Caster casters office chair casters furniture casters wheels material characteristics 

 Compressive strength 

 Compression test, the specimen is exposed to the maximum compressive stress, the banknote MPa. 

 Hardness 

 Used to measure the hardness of rubber and other tire and wheel core material, Shore "A" or "D". 

 Elongation 

 The role of the tension specimen fracture distance between the markings increase the amount of the initial gauge ratio, expressed as a percentage. 

 Impact strength 

 Material subjected to free fall heavy loads imposed by the violent impact performance. Inch / lb ft / lbs, or the test temperature of punching power to represent. 

 Resistance to deformation under the weight of 

 Variable became pale and flat in the long heavy wheels with location, the test sample to withstand the hydrostatic load, load shed after the end of the specified loading time, the wheels with the location change table height and compared to the original height percentage. 

 Caster casters office chair casters furniture casters operating temperature 

 Measured under the rated load operating temperature range. 

 Adhesion 

 Tire from the wheel core bonded above 6 inches / minute peel force required to pounds of tires as a unit divided by the line width. 

 Tensile strength 

 Wheels from the cross-sectional fracture when the force required. In pounds divided by the sample cross-sectional area (square inches). 

 Water absorption 

 The increase in the weight of the test sample. Expressed in percentage of the sample weight in the test after a particular program and the initial weight 
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