Patent ID: 7380343

Claim:
A cutting tool comprising: a base which is rectangular in a plane view; a main body provided on the base and having a circular cutting blade which is notatably driven by a motor and a blade case which covers an upper portion of the cutting blade; and a cooling means which leads cooling air from an outside of the main body to cool the motor in accordance with rotation of a fan provided at an output shaft of the motor; and wherein the cutting tool further comprises: a dust collection route which is divided from the cutting blade and provided along a circumference of the cutting blade on an upper side of the blade case; an inlet provided at a division portion between the dust collection route and the cutting blade for allowing airflow generated by rotation of the cutting blade to flow into the dust collection route from a front side of the cutting blade in the cutting direction; an outlet provided at a rear side of the dust collection route in the cutting direction for discharging the air in the dust collection route to the outside of the main body; a guiding means provided with the main body for introducing cooling air for the motor into the dust collection route; an auxiliary inlet at the downstream of the inlet provided at the division portion between the dust collection route and the cutting blade for commumcating the dust collection route with the front side of the cutting blade; and a diverging means by which part of cooling air guided into the dust collection route through the guiding means is discharged to the front end of the base in the cutting direction.