What is Shore Durometer and Shore Hardness?
The Shore Durometer is a portable measuring instrument used to measure the hardness of non-metallic materials, such as plastics, rubber, elastomers, foams and other similar materials. The Shore durometer is named after its inventor, Albert F. Shore, who developed it in the 1920s.
The Shore Durometer measures a material's resistance to permanent deformation by pressing a specifically shaped indenter against the surface of the material. The Shore durometer is used to measure the hardness of a material on a numerical scale, known as the Shore hardness scale.
SHORE HARDNESS SCALES
There are several Shore hardness scales used in industry to measure the hardness of different types of non-metallic materials. The two most common scales are the Shore A scale and the Shore D scale.
SHORE A SCALE
The Shore A scale is used to measure the hardness of soft, flexible materials, such as rubber, elastomers, and foams. The Shore A scale has a graduation from 0 to 100 hardness units.
SHORE B SCALE
Used to measure the hardness of soft materials such as wax and soap.
SHORE C SCALE
Used to measure the hardness of hard materials such as rigid plastics and epoxy resins.
SHORE D SCALE
Used to measure the hardness of harder materials such as plastic and thermoplastic elastomers.
SHORE DO SCALE
used to measure the hardness of very hard materials such as fiberglass reinforced plastics.
SHORE OR SCALE
used to measure the hardness of very soft materials such as foam rubber.
To use the Shore durometer, the indenter is placed on the surface of the material to be measured, a constant force is applied, and the depth of the resulting indentation is measured. The depth of the indentation is used to determine the hardness of the material on the corresponding Shore scale.
The Shore A durometer is commonly used in the industrial caster industry to measure the hardness of materials from which wheels and casters are made. Hardness is an important factor to consider when selecting a wheel or caster, as it affects the ability of the wheel or caster to support load, roll smoothly, and protect the floor.
SHORE HARDOMETER ON WHEELS AND TIRES
Industrial wheels and casters are used in a variety of applications in different industries, from logistics to manufacturing. The Shore A and D durometer measurement is a way to measure the hardness of industrial wheels and casters and determine their ability to withstand loads and resist abrasion.
Wheels and casters with a larger size on the Shore scale are harder and less deformable, making them ideal for applications where greater load capacity and abrasion resistance are required. Wheels and casters with a smaller size on the Shore scale are softer and more deformable, which makes them suitable for applications where greater cushioning capacity and load protection are needed.
It is important to note that the Shore durometer measurement is not the only consideration when choosing industrial wheels and casters. Other important factors include size, mounting type, load capacity, and compatibility with the surface they will be used on.