Boom Connection Point: Pin Diameter 100-300 mm

Component Specifications

Definition

A precision-engineered structural interface component that mechanically connects the crane boom to the superstructure, designed to transfer operational loads (including vertical, horizontal, and torsional forces) while allowing controlled articulation for boom positioning. It incorporates bearing surfaces, pin connections, or hydraulic pivot mechanisms depending on crane design, and must maintain structural integrity under dynamic loading conditions during lifting operations.

Working Principle

Functions as a load-transfer pivot point using either mechanical pin-and-bushing systems or hydraulic articulation mechanisms. Distributes stresses from the boom through reinforced structural members into the superstructure frame while allowing rotational movement for boom elevation and sometimes limited lateral swing. Incorporates wear surfaces and lubrication systems to reduce friction and prevent premature failure.

Materials

High-strength alloy steel (typically ASTM A572 Grade 50 or equivalent), forged or cast with heat treatment (quenching and tempering) to achieve 450-550 MPa yield strength. Bearing surfaces may use hardened steel inserts or bronze bushings. Corrosion protection through galvanization or epoxy coating.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight	200-1500 kg
Design Life	Minimum 20,000 operating hours
Pin Diameter	100-300 mm
Load Capacity	50-500 metric tons (design dependent)
Rotation Range	0-85 degrees elevation
Lubrication Type	Centralized automatic grease system

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 4301, ISO 12488, DIN 15018, DIN 4114

Parent Products

This component is used in the following industrial products

Crane Superstructure

The upper structural framework of a floating crane that supports the lifting mechanism and operator cabin.

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Engineering Analysis

Risks & Mitigation

Structural fatigue failure
Bearing surface wear leading to play
Corrosion in marine environments
Improper lubrication causing seizure
Overload deformation

FMEA Triads

Trigger: Inadequate lubrication
Failure: Increased friction leading to accelerated wear and potential seizure
Mitigation: Implement automated lubrication system with monitoring alarms

Trigger: Cyclic loading beyond design limits
Failure: Fatigue cracking at stress concentration points
Mitigation: Regular non-destructive testing (magnetic particle or ultrasonic)

Trigger: Corrosive environment exposure
Failure: Reduced cross-section and strength due to material loss
Mitigation: Apply corrosion-resistant coatings and establish protective maintenance schedule

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Pin hole diameter: H7 tolerance, Surface finish: Ra 1.6 μm maximum on bearing surfaces

Test Method

Load testing to 125% of rated capacity, NDT (ultrasonic/magnetic particle) for crack detection, 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 Boom Connection Point

Manufacturer profiles associated with Boom Connection Point.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a boom connection point?

To safely transfer all operational loads from the boom to the crane superstructure while allowing controlled articulation for boom positioning.

How often should boom connection points be inspected?

Visual inspection before each shift, detailed inspection every 250 operating hours, and comprehensive NDT inspection annually or per manufacturer recommendations.

What are common failure modes for boom connection points?

Fatigue cracking at stress concentrations, bearing surface wear, corrosion in pin holes, and deformation from overload conditions.

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.

Boom Connection Point