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I am making a large number of raised panel doors for kitchen cabinets in red oak. Anumber of the various components that I am cutting with CMT router bits don’t cut real clean but leave a frazzeled hair look instead of clean cuts. Is this do to something I am doing or is it a result of certain grain patterns? Is this common? How do I mitigate the problem?
Thanks
Jeff Telecky
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Jeff,
Sounds like the bits are dull, or you are taking too deep of cuts, or the stock is still green. I have always been extremely happy with CMTs (those and Whiteside are all I use). Are you getting the "fuzzies" just on the end grain? If so, use a marking knife to score the cut line first.
Usually when the cuts are too deep or the feed rate too fast, you will get some chip out. Are you getting any of that? A remote possibility is that you have severe build up on the cutting edges.
Dano
*Thanks for the response. They are brand new bits so I suspect they are sharp enough and it is only on the end grain. Might a faster or slower bit speed help? Scoring the cut line sounds like a may solve my problem. What do you use for the scoring a razor knife?ThanksJeff Telecky
*Jeff,Jeff I have a couple of marking knives; one with a left hand bezel the other with a right hand bezel. RPMs could have an effect, I don't have a variable speed router. I've always felt that depth of cut and feed rate to be more crucial.Dano
*Thanks again but am over my head now. What is left hand and right hand bezel?ThanksJeff
*Jeff,Sorry I wasn't more clear. A right hand bezel is where the blade is sharpened on the right side and vice versa. The other side is flat where it is registered against the straight edge. A sharp utility knife could be used, I imagine. You just need to make sure the angle remains constant while striking your cut line.Dano
*try using a back-up board behind your cut.
*Uh Dave, how will a back up board solve the problem on raised panels?Dano
*I get the fuzzies also its no biggie i just hit it with some sand paper lightly then glue it up. It might be the species of wood your using. I get the fuzzies on soft wood . Dont have that prob with oak or maple
*Dan,oops, I thought he was asking about rail&stile. 'Scuse,please
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