kjavanb123
Well-known member
All,
After reading posts related to ball mill, I finally decided to get in the action and build one. This is a copy from design by samuel-a.
The mill diameter is 21cm(8.26 in), the polly or is it puly that decrease the rpm is 25cm (9.84 in), and the polly attached to washing machine motor is 4cm(1.57 in). The motor has 2 speeds, 450rpm and 3000 rpm, I set it to 450rpm, then attach it to the polly, but it did not produce the speed and the balls just stay down the bucket, so I switched to 3000rpm, and still did not move that much, is there any formula to what types of balls to use and how many?
![image.jpg image.jpg](https://cdn.imagearchive.com/goldrefiningforum/data/attachments/17/17511-8a6d1260a0f9360788b672e68dabc432.jpg)
Thanks
Kevin
After reading posts related to ball mill, I finally decided to get in the action and build one. This is a copy from design by samuel-a.
The mill diameter is 21cm(8.26 in), the polly or is it puly that decrease the rpm is 25cm (9.84 in), and the polly attached to washing machine motor is 4cm(1.57 in). The motor has 2 speeds, 450rpm and 3000 rpm, I set it to 450rpm, then attach it to the polly, but it did not produce the speed and the balls just stay down the bucket, so I switched to 3000rpm, and still did not move that much, is there any formula to what types of balls to use and how many?
![image.jpg image.jpg](https://cdn.imagearchive.com/goldrefiningforum/data/attachments/17/17511-8a6d1260a0f9360788b672e68dabc432.jpg)
Thanks
Kevin