Jar Mills for Grinding Wet/Dry Sample Materials - Gilson Co.- drive calculation for a ball mill jar ,Jar Mill, 1 Tier is a bench style Jar Mill that accommodates one or two jars. Maximum feed capacity is 12.5L Maximum feed capacity is 12.5L Jar Mill, 2 Tier floor model accommodates one or two jars.how to calculate the primary drive for a ball millBall Mill Design/Power Calculation. The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in …