Three views of the Grinder. The rectangular frame on top supports a wooden hopper, not shown. The platform below supports a container to catch the ground biochar. A screen placed over the container catches larger, unground pieces which are removed or dumped back into the hopper for finer grinding. Hopper and container are extra. Electric motor power is possible.
Front view showing hand crank
Back view showing gears
End view showing drum spring tensioners
No longer making this.