Used BALL MILLS For Sale from Nelson Machinery. MILL, BALL, 07X07, 1, 7 X 7 MARCY BALL MILL, 125HP. MILL, BALL, 07X08, 1, MAIN GEAR FOR A.C. MILL, 136T. Read More. Buy and Sell Used Ball Mills at Phoenix Equipment. Phoenix Equipment is a global buyer and seller of unused, used and reconditioned Ball Mills.