How to Make O-Ring with 90 Duro Natural Rubber?

O-rings are used in a wide range of industries to help you tightly seal the connections in pipes, tubes, and other elements of complex hydraulic and pneumatic systems. Due to many applications, there is also a wide variety of O-ring material choices available. Nitrile (Buna), Neoprene, Ethylene Propylene (EPDM Rubber), Silicone, Fluorocarbon (Viton), and PTFE (Teflon) are among the most commonly used compounds for O-rings and seals.

This video is about how to produce the O-ring with 90 duro hardness.

As we all know, O-ring durometer impacts overall sealing function of the seal depending on application parameters.

Softer sealing materials, with lower hardness readings, will flow more easily into the microfine grooves and imperfections of the mating parts (the gland, bore, rod or seal flanges). This is particularly important in low-pressure seals because they are not activated by fluid pressure. Conversely, the harder materials offer greater resistance to extrusion.

In actual production process, too soft or too hard natural rubber is not easy to be formed, which causes a much long cycle time. For example, the 90-degree natural rubber O-ring in this video, the cycle time is up to about 10 minutes.

Fitmold is specialized in producing different O-rings with various materials, Welcome to customize your own silicone (rubber) parts.

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