INDUSTRY COMPONENT

Rod End

A spherical bearing component that connects piston rods to machinery, allowing angular movement while transmitting force.

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Component Specifications

Definition
A rod end is a mechanical joint component featuring a spherical bearing within a housing, designed to connect piston rods or linkages to other machine elements. It accommodates misalignment and angular movement through its spherical bearing design while transmitting axial and radial loads. The component typically consists of an outer housing with a threaded shank and an inner spherical bearing race that rotates and articulates, providing smooth motion transfer in hydraulic, pneumatic, and mechanical systems.
Working Principle
The rod end operates on the principle of spherical articulation, where a ball-shaped bearing surface rotates within a matching spherical housing. This allows the connected rod to pivot and swivel while maintaining load transmission capability. The spherical bearing design accommodates angular misalignment up to ±10-15 degrees, reducing stress concentrations and wear on connected components. Lubrication channels or self-lubricating materials minimize friction during articulation.
Materials
Housing: Carbon steel (AISI 1045/4140), stainless steel (AISI 304/316), or aluminum alloy (6061-T6). Bearing: Chrome steel (GCR15), bronze (C93200), or PTFE-lined composite. Threads: Rolled threads for strength (UNF or metric). Surface treatment: Zinc plating, black oxide, or hard chrome coating for corrosion resistance.
Technical Parameters
  • Thread Size M6-M30 or 1/4"-1 1/4"
  • Bore Diameter 6-50 mm
  • Load Capacity 5-200 kN static, 2-80 kN dynamic
  • Lubrication Type Grease fitting or self-lubricating
  • Temperature Range -40°C to +120°C
  • Angular Misalignment ±10° to ±15°
Standards
ISO 12240-1, DIN 648, SAE AS81934

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rod End.

rod end bearing spherical bearing piston rod connection linkage joint hydraulic cylinder end misalignment bearing industrial joint component Rod End Rod End in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Piston & Rod (Ram)

The combined assembly of the piston and its connecting rod that transmits force within a hydraulic ram.

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Piston & Rod

A critical assembly within hydraulic or electromechanical actuators that converts fluid pressure or electrical energy into linear mechanical motion.

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Actuator Piston/Rod

A mechanical component that converts hydraulic or pneumatic pressure into linear motion within an actuator system.

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Engineering Analysis

Risks & Mitigation
  • Bearing seizure due to contamination
  • Thread stripping from over-torquing
  • Fatigue failure from cyclic loading
  • Corrosion in harsh environments
FMEA Triads
Trigger: Insufficient lubrication
Failure: Increased friction leading to bearing seizure
Mitigation: Implement regular lubrication schedule; use self-lubricating materials
Trigger: Angular misalignment beyond design limits
Failure: Premature bearing wear and housing cracking
Mitigation: Install misalignment limiters; select higher-angle rod ends
Trigger: Corrosive environment exposure
Failure: Material degradation and loss of structural integrity
Mitigation: Specify stainless steel or coated materials; implement protective covers

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Bore diameter: H7 tolerance; Threads: 6g/6H tolerance per ISO 965
Test Method
Radial play test per ISO 12240-4; Load testing per ASTM F3142; Salt spray test per ASTM B117 for corrosion resistance

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between male and female rod ends?

Male rod ends have external threads on the shank, while female rod ends have internal threads. Male types connect directly to threaded rods, while female types accept threaded bolts or studs.

How often should rod ends be lubricated?

Grease-lubricated rod ends require lubrication every 500-1000 operating hours or as specified by the manufacturer. Self-lubricating types typically require no maintenance.

Can rod ends handle both radial and axial loads?

Yes, most industrial rod ends are designed to handle combined radial and axial loads, with specific load ratings provided by manufacturers for each direction.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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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