Abstract
Spin angle controlled ball lapping method developed recently is to have an excellent performance to lap the ball, in which V-groove lapping plates are separated into two parts and three plates are able to rotate independently. Present paper focuses on an effect of degradation of grain size on finishing characteristics of steel ball, in which polishing is conducted using vesicant polyurethane pad. It is found that degradation of grain size has some influence on surface roughness decrease of the ball. Experiments indicate that stock removal rare of the ball is dependent upon the grain size.
