Mounting Eyes/Clevis: Load Capacity 5-200 kN

Component Specifications

Definition

Mounting eyes and clevis components are specialized mechanical connectors designed for attaching hydraulic or pneumatic luffing cylinders to equipment frames. These components feature precisely machined eyelets or fork-shaped ends that accommodate pins or bolts, creating secure pivot points that allow controlled angular movement while maintaining structural integrity under dynamic loads. They serve as critical interface elements between the cylinder body and the machine structure, enabling the cylinder to perform its lifting, lowering, or positioning functions while distributing forces appropriately.

Working Principle

Mounting eyes/clevis components function by providing secure attachment points that allow rotational movement around a fixed axis. The eye or clevis end accommodates a pin or bolt that creates a pivot joint, enabling the luffing cylinder to articulate while maintaining a fixed connection point. This pivot arrangement converts linear cylinder motion into controlled angular movement of the connected machinery elements, while the robust design distributes mechanical stresses across the attachment structure.

Materials

Typically manufactured from high-strength alloy steels (such as 4140, 4340, or similar grades), often heat-treated to achieve required hardness (typically HRC 28-35) and tensile strength (minimum 800 MPa). May include corrosion-resistant coatings like zinc plating, hot-dip galvanizing, or powder coating for environmental protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight Range	0.5-25 kg
Load Capacity	5-200 kN
Surface Finish	Ra 3.2 μm or better
Eye/Clevis Width	40-200 mm
Pin Diameter Range	20-100 mm
Operating Temperature	-40°C to +120°C

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 11901, DIN 71802, ISO 286-2

Parent Products

This component is used in the following industrial products

Luffing Cylinder

Hydraulic cylinder used to control the luffing (raising/lowering) motion of a crane jib or boom.

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Engineering Analysis

Risks & Mitigation

Fatigue failure under cyclic loading
Corrosion in harsh environments
Improper installation leading to misalignment
Wear at pivot points causing play
Overloading beyond rated capacity

FMEA Triads

Trigger: Material fatigue from cyclic loading
Failure: Crack propagation leading to catastrophic failure
Mitigation: Regular non-destructive testing, proper material selection with adequate fatigue strength, implementation of load monitoring systems

Trigger: Corrosion in aggressive environments
Failure: Reduced cross-section and strength degradation
Mitigation: Appropriate protective coatings, regular inspection, material selection based on environmental conditions

Trigger: Improper installation or alignment
Failure: Premature wear, binding, or unexpected stress concentrations
Mitigation: Precise installation procedures, alignment verification tools, trained personnel, proper torque application

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

H7/g6 fit for pin holes, ±0.1 mm dimensional tolerance on critical features, angular alignment within 0.5 degrees

Test Method

Load testing to 150% of rated capacity, fatigue testing per ISO 11901, dimensional verification with CMM, material certification per EN 10204 3.1

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 Mounting Eyes/Clevis

Manufacturer profiles associated with Mounting Eyes/Clevis.

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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 difference between mounting eyes and clevis attachments?

Mounting eyes are single-loop attachments, while clevis components feature a forked design with two parallel arms. Clevis attachments provide better load distribution and alignment stability for heavier applications.

How do I select the correct mounting eye/clevis for my luffing cylinder?

Selection requires matching pin diameter, load capacity (with appropriate safety factor), material compatibility with operating environment, and dimensional compatibility with both cylinder and machine structure attachment points.

What maintenance do mounting eyes/clevis components require?

Regular inspection for wear, corrosion, or deformation; lubrication of pivot points; torque verification of fasteners; and replacement according to manufacturer's service intervals or when wear exceeds specified limits.

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.

Mounting Eyes/Clevis