公开(公告)号：US20230304400A1

公开(公告)日：2023-09-28

申请号：US17704952

申请日：2022-03-25

Applicant: Kennametal Inc.

Inventor： Thomas J. Long, II ,  James R. Geyer ,  Carlonda R. Reilly

IPC: E21C35/197 ,  E21C35/183

CPC classification number: E21C35/197 ,  E21C35/1831 ,  E21C35/1835

Abstract: The present invention provides a rotatable cutting tool with a bit, a washer, and a retainer. The retainer surrounds at least a portion of the shank of the bit. Wear on the shank is reduced by providing a retainer with a controlled hardness that is less than the hardness of the shank of the bit, while still allowing similar wear on the retainer.