The present invention, in particular for compressing at least some of the areas the gear cutting of gear 5, in order to form the gear-cutting of coronary on gear 5 by the rollover structure, in the rolling tool 2, rolling tool 2, for meshing to gear cutting in of gear 5 to be rolling, with a tool tooth 7 projecting radially outward, it has a tool body 6, tool tooth 7, in the area of ​​the tooth side, the axial direction It is formed in a concave shape coronary in at least some of the region to, on rolling tool 2. The present invention includes a separate tool for forming the gear cutting of the coronary, apparatus, method and gears.