This metric O Ring set is made of Black Buna N has a durometer of 90A and includes 391 pieces covering 30 dash siz The rings have a Round cross section and can be used across a wide temperature range from 40 degrees F 40 degrees C to 212 degrees F 100 degrees C The hardness of rubber o ring compounds are measured by the Shore A durometer the higher the durometer the harder the compound 70 durometer hardness should be used whenever possible as it offers the best combination of properties for most o ring applications Durometer Shore A scale is a type of measurement for rubber material hardness
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Rex Gauge Company has been a leader in the durometer hardness gauge industry for over 70 years Our durometers are made in the USAThe Shore durometer is a device for measuring the hardness of a material typically of polymers elastomers and rubbers Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials Lower numbers indicate less resistance and softer materials
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Sep 20 32 The hardness of rubber O rings are measure by the Shore A durometer the higher the durometer the harder the compound In general 70 durometer hardness should be used whenever possible as it offers the best combination of properties for most o ring applications Why is Shore A Hardness Important O Ring Durometer vs Pressure Clearance Gap Groove Deisgn Chart Engineer Assistance Material Selection Design Fast Expert Quality Service
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In the O ring industry another hardness scale is used due to the curved surface of the O ring cross section causing problems with accurately reading Shore A The scale is IRHD International Rubber Hardness Degrees The size and shape of the indentor used in IRHD readings is much smaller thus allowing for more accurate measurements on curved Metric O rings are usually defined by the internal dimension x the cross section Typical part number for a metric O ring ID x CS material shore hardness 2x1N70 = defines this O ring as 2mm id with 1mm cross section made from Nitrile rubber which is 70Sh BS O rings are defined by a standard reference
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Viton Orings have exceptional resistance to high temperatures up to 200 176 C and aggressive fuels chemicals Viton is now commonly used on O rings as well The Shore durometer is a device for measuring the hardness of a material typically of polymers elastomers and rubbers Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials Lower numbers indicate less resistance and softer materials
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The Analog Complete O Ring Hardness Kit is the most convenient and accurate way to perform repeatable hardness durometer testing on thin materials as thin as 030 The OTK AN is comprised of the following items Model RX M Type M Analog Durometer with Certification ORF 1 O Ring Fixture Kit 1/16 3/32 1/8 3/16 1/4 Shore hardness especially Shore A and Shore D is commonly used for determining foam hardness soft plastic hardness and rubber hardness like in rubber o ring testing Because of the popularity of the Shore hardness method a durometer is often referred to as a Shore durometer
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O Ring No Metal Detectable No X Ray Detectable System of Measurement Inch Cross Section Shape Round O Ring Material Buna N Durometer Hardness Rating Very Hard Nominal Inside Dia 1 3/4 In Nominal Width 3/32 In Actual Inside Dia In Actual Width In Dash Number 132 Color Black Durometer 90 Shore A Meets/Exceeds ASTM D NBR 90 Nominal Outside Dia 1 15/16 This PTFE O ring has a shore durometer of 55D Shore durometer is the hardness of a material and its resistance to permanent indentation A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100 with 100 indicating no indentation
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Elastomer Properties Hardness The hardness of an elastomer is measured based on the depth of indentation by a standard size and shape impacting gauge The hardness is obtained by comparing the difference between a small initial force and a much larger final forceIt is expressed in pounds per square inch psi or MPa Mega Pascals This is actually the elastic modulus of the material The higher the modulus of a compound the more apt it is to recover from peak overload or localized force and the better its resistance to extrusion Modulus normally increases with an increase in hardness
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Get durable Buna N and Viton O rings from Grainger to help tightly seal connections in a wide range of industrial applications Buna N rings with durometer 70 shore A can offer hood physical properties and provide excellent resistance to petroleum productsSUNRING INDUSTRY INC O ring Rubber O ring AS568 Orings Rubber Parts NBR Oring Silicone Oring solvent resistance tester，sulfur rubber solvent resistance tester automatic hardness tester QUALITY GUARANTEE Learn More gt >Material Diversity ASTM
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We utilize O Ring compounds formulated to meet the most stringent industry standards including FDA USP KTW DVGW BAM WRAS WRC NSF Underwriters Laboratories UL Aerospace AMS and many customer specific requirementsThe hardness of rubber compounds is measured by Shore A durometer the higher the durometer number the harder the compound Wherever possible 70 durometer hardness should be used as it offers the best combination of properties for most O ring applications Softer compounds stretch easier and seal better on rough surfac
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Technical Handbook O rings O ring Hardness The hardness of an O ring is important for several reasons The softer the elastomer the better the seal material conforms to the surfaces to be sealed and lower pressure is required to create a seal This is particularly important in low pressure seals that are not activated by fluid pressureDurometer Shore Hardness Tester for Rubber Plastics and Soft Elastic Materials Qualitest provides quality control departments and research laboratories with an extensive range of top quality Durometer and hardness Tester for accurate hardness determination on all natural and synthetic rubber products and soft elastic materials plastics acrylic glass acetates casting resin polyester
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Technical Handbook O rings O ring Hardness The hardness of an O ring is important for several reasons The softer the elastomer the better the seal material conforms to the surfaces to be sealed and lower pressure is required to create a seal This is particularly important in low pressure seals that are not activated by fluid pressureGeneral Engineering Menu O Rings Suppliers Molded O Rings Servic The following chart gives the load required to compress a 070 diameter o ring with respect to percent compression of diameter and the applicable hardness Shore A scale
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