Neck Portion Grinding Apparatus, Grinding Device Employed in the Neck Portion Grinding Apparatus, and Neck Portion Grinding Process

A neck portion grinding method for changing a shape of a neck portion of the rotating tool by grinding the rotating tool by the grinding wheel by the use of:

• a grinding device having a disc-like grinding wheel and a wheel rotating device for rotating the grinding wheel;
• and a machine tool having a main shaft for rotatably supporting a rotating tool and a table mounting the grinding device thereon, and relatively moving the main shaft and the table by numerical control,
• the neck portion grinding method comprising the following steps of:
• abutting the grinding wheel on the rotating tool by relatively moving the main shaft and the table;
• and
• grinding the rotating tool by relatively moving the main shaft and the table while mutually rotating the rotating tool and the grinding wheel, in a condition where the grinding wheel abuts on the rotating tool.