Tel 0086-731-84939972. Fax 0086-731-84939973. Mobile 0086-13357214760. Email1 [email protected] Planetary Ball Mill. Dual Planetary Ball Mill. Cryogenic Planetary Ball Mill. Vertical Planetary Ball Mill for Glove Box Use. Heavy-duty Full-directional Planetary Ball Mill.For example, 5mm media are used in many attrition mill applications, whereas 10-15 mm may be a good start for a lab ball mill. For small-media mills, media sizes are typically smaller than 2 mm. Another important criterion in selecting media size is the gap size between stirring arms and mill walls.