The strain acting upon the belt was measured by means of detecting the electrical signal from the strain gauge, contacting with the serrated contact wheel, pasted on the inside belt as mentioned in the 1st report. It was found that as the gauge located on the land of serrated contact wheel, the strain values had been able to evaluate the grinding ability caused by the different surface velocity and the hardness of the serrated contact wheel. In this paper, the ratio of the effective depth of cut to setting depth of cut Z is used to explain the relation between belt tension P acting in grinding as an example. The main results are as follows.
(1) In the various surface profiles and the surface velocities of the serrated contact wheels, P is nearly increased in linear proportion to Z but each tendency is defferent quantitatively.
(2) The relation between P and Z is affected very much with the spring constant because of the relation between the belt tension P' assumed having same spring constant considered various rubber hardnesses and surface profiles of the serrated contact wheels and Z has nearly one proportion.