Rotor in an electric machine

The rotor comprises a shaft (10) having end portions (11, 12) and a middle portion (13) as well as a centre axis (X-X). A plurality of axially (X-X) extending slots (16) are made into a circumference of the middle portion (13). A rod (20) is positioned in each slot (16) and a short circuit ring (31, 32) is situated at each end of the middle portion (13). Each end surface of the middle portion (13) comprises a circular groove (17, 18) extending in the axial direction (X-X) from the end surface into the middle portion (13) and receiving a respective short circuit ring (31, 32). Each end portion of the axially (X-X) extending slots (16) opens into the corresponding circular groove (17, 18), whereby each end of each rod (20) is attached to the corresponding short circuit ring (31, 32).