Tunneler cutting tool with wear detection comprises longitudinal housing containing substance detected in excavated materials when in contact with them

摘要

The tool consists of a steel parallelepiped block (2) with a fixing to the cutting wheel (4). At its free end (9) are projecting metal inclusions (11,13). There is a longitudinal housing (14) containing a substance able to be detected in the excavated materials when it is in contact with them. The housing filling end is closed and the opposite end (17) is located in the center of the tool free part at a distance from the free end at least equal to the tool wear tolerated limit. An Independent claim is included for a wear detection method.