Wenderoth, Lind & Ponack
Throw away insert
 An improved throw away insert for a boring tool has a recess at each corner, a small chip breaking projection formed in said recess and a large chip breaking projection formed in the center of the top surface of the insert to control the chip during cutting for large depths of cut. 
Sumitomo Electric Industries, Ltd.
B B Y Y
B23B B23B Y10T Y10T
additional inventional additional additional
Yoshikatsu
Mori