ASTM D (D ) covers multiple properties of O-Rings. Part of the specification includes tension testing for determining the breaking. AMS and MIL-R Type 1 Class 1 Typical Values. Hardness, Shore A, ASTM D 90 ±5. Tensile Strength, psi, ASTM D min. ASTM D Standard Test Methods for Rubber O-Rings.
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Consideration needs to be made for the fixture geometry spool separation and diameter as well as specimen geometry. Cracking, flaking, general brittleness, and other characteristics can appear in the rubber O-rings when they are exposed to temperature cycles and solar radiation.
Subscribe to Instron News! Static rubber rings are used for gas sealing and specialized applications including vacuums. The rotation keeps localized stress moments on the sample to a minimum. v1414
Email addresses must contain the symbol. Fixture – The standard specifies a fixture consisting of two spools to hold an o-ring while under test.
Pre-canned test methods are also available for both o-ring and straight specimens to make setup time faster and easier.
Email addresses can only contain letters, numbers and the following special characters: The fixture can use interchangeable rollers at different sizes. Specimen gripping Specimen slippage Calculations Our solutions: The challenges of testing to this standard: Software for Series Systems. Next Checking to see if you are a returning visitor…. Bluehill LE for Basic Testing. Our Series Elastomeric “O” Ring Test Fixtures were designed to accurately meet the requirements, and conveniently avoid e1414 need for lubricants or external power motors.
ASTM D – 15 Standard Test Methods for Rubber O-Rings
Concrete, Asphalt and Rock. The upper spindle rotates freely and the rotation frequency of the lower spindle is easily selected by moving the toothed belt from one pulley to another. The fixture ships complete with a power adapter for both US and International power outlets.
The versatility of an O-ring allows it to function in multiple modalities.
ASTM D1414 Rubber O-Rings
ASTM D specifies the procedures for determining the physical properties of o-rings. Rings under tension in high temperature environments can experience something called the Gough-Joule effect where they tend to contract in this scenario.
Some advanced calculations including d1144 modulus can also be derived from the data. Subscribe to Our Newsletters. These materials tend to elongate extensively so attention must be made to the total stroke of the tensile tester.
In some cases, Instron elastomeric rubber grips have also been found to work well.
ASTM D – Rubber O-Ring Testing Fixture
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Designed for testing elastomeric materials in the form of rings, xstm fixtures avoid local stress concentrations by using a lower spindle that is rotated by a toothed belt driven from the moving crosshead.