Iron core, stator and electric tool

The utility model discloses an iron core, a stator and an electric tool, the iron core comprises a plurality of punching sheets, and the punching sheets comprise a plurality of first punching sheets, a plurality of second punching sheets and a plurality of third punching sheets which are sequentially stacked together along the axis direction of the iron core. The first punching sheet is provided with a first center hole, the second punching sheet is provided with a second center hole, the third punching sheet is provided with a third center hole, the first center hole, the second center hole and the third center hole share the same center line, the first punching sheet is provided with a plurality of protruding parts protruding into the first center hole, the protruding parts integrally form a boss extending in the axial direction, and the boss extends into the first center hole. And the second punching sheet is provided with a bearing chamber which is located at the outer side of the boss along the axial dir