The chipper 660 series can be supplied with an award winning collapsible counter-blade mounted on a running slide and secured with adjusted shear bolts.


Whenever a hard body is accidentally entered into the chipper, the bolts are sheared and the counter-blade falls down, so that the foreign body exits before causing damages.


A foreign body is accidentally introduced into the chipper


Chipper without foreign body protection


Chipper provided with collapsible counter-blade


Example of a steel hinge introduced and ejected from a Pezzolato wood chipper with collapsible counter blade.