Patent ID: 9095947
Filing Date: 2015-08-04
Classification: B23D,B23Q,Y10T

Abstract:
1. A rotary cutting tool comprising: a body comprising an internal cavity extending from one end of said body along an axis, said internal cavity comprising a first portion having a first cross-sectional area, a second portion having a second cross-sectional area less than said first cross-sectional area, and a third portion having a third cross-sectional area less than said second cross-sectional area, said second portion being between said first and third portions; a plurality of teeth extending outwardly from said one end of said body; a shaft disposed in said internal cavity along said axis, said shaft being movable axially relative to said body between first and second positions, wherein said shaft comprises a guide body slidably seated in said first portion of said internal cavity when said shaft is in said first and second positions, and an end portion which closes said third portion of said internal cavity when said shaft is in said first position and does not close said third portion of said internal cavity when said shaft is in said second position; and a tip coupled to or integrally formed with said guide body of said shaft and disposed outside said internal cavity.