| 摘要 |
In order to provide an electric tool that has improved motor cooling efficiency, a universal motor 3 provided on a portable circular saw 1, which is the electric tool, comprises an output shaft 31, a cooling fan 32 that is affixed to the output shaft 31, an armature 6 that is affixed to the output shaft 31, and a stator 7 that is provided with a facing surface 71D that faces the armature 6 in the radial direction of the output shaft 31. The facing surface 71D is provided with a cooling groove 71a which is recessed in the radial direction of the output shaft 31, and which extends in the axial direction of the output shaft 31. |
