Comminution device for product for comminution such as memory cards, mobile terminal apparatuses or the like, wherein - the comminution device has a comminution unit which has two interacting cutting rollers (28a, 28b) that are rotatably driven in mutually opposite rotational directions, each having mutually intersecting cutting discs (29a, 29b) that are disposed in an alternating manner and form a cutting gap; - the cutting discs of the one cutting roller each engage in an annular groove between adjacent cutting discs of the other cutting roller; - the cutting discs (29a, 29b) have cutting edges on the external peripheral edges; - the cutting discs (29a, 29b) along the external circumference have a plurality of teeth (30a, 30b), each having one tooth tip and one tooth blade (31a, 31b) on the tooth tip; - the comminution device has an infeed having an infeed track for the product for comminution to the comminution unit, so as to offer up in a self-acting manner the product for comminution above the comminution unit; - the infeed track terminates above the comminution unit, or above the cutting gap, respectively, wherein an elongate piloting device is disposed below the end of the infeed track and above the comminution unit; characterized in that - the tooth blades (31a, 31b) of the cutting discs (29a, 29b) are aligned such that during operation of the comminution unit upon rotation of the cutting rollers (28a, 28b) they each lie beside the tooth blades of the other cutting roller and thereby mesh; - the piloting device extends across a length of at least 30% of the length of the cutting rollers (28a, 28b), and herein slopes downward in the longitudinal profile thereof from a fastening on the comminution device or in a guide duct, respectively, to the free end of the former. - the comminution device has a comminution unit which has two interacting cutting rollers (28a, 28b) that are rotatably driven in mutually opposite rotational directions, each having mutually intersecting cutting discs (29a, 29b) that are disposed in an alternating manner and form a cutting gap; - the cutting discs of the one cutting roller each engage in an annular groove between adjacent cutting discs of the other cutting roller; - the cutting discs (29a, 29b) have cutting edges on the external peripheral edges; - the cutting discs (29a, 29b) along the external circumference have a plurality of teeth (30a, 30b), each having one tooth tip and one tooth blade (31a, 31b) on the tooth tip; - the comminution device has an infeed having an infeed track for the product for comminution to the comminution unit, so as to offer up in a self-acting manner the product for comminution above the comminution unit; - the infeed track terminates above the comminution unit, or above the cutting gap, respectively, wherein an elongate piloting device is disposed below the end of the infeed track and above the comminution unit; - the tooth blades (31a, 31b) of the cutting discs (29a, 29b) are aligned such that during operation of the comminution unit upon rotation of the cutting rollers (28a, 28b) they each lie beside the tooth blades of the other cutting roller and thereby mesh; - the piloting device extends across a length of at least 30% of the length of the cutting rollers (28a, 28b), and herein slopes downward in the longitudinal profile thereof from a fastening on the comminution device or in a guide duct, respectively, to the free end of the former.