Patent ID: 7874075

Claim:
A portable cutting machine comprising: a housing; a motor housed in the housing; a cutting blade adapted to be driven by the motor to cut to-be-processed members; a saw cover attached to the housing to cover approximately the half of the outer periphery of the cutting blade; a base adapted to rotatably support the saw cover or the housing and to be brought into contact with the to-be-processed members; and a protrusion amount changing mechanism capable of changing the amount of protrusion of the cutting blade from the base toward the side opposite to the saw cover, wherein the protrusion amount changing mechanism has an adjustment guide extending from the base in the rotation direction of the saw cover and a movement restricting part for restricting the movement of the adjustment guide with respect to the saw cover, wherein the portion of the adjustment guide on the side farther from the base with respect to the movement restricting part is arranged outside of the saw cover, and wherein the saw cover comprises: an opening portion formed on a surface of the saw cover farther from the motor; an air passage communicating from a front of the cutting blade in the cutting direction of the cutting machine to the opening portion: and a guide portion formed in the air passage in the vicinity of the opening portion so as to guide air being generated by a rotation of the cutting blade and flowing into the air passage toward the opening portion, and wherein the portion of the adjustment guide on the side farther from the base with respect to the movement restricting part is accommodated within a space defined by a resin-made guide cover that is detachably attached to the saw cover, and wherein the guide cover has an opening portion formed at a position corresponding to that of the opening portion of the saw cover.