| 摘要 |
1,117,199. Cutting tools. GENERAL ELECTRIC CO. 28 June, 1966 [11 Oct., 1965], No. 28969/66. Heading B3B. A cutting tool comprises a shank 1 with a hard metal cutting tip 3 secured to one end thereof, the cutting tool having a negative back rake angle B of 16 to 25 degrees and a negative side rake angle C of 5 to 9 degrees, the preferable back and side rake angles being approximately 20 and 8 degrees respectively. The side cutting edge angle is between 30 and 60 degrees. |
