Abstract: The invention discloses an impact shears having a rotor with individual chopping blades disposed on the rotor in a predetermined arrangement and with blade(s) or blade system that is generally stationary vis-à-vis the rotation of the rotor. The blade is held in a blade holder on the stator side of the rotor. The blade holder is movable on the stator about an axis parallel to the rotational axis of the rotor and carries at least two blades, or blade systems, that are expediently disposed at the same angular distance to one another. The blade holder can be rotated about an axis that extends parallel to the rotational axis of the rotor so that every blade of the blade holder can be brought in a cutting position to interact with the chopping blades of the rotor and can be locked in position with respect to the chopping blades.

Abstract: A shredder includes a cutting unit frame and a cutting shaft rotatably supported in the cutting unit frame and carrying a multiplicity of cutting disks, rotatable with the cutting shaft for shredding an item in cooperation with a further tool. The cutting unit frame has two opposing side parts extending parallel to the cutting shaft and two fronting parts extending transversely to the side parts and the cutting shaft. Each fronting part has upper and lower fronting part elements attached to one another and extending between and separately attached to the side parts and internally capturing one of two bearings therebetween such that the bearings rotatably mount the cutting shaft in the cutting unit frame and are removable with the cutting shaft upon removal of only the upper fronting part elements from the cutting unit frame without bringing the cutting unit frame out of adjustment.

Abstract: The invention discloses an impact shears having a rotor with individual chopping blades disposed on the rotor in a predetermined arrangement and with blade(s) or blade system that is generally stationary vis-à-vis the rotation of the rotor. The blade is held in a blade holder on the stator side of the rotor. The blade holder is movable on the stator about an axis parallel to the rotational axis of the rotor and carries at least two blades, or blade systems, that are expediently disposed at the same angular distance to one another. The blade holder can be rotated about an axis that extends parallel to the rotational axis of the rotor so that every blade of the blade holder can be brought in a cutting position to interact with the chopping blades of the rotor and can be locked in position with respect to the chopping blades.