Lead time is 20–35 working days from deposit confirmation (Fanuc/Siemens configurations may add 5–10 working days). Warranty covers 12 months on all mechanical and electrical components (consumables excluded). After-sales support is available via WhatsApp remote video 24/5. For Fanuc and Siemens controller issues in export markets, SZGH coordinates with the respective brand's local service network. Local SZGH agents operate in USA, Turkey, Romania, Russia, Egypt, Thailand, and Mexico.

Export Markets & Customer References

SZGH-6180 machines are operating in production facilities across:

Typical buyer profile: Oil & gas and power generation sub-contractors turning large valve bodies, pressure flanges, and turbine components; marine engineering workshops turning propeller shafts and rudder stocks; heavy equipment repair shops re-machining worn large-diameter components; general large-part turning shops serving mixed industrial clients.

Request a Quote

Email: export02@szghtech.com

WhatsApp: +8618925223781

Website: szghtech.com

When enquiring, please provide: (1) maximum workpiece diameter and weight; (2) maximum shaft length or between-centers requirement; (3) workpiece material and typical cutting conditions; (4) preferred CNC controller (SZGH / Fanuc / Siemens / Syntec / Mitsubishi); (5) additional tooling requirements (6/8-station turret, hydraulic tailstock); and (6) destination country. This allows SZGH to confirm the correct 6180 configuration and provide an accurate CIF quotation with foundation layout drawing.

Lead time: 20–35 working days from deposit (Fanuc/Siemens: add 5–10 days)

Warranty: 12 months on all mechanical and electrical components (consumables excluded)

After-sales support: Remote diagnostics via WhatsApp 24/5; local agents in USA, Turkey, Romania, Russia, Egypt, Thailand, and Mexico

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