ELECTRIC MOTOR

摘要

The purpose of the present invention is to obtain an electric motor (50) which enables an improvement in environmental friendliness while preventing the increase of the total length thereof. An electric motor (50) is the electric motor (50) provided with a shaft portion (2) rotating about a rotating shaft (S), and a casing (1) housing at least part of the shaft portion (2). In the casing (1), a through-hole (6) formed in a position overlapping the rotating shaft (S) is formed. The through-hole (6) is closed by screwing a setscrew (9) thereinto. An O ring (13) is inserted between the casing (1) and the setscrew (9) to prevent the entry of water and dust into the casing (1).