Abstract <p>For the diamond grinding of silicon nitride ceramic balls based in a groove with circular feed under oscillation, the results of experimental study on the effect of the processing regime on the accuracy of their shape and the shape of the worn surface of a diamond wheel were reported. The shape accuracy criteria were the diameter variation and out-of-roundness profile shape factor for the ground balls and the radial slope angle and curvature coefficient of the working surface profile for the worn surface. This effect was described as adequate linear functions of process parameters from the rotation speed of a diamond wheel and the feed speed of balls. The kinematic parameters of processing, at which the studied ball grinding scheme was reasonable to apply, were determined.</p>