In this paper, for the purpose of clearing the elastic behavior and the elastic contact between the contact wheel and the workpiece in the cylindrical grinding by the coated abrasive belt, the amount of its radial expansion, the depth of over cut and the normal stress distribution on the contact zone are analyzed experimentally. The cylindrical plunge grinding is applied and the stress distribution on the interface is analyzed by the photoelastic coating method. Main results obtained are as follows :
(1) The amount of radial expansion of the contact wheel with the centrifugal force increases exponentially from the center of it towards end, and its peripheral surface is in concave. The experimental results of the depth of over cut approximately agree with the values calculated by introducing the apparent modulus of dynamic elasticity of the composite (of coated abrasive belt and contact wheel) into the theory of the amount of radial expansion.
(2) The normal stress distribution applied to the cutting edge on the coated abrasive belt has a parabolic form for the various contact wheels in the state of rest or grinding.
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