Rotatable cutting tool with hard cutting member

Abstract

A rotatable cutting tool that is for impingement upon a substrate and adapted to be rotatably retained within the bore of a holder. The rotatable cutting tool includes an elongate cutting tool body, which has an axial forward end and an axial rearward end with a socket at the axial forward end thereof. The rotatable cutting tool further has a hard cutting member, which is affixed to the cutting tool body within the socket. The hard cutting member has an axial forward end and an axial rearward end. The hard cutting member has an axial forward functional portion which has a starting transverse functional dimension, and further has a base portion which has a maximum transverse base dimension. There is a ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.42 and less than 0.48.

1 . A rotatable cutting tool for impingement upon a substrate and adapted to be rotatably retained within the bore of a holder, the rotatable cutting tool comprising:
 an elongate cutting tool body having an axial forward end and an axial rearward end, the cutting tool body containing a socket at the axial forward end thereof;   a hard cutting member being affixed to the cutting tool body within the socket, and the hard cutting member having an axial forward end and an axial rearward end;   the hard cutting member having an axial forward functional portion which has a starting transverse functional dimension;   the hard cutting member further having a base portion which has a maximum transverse base dimension; and   a ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.42 and less than 0.48.   
     
     
         2 . The rotatable cutting tool according to  claim 1  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.42 and less than 0.479. 
     
     
         3 . The rotatable cutting tool according to  claim 1  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.43 and less than 0.455. 
     
     
         4 . The rotatable cutting tool according to  claim 1  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.432 and less than 0.45. 
     
     
         5 . A hard cutting member for attachment to a cutting tool body, the hard cutting member comprising:
 an axial forward end and an axial rearward end; an axial forward functional portion which has a starting transverse functional dimension; a base portion which has a maximum transverse base dimension; and a ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.42 and less than 0.48.   
     
     
         6 . The hard cutting member according to  claim 5  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.42 and less than 0.479. 
     
     
         7 . The hard cutting member according to  claim 5  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.43 and less than 0.455. 
     
     
         8 . The hard cutting member according to  claim 5  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.432 and less than 0.45. 
     
     
         9 . A hard cutting member for attachment to a cutting tool body, the hard cutting member comprising:
 an axial forward end and an axial rearward end, an axial length being the distance between the axial forward end and the axial rearward end; an axial forward functional portion which has a starting transverse functional dimension; a base portion which has a maximum transverse base dimension; a ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.42 and less than 0.48, a ratio between the axial length and the maximum transverse base dimension ranging between equal to 0.75 and less than 0.78.   
     
     
         10 . The hard cutting member according to  claim 9  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.42 and less than 0.479. 
     
     
         11 . The hard cutting member according to  claim 9  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.43 and less than 0.455. 
     
     
         12 . The hard cutting member according to  claim 9  wherein the ratio of the starting transverse functional dimension to the maximum transverse base dimension ranging between equal to 0.432 and less than 0.45. 
     
     
         13 . The hard cutting member according to  claim 9  wherein the ratio of the axial length to the maximum transverse base dimension ranging between equal to 0.76 and less than 0.78. 
     
     
         14 . The hard cutting member according to  claim 9  wherein the ratio of the axial length to the maximum transverse base dimension ranging between equal to 0.768 and less than 0.771.