Patent ID: 6951057

Claim:
A portable circular saw comprising: a base to be opposed to a workpiece, the base having a front portion and a rear portion in a cutting direction; a main body rotatably supporting a circular saw blade and pivotally movable relative to the base; a slant position fixing member upstanding from the front portion of the base, the slant position fixing member having an abutment surface; a tiltable plate connected to the main body and positioned in confrontation with the slant position fixing member and pivotally movable relative to the base about a pivot axis; and a fastening unit comprising: a thread member having a thread passing through the slant position fixing member and threadingly engaged with the tiltable plate, the thread member having a rotation axis, and a lever member provided at one end of the thread and having a pressure surface in pressure contact with the abutment surface of the slant position fixing member for fixing the tiltable plate to the slant position fixing member to maintain a desired slant angle of the circular saw blade with respect to the base, the abutment surface being configured to allow an angle of rotation of the thread member about the rotation axis to be increased in accordance with an increase in slant angle of the circular saw blade.