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Locking Pins Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

Locking pins are cylindrical or tapered mechanical fasteners designed to engage with corresponding receptacles in quick attach couplers, providing positive locking through shear force, spring mechanisms, or hydraulic pressure to prevent accidental detachment during operation. They ensure precise alignment and load transfer between the machine and attachment.

Working Principle

Locking pins operate by inserting into aligned holes in the coupler and attachment, then engaging a locking mechanism (such as a spring-loaded ball, hydraulic cylinder, or manual lever) that prevents axial movement. This creates a rigid connection that transfers operational forces while allowing quick release when disengagement is required.

Materials

Typically made from alloy steel (e.g., AISI 4140, 4340) or stainless steel (e.g., 304, 316) with hardness of 28-32 HRC for standard applications, or 40-45 HRC for high-wear applications. May include surface treatments like zinc plating, black oxide, or hard chrome coating.

Technical Parameters

Length 50-300 mm
Diameter 20-100 mm
Load Capacity 10-500 kN
Surface Finish Ra 1.6-3.2 μm
Operating Temperature -40°C to 120°C

Standards

ISO 11901, DIN 1481, SAE J429

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Locking Pins.

Parent Products

This component is used in the following industrial products

Quick Attach Coupler

A mechanical interface that enables rapid attachment and detachment of various implements to a skid steer loader without tools.

View Product Details

Engineering Analysis

Risks & Mitigation

Shear failure under overload
Corrosion in harsh environments
Wear leading to reduced locking force
Improper installation causing detachment

FMEA Triads

Trigger: Material fatigue from cyclic loading
Failure: Pin fracture during operation
Mitigation: Use higher grade materials, implement regular inspection schedules, design with safety factors

Trigger: Contamination in locking mechanism
Failure: Failure to engage or disengage properly
Mitigation: Install protective covers, implement regular cleaning protocols, use sealed designs

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.05 mm for diameter, ±0.1 mm for length

Test Method

Load testing per ISO 11901, hardness testing per ASTM E18, dimensional verification with CMM

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 are the main types of locking pins for quick attach couplers?

The main types include spring-loaded ball lock pins, hydraulic locking pins, manual lever pins, and tapered locking pins, each suitable for different load requirements and operational environments.

How do I maintain locking pins for optimal performance?

Regular inspection for wear, cleaning of debris, lubrication of moving parts, and checking locking mechanism engagement. Replace pins showing significant wear or deformation.

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.

Locking Pins