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Relief Cuts for the Back of Mouldings
Question
Forum Responses
From contributor J: I have never used more than one relief on the back of a moulding. I usually go about 1/16" to 3/32" deep +/- for personal/customer preference, and about 2/3 the width of the moulding. It is usually centered unless the customer has specific nailing preferences. 45 degree angles on both sides of the cut to prevent tearing of the wood fiber. Many small cuts help to take up some of the swelling in wide pieces of flooring, but most mouldings don't experience this issue, they are simply not wide enough. Bottom line is to find a technique that works for you and keeps the customer happy. From contributor J: The most efficient way to make a relief head is to use a six inch head, four knife, most profiles are not over six inches. If it is, use the same technique below, but with a bigger head. Use the first two pockets for straight knives, leave them there all the time, just touch them up now and again. The second two pockets use to change out three sets of relief cutters. I say three sets because I have always used three sets, different widths, this technique works for just about everything. The straight knives produce the finish on the bottom face, the relief cutters should be set 1/16" to 3/32" higher than the straight knives to leave the proper relief. It would be nice to make individual sets for different profiles with just two knives, but no one I know does it, too costly.
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