The O-ring is a circular cross-section seal. It is made by vulcanization in a finished form tool. It is used for static seals, hydraulic and pneumatic cylinders, and it is also possible to use it for piston, rotary, and circular motions.
It is used in various industries: hydraulic, pneumatic, armature industry, automotive and many others. O-rings can be made of different materials and can be of different hardness depending on the pressure, type of sealing and surface quality of the machine parts.
For standard applications, the recommended hardness is 70ShA.
The rubber cord / string
Circular cross-section material that can be cut to the required length. It can be made of various types of rubber mixtures, such as NBR, EPDM, VMQFPM (viton). Different hardness fabrication is possible.