| 摘要 |
A pair of complimentary gear cutting hobs including a convex hob having a plurality of hob teeth, with each hob tooth defining on opposite sides thereof cutting edges having a convex shape. The convex shape is defined by an arc with a center of radius which lies in the plane of the bottoms of the teeth. The complimentary hob is a concave hob having a plurality of hob teeth, with each hob tooth defining, on opposite sides thereof, cutting edges having a concave shape which is defined by an arc with a center of radius which lies in the plane of the tops of the teeth.
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