ASTM D4562 Adhesives Shear Strength Using Pin-and-Collar Specimen

The ASTM D4562 shear strength test is performed on an adhesive bonded pin-and-collar specimen. The apparatus holds the collar firm, while a compressive force is applied on the pin, till the adhesive bond fails by shear. The ASTM D4562 adhesive shear strength is expressed in pounds per square inch (psi).

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ASTM D4562 Adhesives Shear Strength Using Pin-and-Collar Specimen

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Overview
Scope, Applications, and Benefits
Test Process
Specifications
Instrumentation
Results and Deliverables

Overview

ASTM D4562 defines a standardized method for determining the shear strength of adhesive bonds using a pin-and-collar specimen geometry. This test configuration is specifically designed to evaluate adhesives used in cylindrical assembly applications — such as bonded shafts, pins, and bushings — where the adhesive must transfer torsional or axial shear loads between cylindrical mating surfaces.

The pin-and-collar specimen consists of a cylindrical pin bonded within a matching collar, with a controlled annular adhesive bondline. The bonded assembly is loaded axially in a push-out or pull-out configuration on a universal testing machine, inducing shear stress at the adhesive-substrate interface. The shear strength is calculated from the failure load divided by the bonded cylindrical surface area. This test is widely used to qualify retaining compounds, anaerobic adhesives, and structural cylindrical-bond adhesives.

Scope, Applications, and Benefits

Scope

ASTM D4562 evaluates:

Shear strength of adhesive bonds in cylindrical assemblies
Effect of bondline gap on adhesive shear strength
Influence of substrate material on cylindrical bond performance
Surface preparation effects on pin-collar bond strength
Environmental conditioning effects on cylindrical bond strength
Comparative shear strength of retaining and structural adhesives

Applications

Retaining compound (anaerobic adhesive) qualification
Bearing and bushing retention bonding
Shaft and sleeve assembly bonding
Automotive powertrain component bonding
Industrial machinery cylindrical assembly
Precision instrument component bonding
Research and development in cylindrical joint adhesives

Benefits

Directly relevant to cylindrical assembly bonding applications
Simulates real-world pin-in-collar load transfer geometry
Enables selection of adhesives for cylindrical retention applications
Detects gap-filling performance limitations
Supports process development for cylindrical bond applications
Provides compliance data for retaining compound specifications

Test Process

Specimen Fabrication

Pin and collar are machined to specified dimensions; adhesive is applied and the assembly is cured.

Fixture Setup

Bonded pin-collar assembly is placed in the push-out or pull-out test fixture.

Axial Loading

Load is applied at a controlled rate until bond failure; peak load is recorded.

Shear Strength Calculation

Shear strength is calculated from peak load divided by bonded cylindrical area.

Technical Specifications

Parameter	Details
Test Principle	Axial push-out/pull-out of cylindrical pin-collar assembly
Specimen Type	Pin-in-collar cylindrical assembly
Applicable Materials	Retaining compounds, anaerobic and structural adhesives
Output Units	MPa (psi)
Measured Outputs	Shear strength, failure mode

Instrumentation Used for Testing

Universal testing machine (UTM) with push-out/pull-out fixture
Machined pin and collar specimens
Micrometer for gap measurement
Load cell calibrated to test range
Data acquisition software
Failure surface examination tools

Results and Deliverables

Pin-collar shear strength values (MPa or psi)
Load-displacement curves
Failure mode classification
Gap size vs. strength relationship
Compliance reports

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Frequently Asked Questions

ASTM D4562 measures shear strength of adhesives using pin-and-collar specimens. It evaluates bond performance under shear loading, helping assess reliability of adhesive joints in cylindrical or rotational assemblies.

Key parameters include specimen dimensions, adhesive thickness, curing conditions, alignment, and loading rate. Controlled conditions ensure accurate measurement of shear strength in pin-and-collar adhesive joints.

The test measures shear strength of adhesive bonds, typically expressed in stress units. Results indicate load-bearing capability and performance of adhesive joints under shear forces.

ASTM D4562 applies to adhesives bonding cylindrical components such as shafts, sleeves, and collars used in automotive, aerospace, and industrial mechanical assemblies.

ASTM D4562 results depend on specimen preparation and curing conditions. It may not fully represent real-world service conditions, requiring additional testing for fatigue, temperature, and environmental effects.