| 摘要 |
The device has a motor part comprising a cylindrical housing (8) in which an electric motor i.e. sealed high-frequency electric motor (11), is positioned for driving an active head part accommodating a grinding and sanding tool i.e. sanding grind wheel. A suction pipe (6) is connected to a suction device. The suction pipe is opened in the housing of the motor part. The electric motor is positioned in central part of the housing such that sucked-in air circulates around a body of the motor. A guiding unit i.e. helical fin (16), guides the air around and along the body of the motor. |
