Connecting rod 2 has collar c encircling eccentric 1 which rotates about fixed axis A. Rocker arm 3 is designed as a member with ball-shaped ends which fit into spherical recesses C and D in connecting rod 2 and in the fixed link. Eccentric 1 drives connecting rod 2 which carries crushing surface a. This surface has a simultaneous crushing and abrading action on the material placed in space b between the jaws. The fineness of crushing is regulated by wedge mechanism 4 which varies the position of point D. Spring 5 absorbs dynamic forces (shocks) in the operation of the mechanism.
$896$LW,FD$