APPARATUS FOR PROTECTING INSERT FROM FALLING OFF A CUTTING TOOL

摘要

A technical purpose of the present invention is to provide a device for preventing an insert of a cutting tool from being dropped. The device can keep a cutting insert fixed to a tool holder without dropping the cutting insert in the process of coupling the cutting insert to a tool holder or releasing the coupling. According to the present invention, the cutting tool insert drop prevention device, which is a device for preventing the cutting insert from falling from the cutting tool including the tool holder coupling the cutting insert with a tool body mounted on a machine tool, includes: a contact surface in contact with the cutting insert; a vacuum hole formed on the contact surface; a vacuum passage which is formed on the tool holder and is connected to the vacuum hole to be through; and a vacuum source which applies a degree of vacuum to the vacuum passage.