Shore Hardness or Durometer is one of several measures of the hardness of a material. Hardness may be defined as a material’s resistance to permanent indentation. The durometer scale was defined by Albert Ferdinand Shore who developed a device to measure Shore hardness in the 1920s. The term durometer is often used to refer to the measurement as […]
O-Ring Material Issues. Recently, we shared the three most common O-Ring design flaws. By identifying potential problems like insufficient gland volume, high tolerance levels and over compression, engineers can resolve potential O-Ring issues before they happen. Choosing the proper material is as crucial to the success of an O-Ring as the design. Key questions must be […]
O Ring History The first patent for the O-ring, is dated May 12, 1896 as a Swedish patent. J O Lundberg the inventor of the O-ring, received the patent. The US patent for the O-ring was filed in 1937 by a then 72-year-old Danish born machinist, Niels Christensen. Soon after emigrating to the USA in 1891, he patented […]
Encapsulated O Rings Encapsulated O Rings are used in chemically aggressive environments. Depending on the core choice encapsulated either Silicone or Viton a working temperature range of -15 to +200 degrees C is achievable. Another advantage of FEP is that it has a very low coefficient of friction. Download Specs
Market News Global nitrile butadiene rubber market set for rapid growth, to reach around £346 million by 2020 according to a new research report. Nitrile-butadiene rubber is a complex family of various butadiene monomers and unsaturated copolymers. Its chemical and physical properties vary based on the polymer’s composition of nitrile. This form of synthetic rubber is […]
Main elements of a mechanical seals All mechanical seals are constructed with the following basic sets of parts: A set of (very flat) machined and lapped primary sealing faces: The very close (near) contact between these two flat mating surfaces, which are perpendicular to the shaft, minimizes leakage. Dissimilar materials are usually used for the […]
Years of experience have been captured in a plethora of O-rings design standards and a wealth of materials is readily available to suit most application requirements. Mick Holland describes how to take advantage of these standards to mitigate risk when specifying O-rings into your fluid sealing system. Within the O-ring industry, size references are often […]
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