| 摘要 |
A drill bit for drilling in soil and rock formations, etc., where the drill bit is provided with ribs (3), having a trailing lateral surface (4) which defines the full diameter of the drill bit. Materials (8, 9), having greater wear resistance than the body (2) are inserted in the lateral surfaces (4), which materials (8, 9) comprise at least an element (8) of synthetic polycristalline diamond.
|
