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Question about uneven cut

2945 Views 3 Replies 3 Participants Last post by  AndyGTC
Hi guys,

Wonder if someone can advise.

When I cut the bearing (bevelled) edges on the top and bottom of my drum shells on the table, I quite often get an uneven cut and some chipping. I always increase the cut in small increments so the cutter isn't doing too much work. However, I still get this. The internal edge of the shell I always turn clockwise and the external edge is turned anti-clockwise. I don't think I have this the wrong way round as doing the opposite is definitely not a cleaner cut. What could be causing this? I'm obviously doing something wrong somewhere. Any ideas?
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Andy, it sounds to me like you are following all the correct steps. Another possibility is a resin build up on the bit. That could cause your bit to stick and pull at the grain. Aside from a bit that is dull or out of specs your problem may be the wood itself. When you assemble your wood into the drum shape are the growth rings all in the same direction or alternating as if you were glueing up a panel or a table top? I am guessing you are having the bit grab on the growth rings and this is why you are getting tear out. What type of woods are you using, and what percentage of moisture do they contain? It is possible some of your wood has cured longer than the rest and is at a different moisture level. Since there is no way to be sure how long the wood has cured unless you cut it yourself, a moisture meter may be the solution. Your wood may be fine at 12% moisture and sticky at 14%.
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