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
ParameterTypical rangeNotes & selection driver
Hardness28-32 HRC
Straightness0.1mm per meter
Yield Strength≥ 650 MPa
Tensile Strength≥ 850 MPa
Surface RoughnessRa 0.2-0.4μm
Diameter Toleranceh9

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 3320, ISO 4393, DIN 24540

Parent Products

This component is used in the following industrial products

Forged Steel Piston Rod

A forged steel piston rod is a critical component in hydraulic and pneumatic cylinders, transmitting linear force from the piston to the external load while maintaining alignment and resisting bending moments.

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Precision Hydraulic Cylinder Piston Rod

A precision-machined cylindrical component that serves as the force-transmitting element in hydraulic cylinders.

View Product Details

Industrial-Grade Hydraulic Cylinder Piston Rod

This industrial-grade piston rod is a precision-ground cylindrical component designed for use in hydraulic cylinders.

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

Typical Suppliers & Equivalents

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)

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Rod Body

Manufacturer profiles associated with Rod Body.

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Mounting Interface
Precision mounting interface connecting punch tips to pharmaceutical tablet press machines for accurate tablet production.
Chrome Plating
Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.
Upper Tool (Punch)
Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.
Main Frame
The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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