pine needle hob

Abstract

The utility model discloses a pine needle hob, the left side of the outer side wall of hob main part is evenly convex with a plurality of first cutters that are parallel to each other along the circumference of hob main part, the first cutter is inclined from left to right to the side of the circumference of hob main part, the right side of the outer side wall of hob main part is evenly convex with a plurality of second cutters that are parallel to each other along the circumference of hob main part, the second cutter is inclined from right to left to the same side of the circumference of hob main part as the first cutter, the included angle between the first cutter and the central axis of hob main part is the first cutter bevel angle, the included angle between the second cutter and the central axis of hob main part is the second cutter bevel angle, the first cutter bevel angle is equal to the second cutter bevel angle, and the angle of the first cutter bevel angle and the second cutter bevel angle is less than 3 degrees. The utility model discloses the first cutter and the second cutter's cutting edge are continuous point counter-cut when counter-cut with lower cutter body, greatly reduce the noise of cutting, and simultaneously, reduce the wear of cutter, prolong the service life of cutter.

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