INDUSTRY COMPONENT

Connecting Rod

A connecting rod is a rigid mechanical component that transmits motion between a piston and a crankshaft in an oscillation mechanism.

Component Specifications

Definition
In an oscillation mechanism, the connecting rod is a critical load-bearing component that converts the reciprocating linear motion of the piston into the rotational motion of the crankshaft. It acts as a structural link, transferring force and motion while withstanding significant compressive, tensile, and bending stresses. Its design ensures precise alignment and minimal energy loss during the conversion process.
Working Principle
The connecting rod operates on the principle of rigid-body kinematics. One end (the small end) is connected to the piston pin, allowing it to pivot as the piston reciprocates. The other end (the big end) is connected to the crankshaft journal, rotating with the crankshaft. As the piston moves, the angular displacement of the connecting rod transforms linear displacement into rotational torque at the crankshaft.
Materials
Typically forged steel (e.g., AISI 4340, EN19) or aluminum alloy (e.g., 7075-T6) for high strength-to-weight ratio. Advanced applications may use titanium alloys or composite materials. Surface treatments include shot peening, nitriding, or coating for wear resistance.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Weight0.5-5.0 kg
Fatigue Strength300-500 MPa
Big End Bore Diameter40-120 mm
Small End Bore Diameter20-50 mm
Length (Center To Center)100-500 mm
Ultimate Tensile Strength800-1200 MPa

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 13535, DIN 7526

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Fatigue failure due to cyclic loading
  • Bearing wear at connection points
  • Misalignment causing binding or seizure
  • Corrosion in harsh environments
FMEA Triads
Trigger: Material defect or improper heat treatment
Failure: Fracture under high-stress cycles
Mitigation: Implement strict material certification, non-destructive testing (NDT), and quality control during manufacturing.
Trigger: Insufficient lubrication at bearing surfaces
Failure: Accelerated wear, overheating, and seizure
Mitigation: Design reliable lubrication systems, use wear-resistant coatings, and schedule regular maintenance.
Trigger: Dynamic imbalance or misalignment during assembly
Failure: Increased vibration, noise, and premature failure
Mitigation: Precision balancing, alignment checks during installation, and use of alignment tools.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Dimensional tolerances per ISO 2768-m, bore concentricity within 0.02 mm, surface finish Ra 0.8-1.6 μm
Test Method
Fatigue testing per ISO 13535, hardness testing (Rockwell C), magnetic particle inspection for cracks, coordinate measuring machine (CMM) for geometry

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 Connecting Rod

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Shandong Huaquan Power Co., Ltd.
Weifang, Shandong, CN
42,000 m²
ISO CE
Also makes: Water Pump, Diesel Engine, High-Pressure Pump and 9 more
Listed on the company's own website · profile compiled by CNFX from public sources

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

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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.
Shaft Bearing
Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.
Seal Groove
Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What is the primary function of a connecting rod in an oscillation mechanism?

Its primary function is to transmit force and motion from the reciprocating piston to the rotating crankshaft, converting linear motion into rotational torque.

Why are connecting rods often made from forged steel?

Forged steel provides high strength, durability, and fatigue resistance necessary to withstand cyclic loads and stresses in oscillation mechanisms.

How does the length of a connecting rod affect mechanism performance?

Rod length influences the stroke ratio, piston velocity, and side thrust, affecting efficiency, vibration, and torque characteristics of the mechanism.

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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