Posted by Ron V on August 27, 2009 at 18:50:23:
In Reply to: Surface damage on hard cut gears posted by Ivan Doretzkiy on August 27, 2009 at 13:59:50:
I don't know about the cyclo-palloid system but I do know that the Gleason system can be finish ground.
The only other thing I can think of would be to lap them after heat treatment. I've had this done on spiral gears up to 800mm diameter with good results............I'm not sure about gears as large as you are quoting.
The reduction in resistance to surface fatigue, due to the hard cutting process, that you are seeing is a cause for concern as the process seems to be picking up in popularity.
From your results; do you think that these gear sets should be de-rated?
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