| 摘要 |
PURPOSE:For preventing the medium wear of teeth, to increase the contacting surface between shaving blades and work by providing a projecting guides in a groove section in combination with lands. CONSTITUTION:Projecting guides 13 not concerned in shaving are provided in combination with the lands over the whole whdth of teeth, particularly with the lands located at the sections concerned in shaving. The positions of said guides 13 on said teeth are provided only on the sections corresponding to the pitch circle at the middle of the height of said teeth to increase the contacting area in the vicinity of said pitch circle when shaving blades and work engage each other. Thereby, the medium depression of said teeth can be prevented and work can be shaved accurately by said teeth. |
