Cutting blade mounting mechanism

A cutting blade mounting mechanism for mounting a cutting blade to a tip portion of a spindle of a cutting apparatus, the cutting apparatus including a chuck table holding a workpiece, and a cutting unit cutting the workpiece held by the chuck table by the cutting blade mounted to the tip portion of the spindle rotatably supported by a spindle housing, the cutting blade having a cutting edge at an outer periphery of an annular base, the cutting blade mounting mechanism comprising:

• a blade mount mounted to the tip portion of the spindle;
• and
• an air supply unit supplying air to the blade mount, wherein the blade mount includes:
• a columnar boss section inserted into a through-hole provided in the annular base of the cutting blade;
• a flange section projecting in a radial direction from a side of a base end of the boss section and having a support surface supporting the cutting blade;
• and
• an ejector blade suction section having a first air passage connecting a supply port supplied with air from the air supply unit and a discharge port discharging the air, and a second air passage connecting a suction port opening to a side of the support surface of the flange section and the first air passage, and the ejector blade suction section sucking the cutting blade by a negative pressure applied from the suction port.