Inside counter bore processingequipment

(B, ) the utility model relates to an inside counter bore processingequipment comprises handle of a knife, main cutting edge, front cutting edge and spiral chip groove, main cutting edge, front cutting edge and spiral chip groove adopt the shaping of high -speed steel integrative process, its characterized in that: main cutting edge, front cutting edge and the spiral chip groove is coaxial arranges, the spiral chip groove be located between a plurality of front cutting edges, the spiral chip groove communicate to the tip (b) (b) of handle of a knife by the tip of front cutting edge. (B, ) (b) the utility model discloses (B, ) (b) takes the spiral chip groove, and the chip removal is unobstructed, can relapse the coping, the utility model provides an unmanageable difficult problem of the inside counter bore of work piece, easy operation, long service life (b).