Electric power tool

1. An electric power tool comprising:

a motor;

a transmission mechanism that transmits a rotational output of the motor to a front-end tool; and

a rotation detector that detects an angle of rotation of the motor, wherein

the rotation detector includes a rotating body attached to a motor shaft of the motor and a position detector that outputs a rotational position signal corresponding to a rotational position of the rotating body,

the rotating body includes an opening, and the motor shaft is press fitted and fixed to the opening of the rotating body, and

a press fitting restriction part that restricts a depth of press fitting of the motor shaft is provided in at least one of the motor shaft and the opening, wherein the press fitting restriction part includes a rear facing end face of the motor shaft that faces the position detector, and the rear facing end face contacts a front facing end face of the rotating body.

2. The electric power tool according to claim 1 , wherein

the rotating body is attached to the motor shaft in such a manner that relative rotation is disabled.

3. The electric power tool according to claim 1 , wherein

the rotation detector is a magnetic encoder, and

the rotating body includes a magnet and a fixing bush for fixing the magnet.

4. The electric power tool according to claim 3 , wherein

the magnet is adhesively fixed to the fixing bush.

5. The electric power tool according to claim 3 , wherein

the fixing bush includes a recess on a fixing surface for fixing the magnet, and

the magnet has a shape fitted in the recess of the fixing bush in such a manner that relative rotation is disabled.

6. The electric power tool according to claim 1 , wherein

the rotating body is attached to the motor shaft at a position in which the rotating body is not in contact with a bearing that supports the motor shaft.