ISO 815 -1 Type B (with Ejector Pin) – Compression Set Test
ISO 815 -1 Type B (with Ejector Pin) – Compression Set Test
This cutting die is specifically designed for preparing standard disc-shaped specimens required for the ISO 815 -1 Type B compression set test.
It produces specimens with a diameter of 13.0 ± 0.5 mm, ensuring dimensional accuracy and clean cutting edges in accordance with international testing requirements.
Manufactured from durable, precision-machined materials, the die provides consistent specimen quality for reliable and repeatable test results across various rubber materials.
What Is the Compression Set Test?
The compression set is one of the most important mechanical performance tests in the rubber industry.
It evaluates a rubber material’s ability to return to its original thickness after being compressed for a prolonged period.
Why Is This Test Necessary?
Rubber components are often subjected to compression during actual use, such as:
O-rings / Gaskets / Anti-vibration pads
Automotive and motorcycle rubber parts / Cushioning components in footwear
Rubber components used in home appliances and engineering applications
If these parts are compressed for a long time and fail to recover, problems such as
air leakage, oil leakage, loss of elasticity, abnormal noise, or structural loosening may occur.
Therefore, the compression set is a critical quality indicator for evaluating rubber durability and long-term performance.
Why Choose Kind Snail?
- Precision Dimensional Control
The cutting edge is manufactured using high-precision CNC machining, ensuring that the diameter of the circular specimens consistently falls within ISO-specified tolerances. This enhances repeatability and reliability of the compression set test results. - High Durability with Alloy Steel Construction
Made from wear-resistant, high-hardness alloy steel, the die withstands long-term repetitive cutting while maintaining sharpness and dimensional stability. - Suitable for a Wide Range of Elastomers and Plastics
Applicable to natural rubber, SBR, EPDM, NBR, silicone rubber, TPV, TPE, EVA, and other materials. Ideal for R&D laboratories, quality control departments, and independent testing institutions. - Enhanced Specimen Consistency
The die prevents issues commonly associated with manual cutting—such as burrs and dimensional variations—thereby improving specimen uniformity and ensuring the reliability of test data.
Ejector Pin Features
1. Assists in Smooth Specimen Removal
After cutting, specimens may remain tightly lodged inside the cylindrical cavity of the die.
The ejector pin is inserted from the bottom to gently push the specimen out without damaging the edges or causing deformation.
2. Protects the Cutting Edge
Prevents the need for tapping or prying the die with hands or metal tools, reducing the risk of damaging the cutting edge.
3. Improves Operational Efficiency
Simple to operate, enabling rapid and continuous specimen preparation and improving overall laboratory workflow efficiency.
4. Single-Piece Alloy Steel Construction
The ejector pin is made from solid alloy steel with high hardness and rigidity, ensuring it remains straight and durable even under repeated use.
