The invention relates to a reducing cutter head and a hard
alloy saw blade, the reducing cutter head comprises a front cutter face, a rear cutter face, a left side face, a right side face and a
welding face, a main
cutting edge is arranged at the joint of the front cutter face and the rear cutter face, and a retracting front cutter face is arranged at one end of the front cutter face; the left side surface is provided with a retracted left side surface; the end, away from the rear tool face, of the right side face is provided with a retracting right side face. The
vertical distance between the indented front cutter faces, the
vertical distance between the left side face and the indented left side face and the
vertical distance between the right side face and the indented right side face are all
delta, and the length of the reducing cutter head is L; when L is less than or equal to 8mm,
delta is equal to 0.5 mm; when L is greater than 8mm,
delta is equal to 0.8 mm; the saw blade comprises a reducing cutter head and a base body. The saw blade has the beneficial effects that a three-face retraction mode is adopted, the
grinding amount of
gear grinding machining is remarkably reduced, the contact area of a
tool bit and a
cut object during
cutting of the saw blade is reduced,
cutting resistance is reduced, the sharpness of the saw blade is improved, meanwhile, the weight of the
tool bit is reduced, and cost is reduced.