Industry-Verified Manufacturing Data (2026)

Main Bending Roller

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Main Bending Roller used in the Other Transport Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Main Bending Roller is characterized by the integration of Roller Shaft and Roller Shell/Body. In industrial production environments, manufacturers listed on CNFX commonly emphasize Forged Alloy Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The primary cylindrical component that applies bending force to marine hull plates during the forming process.

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Product Specifications

Technical details and manufacturing context for Main Bending Roller

Definition
The Main Bending Roller is the central working component of a Marine Hull Plate Bending Roller. It is the roller that directly contacts and deforms the steel plate under hydraulic or mechanical pressure, creating the curved profiles required for ship hull construction. Its precise diameter, surface hardness, and alignment are critical for achieving accurate plate curvature without causing surface defects.
Working Principle
The roller rotates and, in conjunction with supporting rollers, applies concentrated linear force to a steel plate positioned between them. This force induces plastic deformation along the plate's length, creating a consistent radius of curvature. The bending radius is controlled by adjusting the vertical position of the main roller relative to the support rollers and the feed rate of the plate.
Common Materials
Forged Alloy Steel
Technical Parameters
  • Diameter of the main bending roller, which influences the minimum achievable bending radius and the force distribution on the plate. (mm) Customizable
Components / BOM
  • Roller Shaft
    Provides the structural core and rotational axis for the roller, transmitting torque and supporting bending loads.
    Material: Alloy Steel
  • Roller Shell/Body
    The outer cylindrical surface that directly contacts and bends the metal plate. Often hardened and sometimes coated.
    Material: Hardened Alloy Steel
  • Bearing Journals
    Precision-machined ends of the shaft that interface with bearings in the machine housing, allowing smooth rotation under load.
    Material: Alloy Steel
Engineering Reasoning
150-350 kN bending force, 0.5-2.0 rpm rotational speed, 20-80°C operating temperature
Material yield strength exceeded at 450 MPa stress, surface temperature exceeds 120°C causing thermal softening, deflection exceeds 0.15 mm/m length
Design Rationale: Cyclic plastic deformation leading to low-cycle fatigue (Coffin-Manson relationship), Hertzian contact stress exceeding 1.5 GPa causing subsurface cracking, thermal gradient-induced residual stresses exceeding 300 MPa
Risk Mitigation (FMEA)
Trigger Hydraulic pressure surge exceeding 35 MPa due to valve malfunction
Mode: Roller shaft permanent deformation exceeding 0.3 mm radial runout
Strategy: Pressure relief valve with 30 MPa cracking pressure and 5 ms response time
Trigger Abrasive particle contamination (ISO 4406 18/16/13) in lubricant
Mode: Surface pitting and spalling with material loss exceeding 0.1 mm depth
Strategy: Dual-stage filtration system with 3 μm absolute rating and magnetic particle trap

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Main Bending Roller.

marine hull plate bending roller forged alloy steel bending roller shipbuilding bending roller component main bending roller for transport equipment cylindrical hull forming roller

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Max 500 bar
other spec: Plate thickness range: 5-100 mm, Roller speed: 0.5-5 m/min
temperature: 0°C to 150°C
Media Compatibility
✓ Marine-grade steel plates ✓ Aluminum alloy plates ✓ High-strength low-alloy (HSLA) steel
Unsuitable: Abrasive slurry environments with sand or grit concentrations above 5%
Sizing Data Required
  • Plate material yield strength (MPa)
  • Maximum plate thickness (mm)
  • Required bending radius (m)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Surface fatigue cracking
Cause: Cyclic bending stresses exceeding material endurance limit, often due to improper material selection, excessive loads, or inadequate surface hardening
Bearing seizure
Cause: Lubrication failure from contamination, improper lubricant selection, or inadequate lubrication intervals leading to overheating and metal-to-metal contact
Maintenance Indicators
  • Visible surface cracks or spalling on roller contact surface
  • Abnormal vibration or audible grinding noises during operation
Engineering Tips
  • Implement predictive maintenance with vibration analysis and thermography to detect early bearing degradation and surface defects
  • Establish proper lubrication regimen with contamination control and use of appropriate high-temperature, extreme-pressure lubricants for rolling contact applications

Compliance & Manufacturing Standards

Reference Standards
ISO 1219-2:2012 (Fluid power systems and components) ANSI B11.0-2020 (Safety of machinery) DIN 8586:2003 (Forming machines - Bending and straightening machines)
Manufacturing Precision
  • Roller diameter tolerance: +/-0.05mm
  • Roller concentricity: 0.03mm TIR
Quality Inspection
  • Hardness testing (Rockwell C scale)
  • Dimensional verification with CMM

Factories Producing Main Bending Roller

Verified manufacturers with capability to produce this product in China

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✓ 92% Supplier Capability Match Found

P Project Engineer from United States Jan 09, 2026
★★★★★
"As a professional in the Other Transport Equipment Manufacturing sector, I confirm this Main Bending Roller meets all ISO standards."
Technical Specifications Verified
S Sourcing Manager from United Arab Emirates Jan 06, 2026
★★★★★
"Standard OEM quality for Other Transport Equipment Manufacturing applications. The Main Bending Roller arrived with full certification."
Technical Specifications Verified
P Procurement Specialist from Australia Jan 03, 2026
★★★★★
"Great transparency on the Main Bending Roller components. Essential for our Other Transport Equipment Manufacturing supply chain."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

14 sourcing managers are analyzing this specification now. Last inquiry for Main Bending Roller from USA (1h ago).

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Frequently Asked Questions

What is the primary function of the main bending roller in marine manufacturing?

The main bending roller applies controlled bending force to marine hull plates during the forming process, shaping steel plates to precise curvature specifications for ship hull construction.

Why is forged alloy steel used for this bending roller?

Forged alloy steel provides exceptional strength, durability, and resistance to deformation under high pressure, ensuring consistent performance and longevity in demanding marine manufacturing environments.

What maintenance is required for the main bending roller components?

Regular inspection of bearing journals for wear, lubrication of roller shaft assemblies, and monitoring of roller shell surface integrity are essential maintenance practices to ensure optimal performance and prevent downtime.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Other Transport Equipment Manufacturing sector.

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