Sl No Parameters Range of Variables
1 Time of grinding 2, 3, 4, 5 and 6
2 Mill speed 23, 41, 66 and 82 rpm
3 Size of balls 1", 1/2", 1/3" and 1/4"
4 Quantity of feed 50, 100, 150, 200, and 300
5 Feed size –1/2" + 1/4"
–1/4" + 1/8"
–1/8" + 1/16"
–1/16" + 1/32"
Table 1: Range of variables considered.