This machine is designed for the determination of the rebound elasticity of foam materials applied in ASTM D3574, ISO 8307, JIS 6400.
This instrument through a given diameter and the quality of steel ball in the specified height on free falling on the foam sample, calculate the spring back of maximum height of steel ball and ball drop height ratio is the percentage of spring rate, expressed as a resilient rate of foam plastics can rebound resilience.