The balling process involving the forcing of an accurately milled tungsten carbide ball of a prescribed diameter through a slightly undersized hole is a relatively new micro-finishing process. Although balling equipment has been marketed, very few reports on the process have been published; Of these, Prokuryakov et al. In the present study of friction at low speed, tungsten carbide balls of various diameters in brass, aluminum and steel were used. Surface finish, roundness and forces were measured. With the large volume of data collected, multiple linear regression techniques were used and empirical relationships were established. Optical and scanning electron microscopy were used for surface integrity studies.