| 摘要 |
A drill provided with means for effecting a secondary cutting function, such as chamgering, counterboring and/or countersinking. The drill (10) comprises chip flutes, lands (14) and a cutting tip (11). Said means comprise a cylindrical tooth (12) provided with a cutting edge (13) and a pin (17). The land (14) is provided with two holes (15,18) which receive the tooth and the pin. |
