DIY Rock Crusher (recirculating mini sluice box)

This is a hammer mill. 12“ drum powered by a 200cc 4 stroke gas motor. She eats whatever will make it through the input. I’m using four hammers ~ 70 grade steel. V-belt drive, 1/4“ plate and under 100 pounds. I’ve placed a little sluice and head end under the output. 1“ water transfer pump drawing from a four chamber recirculating system. Add 60 L (15 gallons) of water and you’re down to the heavies. Big thanks to the head welder and consult engineer Ry Guy and the boatyard think tank. ...