Posted by BillS on March 25, 2013 at 12:55:07:
In Reply to: Re: Chatter marks on gear teeth posted by Tim on March 24, 2013 at 13:02:56:
It might help to put a large mass right behind the gear, but it must contact the gear at its face - close to tooth cutting. A large mass of grey iron would be best. It may help since the frequency of vibration would be lowered by enlarging the mass. If you get the natural frequency low enough then sustained vibration will not occur.
Material with a high natural frequency (think bell) is harder to "damp out" when stimulated by cutter impacts. For instance, ductile iron can ring like a bell whereas ordinary grey iron is fairly dead and not so prone to vibrating.
If you can send me pictures of setup and chatter marks, I'll post them with your original message.
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