| 摘要 |
PROBLEM TO BE SOLVED: To simply form target teeth with good shape accuracy on the periphery of a target ring fitted on and held by a rotary shaft. SOLUTION: A material ring 2' is used that is provided, on its periphery, with tooth parts 22, 22, etc., inclined unidirectionally and equiangularly and standing side by side without overlapping with each other and connection parts 23, 23, etc., for making connections between them. A tool T is advanced between the tooth parts 22 and 22 along their inclination to cut and remove the connection parts 23, 23, etc. The tooth parts 22, 22, etc., remaining after the removal are provided as the target teeth 20, 20, etc., thus forming the target ring 2. |
