Rubber Hardness Measurement

To evaluate elastomers quality vulcanisation ratio or even the wear resistance it is necessary to check the hardness.

Rubber hardness measurement.

In order to measure hardness a rubber hardness scale is used. Once the gauge is pressed firmly against the material and the needle has penetrated as far as it can go the measurement needle will indicate the corresponding hardness measurement. Durometer is a dimensionless quantity and there is no simple relationship between a material s durometer in one scale and its durometer in any other scale or by any other hardness test. The hardness has a direct impact on the stiffness of a part ultimately affecting how a component will perform in an application.

There are special tools to position the measuring needle exactly in the middle. Shore durometer hardness is a measure of the resistance a material has to indentation. So i sent him photographs that showed different ways of holding a durometer and using it to measure the hardness of a rubber roll. The measurement must be redone with adjacent scale type.

Named after its inventor albert ferdinand shore shore hardness offers different scales for measuring the solidity of different materials shore was born in 1876 and lived until 1936 creating the shore scale in the 1920s. The most commonly used method is the shore a measurement. High quality foam rubber hardness shore durometer measurement 2 5 mm needle stroke dial from china china s leading digital rubber hardness tester product with strict quality control durometer hardness unit factories producing high quality durometer hardness unit products. Measuring by pressing manually onto a rubber part in order to feel its resistance can seam.

Otherwise deviations can easily occur on a convex surface. As such an incorrect way to take a measurement of hardness would be if the base of the durometer or the base of the tool was actually not parallel to the axis of the roll or the shaft that s holding the roll. The rubber durometer chart below gives you an idea of the rubber hardness that you want for your application. Determining the shore a hardness of rubber.

Generally most rubber materials fall under the rubber durometer scale of shore a. This measurement follows the. This comparison guide will provide an overview of the different scales that can be used. Thus if you need a rubber or o ring durometer that feels like a running shoe.

A durometer scale is a type of measurement for rubber material hardness. The needle is placed against the rubber or plastic and pressure is applied.