Posted by BillS on August 31, 2005 at 19:04:59:
In Reply to: Helical Gear Problem posted by Zastian on August 31, 2005 at 16:22:48:
It is common to increase the OD of a pinion by "holding out" the cutter. This extends the addendum, and prevents undercut of the pinion (a narrowing of the tooth width at the root). Also, there could be tip interference of the pinion with the gear that requires an adjustment in OD and addendum also.
Likewise, the gear may be cut deeper to maintain a fixed CC distance, but often the CC is allowed to be larger in a gearbox design so that the gear can be cut with standard dimensions.
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