Roller tappet

The shaft (1) has a cabinet (2) whose inner jacket (3) passes through a bridge piece (4). A storage unit (6) for a cam approach roller (7) is provided at a driving end face surface (5) of the cabinet. A driving end (10) of the cabinet is represented as a closed ring that projects over a half height of the cam approach roller. Foreheads (11) of the cam approach roller are provided at the inner jacket, where each forehead is provided with a center hole (13). A pin projecting from the inner jacket is inserted into the center hole when the restraining units are extended.