| 摘要 |
PURPOSE:To prevent missing of tooth by uniforming the load on respective tooth while to reduce the curved cutting or vibration by making the height of preceeding tooth larger than the following one while employing the straight and saw teeth respectively for the preceeding and the following teeth. CONSTITUTION:The height 3H of the preceeding tooth 3 preceeding in the cutting direction against a workpiece W is made larger than the heights 5H, 7H of the following teeth 5, 7. The teeth 3, 5, 7 are stepped in the cutting direction against the workpiece. Consequently, all teeth will perform cutting work of the workpiece to prevent missing of tooth while to prevent vibration or curved cutting by means of the straight and saw teeth. |
