OIL SEAL NBR70 TC 40x72x12

NBR - Acrylonitrile-Butadiene Rubber DIN/ISO 1629 Designation: NBR ASTM D 1418 Designation: NBR Standard Colour: Black Hardness: 70 Shore A Temperature Range: -30°C (-22°F) ÷ 100°C (212°F) Commonly known as Nitrile rubber (NBR) or Buna-N, Acrylonitrile Butadiene Rubber is a copolymer of two monomers: acrylonitrile (ACN) and butadiene. Presently the most widely used and economical elastomer, NBR offers good mechanical properties together with excellent resistance to mineral oil-based lubricants and greases, hydraulic fluids, alcohols and water. NBR provides also a good balance of working properties such as low compression set, high tensile strength, and high abrasion resistance. Its properties are mainly determined by the acrylonitrile content which ranges between 18% and 50%, low ACN contents (<30%) ensure better flexibility at low temperatures, but offer limited resistance to oils and fuels, high ACN contents (>45%) increase resistance to hydrocarbon oils and fuels, but reduce flexibility at low temperatures. The standard NBR material, known as “Medium Nitrile”, offers an average ACN content of approximately 32% and due to its good overall balance suits a wide range of applications. NBR - Acrylonitrile-Butadiene Rubber