I’ve put in a lot of CNC time on a cutting board with the inlay, handles and juice groove. I’m actually using a router to do a 45° chamfer on all the edges. It’s not a cnc bit but figure logic still applies.
45° bit with a guide bearing. I’m starting out with a nice crisp edge of walnut. I’m getting chip out on the lower portion closer to the bearing. Router is set at 1/2 speed. They aren’t exactly super quality bits, but it’s the 1st time using it.
Any ideas?
Cutting into endgrain can be problematic. The wood fibers are standing straight up & get bent over as they are being cut. similar to those shaving commercials where the hair is bent & pulled up as it slices. Feeding the router slower should help a little bit. A good heavy application of sealer will help bind the fibers together.
I’m curious, if you have a piece you can test on, if the results would be different running the router sideways, with the bearing on the top of the board.??
While I love CNC as much as the next person, there are times when one just wants a hand plane and a couple of quick passes.
While I’ve been tempted by:
I’m probably going to get:
(or just make such a sled using my CNC)
That said, perhaps the cut could be cleaned up with:
https://www.leevalley.com/en-us/shop/tools/hand-tools/planes/54862-veritas-iron-edge-trimming-planes
I agree with @Tod1d about cutting end grain. Walnut is a relatively forgiving wood but end grain of any wood can and will chip out. On some objects adding a sanding sealer can help stiffen up the wood but since this is a cutting board you likely dont want anything that is not food safe.
The simple truth is you may have to live with minor chip out or sand your way out. The thing about sanding is you will have to sand the entire side or your 45 will turn into a roundover in a certain place and become obvious to the eye. Our human eyes find inperfections even when we are not looking for them.
If as @Tod1d suggested with some scrap change your angle of attack or try you oiling finish on some scrap to soften up the wood fibers and then apply your 45.
Another trick would be to make 2 passes to get your final 45. Take 90% of the depth on your first pass and then adjust your router down a little more so you take less of a bite on the second pass…
You should check the area of the bit where the bearing and the carbide come together. Some of the cheaper bits wont have carbide long enough to go to the bearing and that can cause chipping.
Anthony
Turning the cutting board on end and changing the orientation of the cut totally worked. Thanks for the idea. Logging that in the ol’ data brain.
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