HOLDER FOR HEAD REPLACEMENT-TYPE CUTTING TOOL, AND HEAD REPLACEMENT-TYPE CUTTING TOOL

摘要

The holder for a head replacement-type cutting tool (1) is provided with a holder main body (2) and a tubular coupling member 3 which is housed in an attachment hole (4) formed on the holder main body (2) and made of a metal material lower in hardness than the holder main body (2). A recessed part is formed on an inner circumferential face of the attachment hole (4), the coupling member (3) is engaged with the recessed part by firmly attaching the outer circumferential face thereof on the inner circumferential face of the attachment hole (4), and the coupling member (3) is provided with an attachment screw part (3E) which is screwed into a head-side screw part (13) formed at the replacement-type cutting head (10).