Durometer Measurement of Gasket Material Hardness

November 9, 2020

The hardness of elastomeric gasket materials is estimated with a durometer. Knowing how this gadget is utilised aides in deciphering determinations and choosing gasket material. The following is an outline of durometer measurement of gasket material hardness.

The Basics of Durometer Construction

Durometers come in two structures, simple and advanced. Simple durometers resemble the conventional stopwatch with a solitary hand that clears around the dial. This dial is mounted on a level foot, from which juts a pin. The pin is spring-stacked, so when the foot is squeezed against the gasket material the pin climbs into the body of the durometer. The harder the material, the more the pin moves into the body. Or on the other hand to put it another way, softer materials let the pin press in more profound. The dial is set apart from zero to 100. These numbers have no units except for are identified with the spring load and the size and state of the top of the pin, all the more appropriately called the ‘indenter.’

Durometer Measurement of Shore Hardness

Spring quality and indenter calculation are indicated in ASTM standard D2240. This fixes each part of elastic hardness testing, including the size of the ‘presser foot’, test arrangement, the term for which the indenter is squeezed into the material, and count and introduction of results.

Elastic and elastic like materials can shift hugely in hardness, so ASTM D2240 characterizes various scales. Each scale has its own indenter structure and spring load. Gasket materials are normally estimated on the Shore A scale. The ‘A’ indenter is a pin of 1.27mm (0.050″) measurement, tightened at 35 degrees to complete as a shortened cone with a level territory of 0.79mm (0.031″) width. At a perusing of 100 (no space,) the spring power will be 8.05 Newtons.

Durometer Measurement in Deciding the Hardness Number

As indicated by ASTM D2240, the test example ought to be at any rate 6.0mm (0.24″) thick. Hardness is determined as the mean or middle of five measurements taken in any event 12.0mm (0.48″) from any edge.

A Comparative Measure in Durometer Measurement

Being dimensionless, the Shore A number reveals to you about the properties of an individual material. Its genuine worth is as a government sanctioned test strategy, permitting correlation of elective materials for elastomeric gaskets.

Consult VSRP for more information on durometer measurement of gasket material hardness. We ensure consistent and reliable quality of rubber products so your business can rely on the products you source. If you find it important to have products produced to your specifications, it’s reassuring to know that VSRP control tooling and retain ownership. Our manufacturing partners are always able to meet your exact needs.

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