Make a Ball Mill in 5 Minutes: 4 Steps
Their small ball mill cost between 70 and 80 dollars. For no more than 30 and in 5 minute you can build a ball mill of appreciable performance. ... A rugged container (You can use PVC pipes or big plastic bottles) 2. An electric screwdriver (these are fairly cheap, I got mine for 10) 3. A bolt, a nut and maybe a washer.