A Durometer is an Instrument used to gauge the hardness of various plastics and rubbers dependent on the thickness of an indentation in the material being tested. The depth of the indentation is established using a specific force on a standardized strain and ends in a durometer hardness reading.
Using a Durometer is regulated by ASTM D2240 Standard Test Method for Rubber Property — Durometer Hardness. This specification enables a measurement of hardness and also the indentation hardness after a given period of time, shot in a consistent fashion, and with no shock. There are twelve kinds of durometer hardness dimensions given in ASTM D2240 according to material type and hardness.
Since rubber mounts barely have a flat Surface, it’s extremely challenging to obtain a precise and repeatable durometer hardness reading. It is hard to discover a surface onto a rubber mount that conforms to the criteria given in ASTM D2240.
Because of This, the engineers in LORD Prefer having a spring speed worth, also referred to as load-deflection analyzing, instead of a durometer hardness value after defining the stiffness of a plastic bracket. There are lots of circumstances where true readings aren’t possible with a durometer. Furthermore, little surface deformations seldom connect to the capability of a rubber bracket to be planned in its program, which can be a significant aspect to consider here digital force gauge.
LORD urges static load-deflection Testing to verify the stiffness of a rubber mount. In static load-deflection testing, confirmed load is applied at a specified deflection in compression or from shear to ascertain the spring rate that’s normally in newtons per millimeter (N/mm). The two load-deflection analyzing and durometer testing supply data but performing a static load-deflection evaluation to ascertain a spring speed is quite a bit more indicative of how a rubber mount will execute in an application.
There’s no correlation between the Durometer reading and the physical size and form of the part you are measuring. However, should you use a spring speed evaluation, then you can zero in on the Specifics — a far more precise means of determining the correct part to your application.