Tip dressing cutter

A tip dressing cutter attached to a rotary holder that is configured to rotate with a central axis of an electrode tip of spot welding being aligned with a rotation axis of the rotary holder, the tip dressing cutter being configured to contact a distal end of the electrode tip brought into proximity to the rotary holder during the rotation of the rotary holder to cut the distal end, comprising:

• a rake face extending to intersect with a circumferential extent around the rotation axis;
• a flank face configured to face the distal end of the electrode tip when the electrode tip is brought into proximity to the rotary holder;
• a plurality of recessed grooves formed on the rake face to be spaced at predetermined intervals along a direction intersecting with the rotation axis, the plurality of recessed grooves extending along a direction of the rotation axis to be open at the flank face;
• and
• a cutting blade portion formed on a continuous portion of the rake face and the flank face and extending along a direction intersecting with the rotation axis;
• wherein the cutting blade portion includes a first region made up of an intersecting portion of the rake face and the flank face and a second region made up of a peripheral edge portion of an opening portion of the recessed grooves at the flank face.