Electric tool

[0016] Embodiments of the present invention will be described below based on the drawings.

[0017] Fig. 1 is a longitudinal sectional view of an example of an electric tool, that is, a grinder, and Fig. 2 is a plan view, and the grinder 1 is configured as follows: in front of the motor housing 2 (left side of Fig. A gear case 7 is assembled to a bearing plate 6 that pivotally supports the rotor 4 of the gear motor 3, and a rear cover 8 is assembled behind it. Here, the motor casing 2 and the rear cover 8 are made of synthetic resin, and the gear case 7 is made of metal.

[0018] In the gear box 7, the output shaft 9 of the rotor 4 protruding into the gear box 7 is perpendicularly supported to the main shaft 10, and the first bevel gear 11 fixed to the front end of the output shaft 9 is integrally fixed to the main shaft 10 through the first bevel gear 11. The meshing of the second bevel gear 12 can transmit the rotation of the output shaft 9 to the main shaft 10 . A disc-shape