Grinding Media Shape is very important for grinding performance, most of the researches conclude that balls are better than cones. One of the most important variables is the surface area or string generated by the grinding media, in this way balls and cones have different surface area for same diameter, so when performance is evaluated it must be corrected the surface area for each type of media... 

 

 

Cylindrical grinding media also known as cylpebs have long been replaced by smaller spherical grinding media , as they have been found to be more efficient.