SZGH-6150 Large CNC Lathe | Ø500 mm Swing | 1,600 mm Between Centers | A2-8 Spindle | 7.5 kW

What Is the SZGH-6150?

The SZGH-6150 is a flat-bed large CNC lathe designed for turning, facing, boring, and threading large shafts, discs, and flanges. It offers Ø500 mm swing over the bed, Ø250 mm swing over the cross slide, Ø75 mm spindle bore, and a step-less 1,800 rpm spindle driven by a 7.5 kW motor. Three bed lengths are available — 300 mm, 1,000 mm, and 1,600 mm between centers — making it configurable for short heavy flanges, medium shafts, and long cylindrical components. Standard equipment includes a SZGH CNC controller, 3-jaw 250 mm manual chuck, 4-station electric tool post, and manual tailstock with MT5 taper, all upgradeable to hydraulic, pneumatic, or 8-station turret options.

Technical Specifications

Turning Capacity

Spindle

Axis Travel & Feed

Tailstock

Machine Dimensions & Weight

Standard Accessories

Options & Upgrades

Key Features & Advantages

Flat-Bed Construction — Engineered for Large-Diameter, Heavy-Weight Workpieces

Unlike the slant-bed design of the SZGH-36 and 46 series (optimized for bar-feed production of smaller parts), the SZGH-6150 uses a horizontal flat-bed configuration. This is the correct architecture for large, heavy workpieces — shafts exceeding 200 mm diameter, flanges, pulleys, and large disc components — where the workpiece mass is too great for a slant-bed chuck to support reliably. The 400 mm wide flat bed provides a rigid, stable support surface for the cross slide under heavy interrupted cuts, and allows the tailstock to travel the full Z length for long-shaft between-center support.

Ø75 mm Spindle Bore + A2-8 Nose — Large Bar and Hollow Shaft Capability

The Ø75 mm spindle bore accommodates bar stock and hollow shaft blanks up to Ø75 mm in diameter, allowing through-bore turning without custom spider fixtures. The A2-8 spindle nose is a heavy industrial standard (larger than the A2-5 used on the 46-series slant-beds), designed to support 250 mm chuck and large faceplate loads without runout growth under cutting torque. For buyers turning hydraulic cylinder barrels, large valve bodies, or hollow drive shafts, the combination of Ø75 mm bore and A2-8 nose directly addresses the workpiece entry and clamping requirements of these parts.

Three Processing Length Configurations — 300 mm, 1,000 mm, 1,600 mm

The SZGH-6150 is available in three Z-axis travel configurations to match the longest workpiece in a buyer's production range:

• 300 mm (Z travel: 750 mm total): optimized for large-diameter short parts — flanges, pulleys, disc valves, pump bodies

• 1,000 mm (Z travel: 1,000 mm): covers medium shafts, spindles, and rollers up to approximately 900 mm turned length

• 1,600 mm (Z travel: 1,500 mm): suitable for long shafts, lead screws, and drive shafts requiring between-centers support with MT5 tailstock

Specify the processing length at order — the bed casting and Z-axis lead screw are length-specific and cannot be reconfigured in the field.

Super-Audio Quenched Guide Rails — Hardened Flat Bed for Long-Term Accuracy

The SZGH-6150's flat bed guide ways are hardened using super-audio frequency quenching (induction hardening), achieving surface hardness of HRC48–55 on the wear surfaces. This directly determines how long the machine maintains its stated X/Z positioning accuracy (0.02/0.025 mm) and repeatability (0.01/0.012 mm) under production conditions. Unhardened cast iron flat beds are standard on lower-cost large lathes; they wear significantly faster under the combined load of large-diameter interrupted cuts and long-travel shaft turning, with measurable accuracy degradation within 12–18 months of full-shift production. The quenched ways on the 6150 sustain specification over a substantially longer service life.

Step-Less Variable Speed Spindle — Optimal RPM for Every Diameter and Material

The 1,800 rpm step-less spindle allows the CNC program to set any spindle speed from near-zero to maximum — critical for large-diameter turning where surface speed (m/min) must remain constant as the cutting diameter decreases during facing. When turning a Ø500 mm disc face from the outside diameter to center at 80 m/min surface speed: at Ø500 mm the spindle runs at 51 rpm; at Ø50 mm it must accelerate to 510 rpm to maintain the same surface speed. A step-less spindle with G96 constant surface speed (CSS) programming handles this automatically — producing consistent finish across the full face without the tool-mark rings caused by fixed-step speed machines changing gears at discrete diameters.

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

The SZGH-6150 is one of the few machines in the SZGH product line with explicit catalog support for all five major CNC controller brands. This is significant for large-machine buyers, who typically have existing Fanuc or Siemens service contracts, in-house electricians certified on those systems, and established spare-parts procurement channels. Specifying Fanuc 0i-TF or Siemens 828D on the 6150 means local service engineers can diagnose and repair the controller without SZGH remote support — critical for production environments where a lathe downtime event affects an entire manufacturing cell.

4-Station Tool Post Standard + 6/8-Station Turret Optional — Configurable for Job Complexity

The standard 4-station electric tool post provides fast (under 3 seconds) indexed positioning for turning, facing, threading, and grooving operations. For programs requiring more than four tool types per part — common on complex flanges combining OD turning, ID boring, face grooving, threading, and chamfering — the optional 6 or 8-station electric turret expands the tooling capacity without manual tool changes. For buyers running mixed batches with varied tooling requirements, the 8-station turret effectively eliminates between-batch tool setup time.

Applications & Industries

The SZGH-6150 targets production environments where workpiece diameter or length exceeds the capacity of smaller slant-bed CNC lathes.

Industries & Typical Parts

SZGH-6150 vs. SZGH-6180 vs. Typical Imported Large CNC Lathe

Choose the SZGH-6150 if: workpieces are within Ø500 mm diameter and 1,600 mm length, the primary application is shaft and disc turning in the mid-heavy range, and full controller brand flexibility is needed.

Choose the SZGH-6180 if: workpieces exceed Ø500 mm (up to Ø800 mm) or require the 130 mm through-bore, 500 mm chuck, 11 kW motor, or 2,850 mm between-centers travel.

Consider imported alternatives if: production is 3-shift continuous on workpieces above 2,000 kg, or spindle torque requirements exceed 7.5 kW continuously.

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, guide rail quenching process, spindle design, and servo integration

• Guide rail hardness certification — super-audio quenched ways; surface hardness report supplied with machine

• Pre-shipment inspection — run-in cycle, spindle runout measurement, X/Z accuracy verification, and test report included

Frequently Asked Questions

Q1: What is the difference between the SZGH-6150 and the slant-bed lathes (SZGH-36/46 series)?

The slant-bed 36/46 series machines are designed for high-speed bar production of small-to-medium parts (Ø16–45 mm bar, Ø300–350 mm chuck) — they excel at batch turning of precision shafts, pins, and connectors at high spindle speeds (up to 4,000 rpm). The SZGH-6150 is a flat-bed large lathe designed for a fundamentally different class of work: large-diameter turning (up to Ø500 mm), heavy workpieces (flanges, cylinder bodies, gear blanks), and long shafts (up to 1,600 mm between centers). The flat-bed design is essential for the weight and size of these workpieces; slant-bed machines are not structurally appropriate for this category.

Q2: What spindle bore options are available, and which should I choose?

Three spindle bore configurations are available: (1) Ø52 mm with low-high two-step spindle speed; (2) Ø80 mm with two-step speed; (3) independent spindle with variable (step-less) speed. The Ø75 mm bore listed in the standard specification represents the catalog standard. The Ø52 mm option suits buyers whose largest bar or hollow shaft blank is below Ø52 mm — it provides more spindle rigidity at the smaller bore. The Ø80 mm option suits buyers needing to pass larger hollow billets or tube stock through the spindle. The step-less independent spindle is the recommended choice for general-purpose large-part production, as it enables G96 constant surface speed programming for clean face finishes across varying diameters.

Q3: Which processing length configuration should I choose — 300 mm, 1,000 mm, or 1,600 mm?

Choose based on your longest workpiece. The 300 mm version suits shops primarily turning large-diameter short parts: flanges, discs, pulley hubs, valve bodies — where the turning diameter matters more than length. The 1,000 mm version covers medium shafts, rollers, and spindles up to approximately 900 mm turned length. The 1,600 mm version is for long shafts, lead screws, drive shafts, and hydraulic cylinder rods requiring between-centers tailstock support. Note that processing length is a bed-casting specification — it cannot be changed after manufacture, so select the length that covers your maximum workpiece with reasonable margin.

Q4: Can the SZGH-6150 be ordered with a Fanuc or Siemens controller?

Yes. Unlike some SZGH models where the controller is SZGH-only, the 6150 explicitly supports Fanuc, Siemens, Syntec, and Mitsubishi as catalog options. Specifying controller at order affects wiring harness, operator panel layout, and firmware — it cannot be changed after factory assembly without significant rework. Fanuc 0i-TF and Siemens 828D are the most commonly specified alternatives for export orders, as these controllers have the widest global service network.

Q5: What chuck options are available, and when should I choose hydraulic over manual?

Standard is a 3-jaw manual chuck, Ø250 mm. Optional upgrades include: hydraulic chuck, pneumatic chuck, and 4-jaw independent chuck. Hydraulic chuck is recommended for: production runs where consistent clamping force across many cycles is critical (manual tightening varies by operator), workpieces requiring fast chuck operation to minimize cycle time, and any application where the machine may run semi-attended. The 4-jaw independent chuck is the correct choice for non-round, eccentric, or irregularly shaped blanks that cannot be centered in a 3-jaw. Note that hydraulic and pneumatic chucks require additional hydraulic/pneumatic supply units and are priced separately.

Q6: What is the purpose of the MT5 tailstock, and when is it used?

The MT5 Morse taper tailstock accepts MT5 dead centers, live centers, drill chucks, and Morse-to-other-taper adapters. It is used in three main scenarios: (1) between-centers turning of long shafts — the center supports the free end of the shaft to prevent workpiece deflection under cutting forces; (2) drilling on the lathe centerline using tailstock-mounted drill chucks for hole diameters up to approximately Ø40–50 mm; (3) reaming and boring on centerline using tailstock-mounted boring tools. The 150 mm tailstock sleeve travel accommodates gradual feed-in for drilling and reaming operations without repositioning the tailstock body.

Q7: What is the difference between the 4-station tool post and the 6/8-station electric turret option?

The standard 4-station electric tool post holds four external tools (turning, facing, threading, grooving) and indexes under NC control. The optional 6-station and 8-station electric turrets add more tooling positions — critical for complex parts requiring both OD and ID tooling (boring bars, internal threading tools) in the same program, or mixed batch production where different parts use different tool sets. The 8-station turret also typically provides faster index time and better repeatability (±0.005 mm tool repeat position) compared to a 4-station post. For shops running parts with 5+ distinct operations, the turret upgrade eliminates manual tool changes mid-program.

Q8: What accuracy can I expect in production, and how does the quenched guide rail affect this?

The stated X/Z positioning accuracy is 0.02/0.025 mm and repeatability is 0.01/0.012 mm. The super-audio quenched guide rails (hardness HRC48–55) are essential to sustaining these values over the machine's production life. Flat-bed lathes with unhardened guide ways begin to show measurable accuracy degradation (0.03–0.05 mm drift over the Z travel) within 12–18 months of full-production use due to abrasive wear between the carriage and bed. Quenched ways reduce this wear rate by a factor of 3–5×, meaning the 6150's stated accuracy is maintained over substantially longer production life before re-scraping or re-grinding becomes necessary.

Q9: What is the lead time, warranty, and after-sales support for the SZGH-6150?

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

Export Markets & Customer References

SZGH-6150 machines are operating in production facilities across:

Typical buyer profile: Heavy industry sub-contractors turning shafts, flanges, and cylinder bodies for oil & gas, power generation, and hydraulic equipment; general engineering workshops upgrading from manual engine lathes to CNC for medium-volume shaft production; repair shops turning large wear-damaged components back to specification.

Request a Quote

Email: export02@szghtech.com

WhatsApp: +8618925223781

Website: szghtech.com

When enquiring, please provide: (1) required processing length — 300 mm, 1,000 mm, or 1,600 mm; (2) max. workpiece diameter and weight; (3) workpiece material; (4) preferred CNC controller (SZGH / Fanuc / Siemens / Syntec / Mitsubishi); (5) chuck type required (manual / hydraulic / pneumatic / 4-jaw); (6) tool post/turret preference (4-station / 6-station / 8-station); and (7) destination country. This allows SZGH to configure the correct bed length, controller, and tooling options for an accurate CIF quotation.

Lead time: 20–35 working days from deposit

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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