I am looking for ideas for some kind of device that I could build from simple elements (wood, stainless steel screws, bolt for axle) and possibly some woodworking (I have a router) in order to assist me crush chicken bones.
I like this device:
but I was thinking of something more agressive, by having the screws protrude more from the rotor, and another layer of screws on the vertical panel to provide a good shredding action, and a high torque with the help of reduction gears. Would this be a good starting point ? I'm not sure which force is required to break chicken bones..