What is cantilever bend testing?
Definition and purpose
Cantilever bend testing assesses a component’s flexural response by applying a controlled force at a set distance from a fixed end. The test measures bend force, stiffness, deflection angle, and, where relevant, the break point.
This method is commonly used for small, delicate components where flexibility and resistance to deformation are critical. Examples include:
- Electrical terminals that must flex without breaking
- Toothbrush bristles that require consistent deflection resistance
- Syringe needle shafts where controlled flexibility ensures safety and performance
- Aluminium screw caps that must retain shape during application
How it is performed
The test typically involves:
- Securing one end of the sample in a fixed clamp or fixture.
- Applying force at a defined point along the free end, perpendicular to its length.
- Measuring the applied force and resulting deflection to calculate stiffness or detect failure.
Fixtures are selected or designed for the component’s shape and material properties. For example, toothbrush bristles may require a multi-position head clamp, while an aluminium cap may need a contoured holder to prevent slippage.
Anchorage strength testing
Definition and purpose
Anchorage strength testing evaluates how securely a component is fixed into place, whether crimped, inserted, bonded, or moulded into a base. The aim is to determine the pull-out, push-out, or shear force needed to cause separation.
This is critical in applications where product safety depends on retention strength, such as:
- Toothbrush tuft pull-out resistance
- Electrical pin or terminal retention in connectors
- Embedded roots in composite materials
How it is performed
Typical steps include:
- Clamping the base or housing of the component in a fixed grip.
- Applying force directly to the inserted or embedded part via a pull, push, or rotational load.
- Recording the maximum force before detachment or failure.
Specialised fixtures, such as vice-style grips or spring-loaded clamps, are often used to maintain alignment and avoid damage before testing begins.
Industry standards for material testing
Relevant standards
- MIL-STD-202 - Covers mechanical and environmental tests for electronic components, including terminal bending and pull tests.
- ISO 20126 - Specifies methods for measuring toothbrush tuft retention force, with defined minimum pull-out values.
- BS EN ISO 9626 - Defines requirements for stainless steel needle tubing, including stiffness and strength parameters.
- ASTM D2281 - Specifies methods for determining bending strength of needles.
Why standards matter
Following recognised standards ensures results are:
- Repeatable and reproducible across laboratories
- Accepted by regulators and customers
- Useful for benchmarking supplier performance
Compliance also guides fixture design and test parameters, as both must meet the dimensional and procedural requirements specified.
Specialised testing techniques
Application areas
Cantilever bend and anchorage strength tests can be adapted for niche applications, including:
- Lipstick bullet break testing to ensure cosmetic products maintain structural integrity during use
- Needle flexure testing to measure syringe needle bend resistance without permanent deformation
- Diamond tool edge break strength testing to verify durability of precision cutting instruments
- Crease line strength testing in packaging to ensure folding cartons hold shape under load
Why they matter
Many products have unique performance requirements that cannot be addressed with generic fixtures. Niche tests often require:
- Modified protocols
- Custom holding jigs
- Fine-resolution sensors to detect small forces or subtle deflections
This adaptability allows manufacturers to test precisely for their market needs and reduce in-service failures.
Custom-fit material testing services
Tailored fixtures and adaptations
Accurate testing often depends on the right fixture design. Mecmesin’s engineering team assesses component geometry, material properties, and intended failure modes to create fixtures that deliver precise, repeatable results.
Examples include:
- Angled clamps for toothbrush heads
- Contoured supports for glass syringes
- Spring-loaded inserts for uneven or fragile parts
Benefits of custom solutions
- Improved repeatability by reducing variability between tests
- Better sample alignment for consistent force application
- Adaptability for testing fragile, small, or irregular components without causing damage before testing
Why Mecmesin for material testing solutions
Expertise across diverse sectors
Mecmesin has decades of experience supporting industries from packaging and oral care to pharmaceuticals, electronics, and personal care. Test setups are engineered to meet both technical and regulatory requirements.
Precision testing equipment
Using advanced force and torque measurement systems, such as the MultiTest-dV and OmniTest ranges combined with VectorPro software, Mecmesin delivers accurate, traceable results with real-time analytics.
Flexibility for custom solutions
With a modular approach and in-house fixture design capabilities, Mecmesin can adapt systems for standardised tests or create bespoke setups for unconventional components.
End-to-end support
Services include installation, operator training, calibration, and ongoing technical assistance through a global partner network, ensuring long-term consistency and reliability.
Speak to an expert
Cantilever bend and anchorage strength testing are essential for validating product performance and ensuring safety in real-world use. Whether you need guidance on fixture selection, test system specification, or compliance with relevant standards, Mecmesin’s experts can provide tailored advice to meet your requirements.
Standards
Featured or equivalent test standards for Mecmesin solutions in this section