| 摘要 |
<p>An insert boring tool includes radially outward and inward cutting inserts (14, 15) mounted thereon. The radially outward and inward inserts (14, 15) are arranged such that end cutting edges (16, 17) of the respective inserts are intersected with each other at a point of intersection in loci of rotation of the respective inserts in a plane containing an axis "X" of a tool body. The radially outward and inward inserts (14, 15) are positioned such that, assuming that a radial distance between the point of intersection and a radially outermost end of the end cutting edge (16) of the radially outward insert (14) is A, and a radial distance between the point of intersection and a radially innermost end of the end cutting edge (17) of the radially inward insert (15) is B, a ratio of A/B takes a value of from 2/8 to 45/55.</p> |
