70 Shore A Hardness Characteristics
Balanced Elasticity
A hardness of 70 Shore A provides a balance between flexibility and compression. The O ring can deform under assembly pressure to create sealing contact while recovering its original shape after the load is released.
Recovery After Compression
After the sealing load is released, the O ring is designed to recover its original shape. This elastic recovery helps maintain dimensional stability during repeated assembly and maintenance.
Suitable for General Sealing Conditions
70 Shore A is widely used for both static sealing and selected dynamic sealing applications. The appropriate material and groove design should be selected according to the operating pressure, temperature, movement, and sealing medium.
Controlled Compression
The 70 Shore A compound provides consistent compression within a properly designed groove. Correct compression helps maintain sealing performance while reducing the risk of excessive deformation caused by overloading.
- Standard & Custom Size Production
Chaoyue manufactures 70 Shore A O Rings in standard metric, AS568, and custom dimensions. Production can be arranged according to customer drawings, samples, or sealing groove specifications.
- Multiple Material Options
70 Shore A hardness is available in different rubber compounds, including NBR, EPDM, FKM, Silicone, and HNBR. Material selection is based on the sealing medium, operating temperature, and application requirements.
- Batch Production for OEM Supply
Chaoyue supports both prototype and volume production for industrial OEM projects. Consistent molding processes and dimensional control help maintain uniform product specifications across production batches.
FAQ
Why are O Rings commonly used?
A hardness of 70 Shore A provides a balance between flexibility and compression. It allows the O ring to conform to sealing surfaces while maintaining sufficient resilience for general industrial sealing applications.
What is the difference between 70 Shore A and 90 Shore A O Rings?
A 70 Shore A O Ring is more flexible and requires less installation force, while a 90 Shore A O Ring provides greater resistance to deformation and extrusion in higher-pressure applications. The appropriate hardness depends on the sealing conditions and groove design.
Can 70 Shore A O Rings be used for dynamic sealing?
Yes. They are commonly used in many static sealing applications and selected dynamic sealing systems. The suitability depends on factors such as operating speed, pressure, lubrication, and the sealing medium.
