Cutter is processed to cylinder body oilhole integral type down

The utility model relates to a cutter is processed to cylinder body oilhole integral type down, including setting up the cutter body on the drill bit, its characterized in that: set up main cutting edge and front cutting edge on the cutter body, the main cutting edge lies in the preceding tip of cutter body, and the front cutting edge lies in the back tip of cutter body, forms integral type processing cutter structure, the main cutting edge has a finish machining cutting edge structure, and the shape in hole is coincide with the size under the shape in its rotary cutting hole and size and the cylinder body oilhole down, the front cutting edge has a finish machining cutting edge structure, and the shape in hole is coincide with the size on the shape in its rotary cutting hole and size and the cylinder body oilhole down. The utility model discloses a set up main cutting edge and front cutting edge on a cutter body, formation integral type processing cutter structure, there is the low problem that reaches the product quality unwarranted of processing of machining efficiency in the split type cutter that can solve prior art, has simple structure, machining efficiency height, the lower beneficial effect of cutter use cost.