What coil processing equipment does Wuxi Jianfa manufacture?

We manufacture complete coil processing lines: slitting lines (rotary shear lines), cut to length lines, flying shear production lines, leveling machines, straightening machines and galvanizing production lines. Equipment can be supplied as a complete line or as individual machines to upgrade an existing line.

Which materials can your slitting and cut to length lines process?

Our lines process hot-rolled, cold-rolled, galvanized, stainless steel and aluminum coils, including high-strength grades. Each line is configured around your thickness range, coil width, yield strength and surface-quality requirements.

How do I choose between a slitting line, a cut to length line and a flying shear line?

Choose a slitting line when you need narrow strips recoiled for tube mills, roll forming or stamping. Choose a cut to length line when you need flat, stacked sheets or plates. Choose a flying shear line when you need high-volume sheet output, because the shear cuts while the strip keeps moving. Combined slitting and cut to length lines are also available.

What information should I send to receive an accurate technical proposal?

Please share the material grade and yield strength, coil thickness and width range, maximum coil weight and inner/outer diameter, required output (strip widths and count, or sheet length range), tolerance and flatness requirements, target line speed and the power supply at your plant.

Do you support installation, commissioning and operator training overseas?

Yes. Our after-sales team supports installation, commissioning and operator training, and continues with remote technical support and spare parts supply after start-up.

Can I visit the factory and inspect my equipment before delivery?

Yes. Buyers are welcome to visit our 40,000 m² facility in Wuxi, Jiangsu, within easy reach of Shanghai by high-speed rail, to review production and inspect their equipment before delivery.

High-Quality Cr Slitting Machine Manufacturer & Supplier

Industrial Core Fleet

High-Precision Coil Slitting & Processing Machinery

Engineered for minimal edge burr, zero coil camber distortion, and superior tension recoiling across ultra-thin cold-rolled, electrical silicon, and high-strength galvanized alloys.

Multi-Roll Precision High Strength Leveling Machine for steel plate

High Strength Leveling Machine

Engineered for high-yield tensile alloy strips, eradicating internal stress, edge waves, and cross bow defects prior to high-speed slitting.

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Stress Relieved Professional Straightening Machine for metal sheet

Professional Straightening Machine

Precision calibrated roller configuration achieving superior flatness standards demanded by EV motor lamination and white-goods manufacturing.

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Non-Stop Shearing Hot Rolled Plate Moving Shear Line

Hot Rolled Plate Moving Shear Line

Continuous dynamic synchronicity cutter heads enabling non-stop blank sizing for heavy industrial coil stocks at line speeds up to 80m/min.

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Surface Protection Stainless Steel Coil Uncoiling-Leveling-Shearing-Stacking Line

Stainless Steel Coil Processing Line

Specialized polyurethane-coated pinch rolls and paper interleaving units preventing microscopic scratches on 2B/BA cold-rolled stainless surfaces.

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Dual Integrated Hot-Rolled Coil Uncoiling-Slitting-Leveling-Cut-To-Length-Stacking Production Line

Combined Slitting & CTL Production Line

Multi-stage hybrid platform featuring rotary slitting knives and automated guillotine cut-to-length indexing for maximum plant floor economy.

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High Throughput Hot rolled sheet uncoiling slitting and recoiling production line

Heavy-Duty Sheet Slitting & Recoiling Line

Massive 4-column slitter head framework handling wide-master mother coils with hydraulic push-off cars and high-torque scrap balers.

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High Rigid Arbors HR uncoiling slitting recoiling line

HR Uncoiling-Slitting-Recoiling Line

Precision structural build accommodating tube mill feeding coils, structural ERW profiles, and high-frequency welded section mother strips.

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High Velocity Stacking Hot Rolled Sheet Uncoiling-Leveling-Shearing-Stacking Production Line

Uncoiling-Leveling-Shearing Line

Automated electromagnetic and air-float stacking table configuration for delicate sheets, eliminating drop-impact marks on plate surfaces.

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Technical White Paper

Precision Engineering Dynamics of Cold-Rolled (CR) Slitting

Why modern Cold Rolled coil processing demands zero-tolerance mechanical rigidity, dynamic arbor vibration dampening, and micrometer-scale blade clearance calibration.

Arbor Deflection Mitigation (≤0.005mm)

Cold-rolled strips (0.15mm – 3.0mm) exhibit work-hardening properties requiring massive radial shear resistance. Jianfa implements forged 42CrMo alloy arbor shafts, heat-treated and cryogenic tempered, holding runout tolerances below 0.005mm to eliminate slit width variation.

Burr Ratio Control ≤ 3% Strip Thickness

Improper knife clearance causes excessive plastic tearing, leading to rapid blade wear and heavy secondary deburring costs. Our high-precision CNC shimless tooling systems ensure clean cut surfaces with micro-burr boundaries under 3% of total stock thickness.

Constant Tension Differential Recoiling

Due to gauge variation across the mother coil crown, mult-slit strands wrap at differing diameters. Jianfa incorporates pneumatic roll-tensioning pads combined with eddy-current dynamic braking to guarantee drum tightness without coil inter-lap slippage.

“In high-speed cold-rolled processing lines exceeding 180 m/min, metallurgical integrity is determined not solely by cutter hardness, but by how the entire line manages residual coil stress, hydraulic recoil back-pressure, and thermal expansion during sustained operations.”

Performance Parameter	Standard CR Carbon Steel	High-Strength Auto Alloy (AHSS)	Silicon Grain-Oriented Steel (CRGO)
Strip Thickness Range	0.20 mm – 3.20 mm	0.40 mm – 2.50 mm	0.18 mm – 0.50 mm
Material Yield Strength (σs)	≤ 360 MPa	Up to 1180 MPa (DP / TRIP)	≤ 420 MPa (High Silicon)
Maximum Slitting Speed	120 – 220 m/min	80 – 140 m/min	100 – 180 m/min
Edge Burr Height Limit	≤ 0.02 mm or 3% t	≤ 0.035 mm or 4% t	≤ 0.010 mm (Tungsten Carbide tooling)
Width Tolerance Accuracy	±0.02 mm	±0.03 mm	±0.015 mm
Recoiling Tension Control	Pneumatic Friction Belt	Multi-Zone Hydraulic Segmented Pad	Vacuum Belt + Non-Contact Tension Stand

Smart Manufacturing Ecosystem

China Factory 4.0: Metallurgical Supply Chain Resilience

How Wuxi Jianfa utilizes the dense industrial supply cluster of Jiangsu to deliver rapid engineering customization, strict quality governance, and unmatched cost-to-performance equity.

100% In-House Heavy Machining

Spanning 40,000 m² of modern workshops, our facility houses 5-face CNC gantry boring centers, floor-type planer mills, and quench-hardening furnaces. Eliminating intermediate machining brokers ensures direct geometrical alignment control for slitter housings and recoiler shafts.

Smart IoT Closed-Loop Diagnostics

Every cold-rolled slitter leaving Jianfa integrates Siemens or Mitsubishi PLC controllers with proprietary telemetry sensors monitoring hydraulic fluid viscosity, motor bearing vibration spectrums, and automatic strip centering (EPC/CPC) in real-time.

Yangtze Delta Port Proximity

Positioned directly in Wuxi, Jiangsu along core transit arteries to the Port of Shanghai, heavy machinery shipments benefit from streamlined heavy-haul road logistics, direct breakbulk loading, and reduced shipping schedules for international buyers.

40+

Years Engineering Pedigree

40,000

m² Fabrication Footprint

45M

RMB Registered Capital

200+

Specialized Machine Builders

Worldwide Commercial Adoption

Localized Applications: Meeting Sector-Specific Slitting Thresholds

Cold-rolled steel coils form the foundation of global industrial components. Here is how Jianfa customizes machinery kinematics to fulfill rigid downstream expectations.

Automotive Stamping & Body-in-White

Modern automakers demand exposed and unexposed cold-rolled body blanks free of micro-cracks along sheared edges. Our slitting lines deliver precise progressive clearance adjustment, preventing edge tears that propagate during deep stamping dies.

Transformer Cores & Electrical Motors

Processing CRGO and CRNGO silicon steels requires zero magnetic degradation. Jianfa uses carbide-tipped slitting discs, specialized low-clearance arbor sleeves, and friction-less strip tables that eliminate magnetic flux path short-circuits.

Steel Service Centers (Tolling Services)

Service centers manage unpredictable contract demands across varying coil thicknesses. We supply quick-change twin-turret slitter heads allowing blade setups in under 8 minutes, dramatically shrinking downtime during gauge transitions.

Precision Tube & ERW Profile Mills

For high-frequency tube welding, strip camber and skew will cause welding seams to roll, resulting in defective reject rates. Our edge-trimming scrap winders and tensioning guides ensure razor-straight strips with parallel edges for immediate mill feeding.

Decision Engineering

Slitting vs. Cut to Length vs. Flying Shear Lines

Optimize your factory CAPEX allocation by matching your production throughput to the proper coil converting kinematics.

Continuous Rotary Slitting Line

Cuts mother coils into multiple narrow mults and rewinds them tightly onto a coiler drum. Crucial for continuous feeds into roll formers, pipe welding lines, and progressive blanking presses.

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Cut to Length (CTL) Line

Decoils, corrects residual coil curvature via multi-roll leveling, measures precise sheet lengths, and performs stop-action shearing to deliver neat sheet bundles onto automatic stackers.

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High-Speed Flying Shear Line

Incorporates an acceleration servo carriage allowing the cutting blade to match strip speed exactly. Cuts sheets dynamically without halting strip advance, delivering unmatched outputs for large sheet demands.

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International Proof of Quality

Deployed in Over 30 Countries Across 6 Continents

Jianfa metallurgical systems operate seamlessly across demanding climatic and logistical environments, supported by factory-dispatched commissioning engineers.

World map showing Wuxi Jianfa CR slitting machine global deployment

United States Mexico Brazil Argentina Peru Türkiye Greece Russia Kazakhstan United Arab Emirates Egypt South Africa India Vietnam Malaysia Australia

Trust & Verification

Verified Metallurgical Credentials & Standards Compliance

National key developing enterprise status in China's metallurgical machinery sector, backed by comprehensive ISO standards, CE declarations, and rigorous pre-shipment FAT tests.

ISO Quality Management

Comprehensive traceable documentation across alloy raw materials, machining inspections, and final assembly run tests.

CE Machinery Directives

Certified conformity under European Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU for EU installations.

National Developing Enterprise

Official recognition by metallurgical governing bodies validating four decades of continual mechanical innovations.

Technical Clarifications

Frequently Asked Questions: Global Procurement & Engineering

Crucial considerations for engineering teams specifying custom cold-rolled coil slitting lines.

What defines a true high-precision CR slitting machine compared to standard slitting lines?

A high-precision Cold-Rolled (CR) slitting line differs significantly in structural rigidity, arbor bearing tolerances, and tensioning methods. Standard lines tolerate shaft runouts up to 0.015mm, which ruins ultra-thin cold-rolled or silicon steel strips below 0.5mm. Our CR slitting machines feature ultra-precision NN30 series cylindrical roller bearings holding arbor deflection strictly under 0.005mm. Furthermore, they incorporate shimless CNC tooling, hydraulic quick-locking rings, and tension pads calibrated to eliminate surface scuff marks on mirror-finish or annealed surfaces.

How does Jianfa prevent camber and edge wave during high-speed cold-rolled slitting?

Camber occurs when residual stresses in the master coil release unevenly during slitting or when horizontal clearances between rotary knives flex during high radial forces. We mitigate this through three engineering interventions: (1) Integrating high-rigidity 4-column slitter housings with dual hydraulic tie-rod clamping; (2) Utilizing pre-slitting multi-roll levelers to eliminate longitudinal coil set and cross bow before the strip meets the cutters; and (3) Implementing dynamic looping pits that decouple slitter tension from recoiler pull, allowing each individual mult to relax independently without inducing edge strain.

Which material grades can be processed on your slitting and cut to length equipment?

Our lines handle cold-rolled carbon steel (SPCC, SPCD), high-strength automotive alloys (DP600 to DP1180), electrical steels (CRGO, CRNGO), austenitic and ferritic stainless steel (grade 200, 300, 400 series), hot-dip galvanized steel (GI, GL), as well as precision aluminum alloys (1000 to 6000 series). Every machine is custom engineered around your plant's specific yield strength limits (σs), coil weight capacities, and strip width ranges.

What parameters are required to generate an exact engineering layout and quote?

To prepare an optimized line proposal, our engineering team requires: (1) Raw material specification, yield strength, and tensile modulus; (2) Thickness range (minimum and maximum in mm); (3) Coil width range (mm); (4) Maximum master coil weight and inner/outer diameter (ID/OD); (5) Desired number of cuts at maximum thickness; (6) Strip width accuracy and allowable edge burr height; (7) Target line speed (e.g., 60m/min, 120m/min, or 180m/min); and (8) Electrical utility parameters at your facility (voltage, frequency, 3-phase).

What overseas installation, commissioning, and training services does Jianfa provide?

We deliver turnkey international support. Our senior mechanical and automation engineers travel directly to your facility to oversee foundation placement, mechanical anchoring, electrical interconnects, and dynamic cold/hot trial commissioning. Furthermore, we conduct structured operator training covering tooling setup formulas, knife sharpening schedules, safety interlocks, and regular preventative maintenance routines. Remote diagnostics over industrial VPN gateways are built-in for lifelong technical assistance.

Can international buyers visit the factory to conduct a Factory Acceptance Test (FAT)?

Yes, absolutely. We welcome all clients and third-party inspection firms (e.g., SGS, TÜV, Bureau Veritas) to our 40,000 m² production complex in Wuxi, Jiangsu — conveniently reached within 40 minutes from Shanghai via high-speed rail. Prior to export packing, we perform comprehensive mechanical dry-runs and customer coil test slitting to verify knife parallelism, speed regulation, noise thresholds, and hydraulic integrity against contractual acceptance milestones.

Full Production Range