What performance parameters should you pay

attention to when selecting casters?
Casters have many performance parameters, which are also important indicators when selecting

casters. Let's take a look at them one by one.
1. Adhesive force
The force required to peel the tire from the bonded wheel core at a speed of 6 inches per minute is

calculated in pounds divided by the linear width of the tire.
2. Tensile strength
The force required when the wheel breaks from the cross section. In pounds divided by the area of

the cross-section of the sample (square inches).
3. Elongation
Under the action of tensile force, the ratio of the increase in the distance between markings to the

initial gauge distance when the sample is broken is expressed as a percentage.
4. Impact strength
The ability of materials to withstand the violent impact imposed by free falling heavy objects. It is

expressed in inches / pounds, feet / pounds or stamping work at test temperature.
5. Deformation resistance under heavy pressure
Under heavy load for a long time, the wheel landing position becomes larger and flattened, that is,

the test sample bears a certain static pressure load, and then the load is removed after the specified

compression time. The percentage of the height of the wheel after landing position change compared

with the original height.
6. Water absorption
Increase in the weight of the test sample. It is expressed as a percentage of the weight of the sample

after being tested by a specific procedure and the initial weight.
7. Operating temperature
Operating temperature range measured at rated load.
8. Hardness
It is used to measure the hardness of rubber and other tire and wheel core materials, expressed by

shore "a" or "d". Compressive strength the maximum compressive stress borne by the specimen during

the compression test, in megapascals.

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