INDUSTRY COMPONENT

Rod Body

A forged steel rod body that transmits force in hydraulic or pneumatic piston systems.

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Component Specifications

Definition
The rod body is the cylindrical structural component of a forged steel piston rod that connects the piston to the external load-bearing mechanism. It transmits linear force from the piston to the machine component, withstands tensile, compressive, and bending stresses during operation, and maintains precise alignment within the cylinder bore. Typically manufactured through hot forging processes for superior grain structure and mechanical properties.
Working Principle
Converts hydraulic or pneumatic pressure into linear mechanical motion by transferring force from the piston through the rod body to the external load. The rod's straightness and surface finish minimize friction while maintaining seal integrity.
Materials
AISI 4140/42CrMo4 forged steel, heat-treated to 28-32 HRC, with chrome plating (0.02-0.04mm thickness) for corrosion resistance and reduced friction.
Technical Parameters
  • Hardness 28-32 HRC
  • Straightness 0.1mm per meter
  • Yield Strength ≥ 650 MPa
  • Tensile Strength ≥ 850 MPa
  • Surface Roughness Ra 0.2-0.4μm
  • Diameter Tolerance h9
Standards
ISO 3320, ISO 4393, DIN 24540

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rod Body.

forged steel rod body piston rod component hydraulic rod pneumatic rod industrial piston rod rod body specifications Rod Body Rod Body in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Forged Steel Piston Rod

Precision-forged steel rod for hydraulic/pneumatic cylinder applications.

View Product Details

Precision Hydraulic Cylinder Piston Rod

High-precision cylindrical rod that transmits force in hydraulic systems.

View Product Details

Industrial-Grade Hydraulic Cylinder Piston Rod

Precision-ground steel rod for hydraulic cylinder actuation

View Product Details

Engineering Analysis

Risks & Mitigation
  • Fatigue failure from cyclic loading
  • Corrosion in harsh environments
  • Bending or buckling under excessive load
  • Surface damage leading to seal failure
FMEA Triads
Trigger: Improper heat treatment
Failure: Reduced hardness and premature wear
Mitigation: Implement strict thermal process controls and hardness testing
Trigger: Inadequate surface finish
Failure: Increased seal wear and fluid leakage
Mitigation: Maintain Ra 0.2-0.4μm surface roughness with regular polishing and inspection
Trigger: Material defects in forging
Failure: Crack initiation and catastrophic failure
Mitigation: Use ultrasonic testing and magnetic particle inspection on all forged blanks

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter: h9 per ISO 286-2, Straightness: ≤0.1mm/m per ISO 1101
Test Method
Hardness testing (Rockwell C), dimensional verification with CMM, surface roughness measurement, non-destructive testing (UT/MPI)

Buyer Feedback

★★★★☆ 4.6 / 5.0 (11 reviews)

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Rod Body so far."

"Testing the Rod Body now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

Why is forged steel used for rod bodies?

Forged steel provides superior grain flow, increased strength, better fatigue resistance, and reduced porosity compared to cast or machined alternatives, making it ideal for high-stress applications.

What maintenance does a rod body require?

Regular inspection for surface scratches, corrosion, or bending; cleaning to prevent contamination; and monitoring of chrome plating wear to maintain seal effectiveness and prevent fluid leakage.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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