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Would you like to add information to this article? Interested in writing or submitting an article? Have a question about this article? Hook Angle for Large Radius Cutters 
Question
Forum Responses
From Dave Rankin, forum technical advisor: I agree with contributor T; the knives should be ground in a cutter head the same diameter and hook angle as you are using in order to maintain the exact profile. Another to talk to your grinderman about is the condition of his machine. There are problems on grinders than can also cause profile distortion. From contributor A: I agree with the above. Most likely it is just a hook angle thing. Sometimes it may be a good idea to have your cutter head checked for hook angle. I've had guys that think they had a 12* hook, but when they send me an image of their head, it turns out to be 20*. All you should have to do is put your head, hole down, on a piece of paper and trace around it. Fax it to your grinderman, so you guys can both be sure you're on the same page. From contributor R: I agree with all of the above. Imagine that, everybody agrees with each other. Good luck. Have you reviewed the related Knowledge Base areas below? 
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