Overview
EN ISO 10123:2019 (adoption of ISO 10123:2013) specifies a laboratory test method to determine the static shear strength of anaerobic-curing liquid adhesives using standardized pin-and-collar specimens. Published by CEN, this standard is intended primarily for ranking and quality control of adhesives used to retain cylindrical assemblies (pin-and-collar) or to lock and seal threaded fasteners. It is important to note the test result is for comparative purposes and is not necessarily a direct indicator of in-service performance or for numerical structural design.
Key topics and technical requirements
- Test principle: Measure the maximum load (F) to shear the adhesive joint and calculate shear strength τ = F / S (S = bond area).
- Specimen geometry and finish:
- Nominal pin diameter and collar internal diameter: 20 mm (nominal).
- Collar width: 18.00 ± 0.05 mm; effective bonded length used in calculations is 16 mm (accounting for chamfers).
- Surface finish: 0.8–1.6 µm.
- Apparatus:
- Universal testing machine compliant with ISO 7500-1 (class 1).
- Hardened steel specimen support and non‑adhering sheet (e.g., polyethylene).
- Specimen preparation:
- Degreasing and controlled storage (23 ± 2 °C); use within 4 days after cleaning to avoid oxidation.
- Apply adhesive uniformly to pin and collar; assemble with helicoidal motion within 6 s; cure per manufacturer instructions.
- Test procedure:
- Conditioning as required, place assembly in support, load at 1–2 mm/min crosshead speed.
- Test at least five specimens; record maximum load in newtons and compute shear strength in MPa.
- Reporting: Must include adhesive identification, substrate materials and surface prep, application conditions, conditioning, number of specimens, crosshead speed, average loads and standard deviations.
- Limitations: Precision statistic is unavailable (no interlaboratory data provided); not intended for numerical design data.
Applications
- Quality control and batch ranking of anaerobic adhesives used in retaining rings, bushings, pin-and-collar assemblies, and threadlocking/ sealing applications.
- R&D and product development for comparing formulations and curing conditions.
- Laboratory testing to support claims about shear strength under standardized conditions.
Who should use this standard
- Adhesive manufacturers and formulators
- Materials and mechanical test laboratories
- Quality assurance/quality control teams in manufacturing
- Product development engineers evaluating adhesive performance
Related standards
- ISO 7500-1 - verification of testing machines
- ISO 683-9 - recommended steel grades for specimens
- ISO 4588 - metal surface preparation for adhesive bonding
Keywords: EN ISO 10123:2019, anaerobic adhesives, shear strength, pin-and-collar, adhesives testing, test method, CEN, quality control.
