INDUSTRY COMPONENT

Hinge Pin

A precision cylindrical pin that serves as the rotational axis in hinge assemblies, enabling controlled angular movement between connected machine parts.

Component Specifications

Definition
The hinge pin is a critical mechanical component designed as a cylindrical shaft that functions as the pivot point in hinge assemblies. It facilitates rotational motion between two or more connected parts while maintaining alignment and load-bearing capacity. In industrial applications, hinge pins are engineered to withstand shear forces, torsional stresses, and repetitive motion cycles while maintaining dimensional stability and wear resistance.
Working Principle
The hinge pin operates on the principle of rotational kinematics, providing a fixed axis of rotation for connected components. It transfers loads through shear strength while minimizing friction through precise tolerances and surface finishes. The pin's cylindrical geometry distributes stress evenly, while retention mechanisms (such as cotter pins, clips, or threaded ends) prevent axial displacement during operation.
Materials
Typically manufactured from alloy steels (AISI 4140, 4340), stainless steels (304, 316), or case-hardened steels with surface treatments (chrome plating, nitriding, zinc coating). Material selection depends on load requirements, corrosion resistance needs, and environmental conditions.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Length Range20-200 mm
Straightness0.05 mm per 100 mm
Shear Strength400-800 MPa
Surface FinishRa 0.4-0.8 μm
Surface Hardness45-55 HRC
Diameter Tolerance±0.01 mm

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 2338, DIN 7, ISO 8734, DIN 6325

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Shear failure under excessive load
  • Wear-induced clearance increase
  • Corrosion in harsh environments
  • Fatigue cracking from cyclic stress
  • Improper installation causing misalignment
FMEA Triads
Trigger: Insufficient shear strength for applied loads
Failure: Pin fracture during operation
Mitigation: Calculate maximum shear loads and select materials with appropriate strength margins; implement load monitoring systems
Trigger: Inadequate lubrication or contamination
Failure: Accelerated wear and increased friction
Mitigation: Establish regular lubrication schedules; use sealed hinge assemblies; implement contamination control measures
Trigger: Corrosive environment without protection
Failure: Surface pitting and diameter reduction
Mitigation: Specify corrosion-resistant materials or coatings; implement environmental controls; schedule regular inspections

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
ISO 2768-mK for general dimensions, ISO 286 for fit tolerances
Test Method
Shear testing per ASTM F606, hardness testing per ASTM E18, corrosion testing per ASTM B117, dimensional verification with CMM

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 Hinge Pin

Manufacturer profiles associated with Hinge Pin.

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Frequently Asked Questions

What is the primary function of a hinge pin in industrial machinery?

The hinge pin serves as the rotational axis that enables controlled angular movement between connected machine components while maintaining alignment and transferring loads through shear strength.

How do I select the right hinge pin material for corrosive environments?

For corrosive environments, specify stainless steel (304 or 316 grade) or carbon steel with appropriate protective coatings (zinc, chrome, or polymer coatings) based on chemical exposure and temperature conditions.

What are common failure modes for hinge pins?

Common failures include shear fracture from overload, wear-induced diameter reduction, corrosion pitting, and fatigue cracking from cyclic loading. Proper material selection, lubrication, and preventive maintenance mitigate these risks.

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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