| 摘要 |
PROBLEM TO BE SOLVED: To elongate a blade life, and to allow straighter cuts, in a saw blade for cutting a difficult-to-cut material.SOLUTION: A saw blade such as a metal-cutting band saw blade has a cutting edge including a plurality of teeth. A plurality of the teeth include a tip, a clearance surface located at one side of the tip, a rake face located at an opposite side of the tip relative to the clearance surface, a gullet, and a substantially-flat or non-curvilinear projection formed between the rake face and the gullet and projecting outwardly relative to the rake face. The projection is inclined at an acute angle relative to a plane extending between tips of consecutive unset teeth. The projection defines an inner end adjacent to the rake face and an outer end adjacent to the gullet. The inner end is located at a depth below the tip of at least about 25/1,000 inch, and a distance between the inner end and the outer end of the projection in a direction substantially parallel to the plane extending between the tips of at least two teeth is shorter than about 65/1,000 inch. |
