Influence of workpiece position on roundness error and surface finish in centreless grinding

Abstract Centreless grinding is carried out with workpiece centre above the line joining the centres ofgrinding and control wheels. When a workpiece has a slight bend or a projection on the surface, it is safer to grind below the centres. This paper analyses the process of grinding above and below the centres. The results show that the roundness error increases only by a few microns when ground below the centres and the change in the surface finish is insignificant.