Ball Mills vs Rod Mills | AM King Industries, IncIn a ball mill the actual balls in the machine need to cascade in order for the grinding to be accomplished. Because of this more energy is needed to power up a ball mill as opposed to a rod mill. Rod mills can be operated at lower peripheral speeds resulting in reduced energy costs. Though this difference in power can vary.vs electric grinder rod ball mill,ANALYSIS OF EFFICIENCY OF GRINDING IN BALL AND ROD .grinding medium contents, sort of grinding medium and its size and parameters of the feed being comminuted what means particle size distribution including maximum size of particle and fine particles contents as well susceptibility on comminution. The paper contains the analysis of efficiency of ball and rod mills works.