INDUSTRY COMPONENT

Rod

A precision-machined rod that transmits linear force in hydraulic and pneumatic actuators.

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Component Specifications

Definition
The rod is a critical load-bearing component in hydraulic cylinders and pneumatic actuators, designed to convert fluid pressure into linear mechanical motion. It connects the piston to the external load, transmitting force while maintaining alignment and sealing integrity through the cylinder head. Precision-ground surfaces ensure smooth operation and prevent leakage.
Working Principle
The rod moves linearly within the cylinder bore as hydraulic fluid or compressed air acts on the piston. It transfers force from the internal pressure differential to external machinery, with seals preventing fluid leakage and wipers excluding contaminants.
Materials
Typically high-strength alloy steel (e.g., AISI 4140, 1045 carbon steel) with chrome plating (hard chrome, thickness 20-40μm) for corrosion resistance, wear resistance, and reduced friction. Alternative materials include stainless steel (316, 17-4PH) for corrosive environments.
Technical Parameters
  • Hardness 45-55 HRC (core), 65-70 HRC (chrome plating)
  • Length Range 50-6000 mm
  • Straightness 0.05 mm per 1000 mm
  • Surface Roughness Ra 0.2-0.4 μm
  • Diameter Tolerance h8/h9 (ISO)
Standards
ISO 6020/2, ISO 6432, DIN 24554, DIN ISO 3320

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rod.

hydraulic rod piston rod cylinder rod chrome-plated rod actuator component linear motion ISO 6020 DIN 24554 Rod Rod in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Actuator (e.g., hydraulic cylinder)

A mechanical device that converts energy into motion to apply force in a crimping head assembly.

View Product Details

Actuator (solenoid/pneumatic cylinder)

A linear motion device that converts electrical or pneumatic energy into mechanical force to perform cutting actions.

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Actuator (e.g., Pneumatic Cylinder, Solenoid)

A device that converts energy into mechanical motion to apply or release braking force in a tension control system.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Fatigue failure from cyclic loading
  • Corrosion in humid/chemical environments
  • Seal wear due to surface imperfections
  • Bending from off-axis loads
FMEA Triads
Trigger: Improper alignment or side loading
Failure: Rod bending or scoring, leading to seal damage and fluid leakage
Mitigation: Use alignment couplings, ensure proper cylinder mounting, and specify adequate rod hardness
Trigger: Insufficient chrome plating thickness or quality
Failure: Corrosion pitting and accelerated seal wear
Mitigation: Specify hard chrome plating per ISO 6158, conduct regular thickness checks

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter: h8/h9 per ISO 286, Straightness: ≤0.1 mm/m per ISO 1101
Test Method
Dimensional inspection (CMM), hardness testing (Rockwell), coating thickness (XRF), salt spray testing per ISO 9227

Buyer Feedback

★★★★☆ 4.9 / 5.0 (28 reviews)

"The technical documentation for this Rod is very thorough, especially regarding technical reliability."

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

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

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Frequently Asked Questions

Why is chrome plating used on piston rods?

Chrome plating provides excellent corrosion resistance, reduces friction with seals, and enhances wear durability in harsh industrial environments.

What causes rod bending or scoring?

Misalignment, side loading, inadequate hardness, or contamination ingress can lead to bending, scoring, or seal damage, resulting in leakage and reduced efficiency.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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