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Post by garylyb on Sept 24, 2017 14:40:01 GMT -5
So, I was trying to carve and paint some baltic birch plywood. No surprise, lots of fuzzies when carving it. I tried a few things, but making a second pass in the opposite direction resulted in a clean shave. I used an eighth inch spiral downcut end mill from whiteside, the first pass was climb cut, the second cut conventional. It was like magic. Best, Gary
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Post by Gary Campbell on Sept 24, 2017 20:32:06 GMT -5
Gary... You will find that most wood products cut much cleaner when using the conventional cut direction. Save climb cutting for when you have a wood that is prone to splintering, or when cutting metal.
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Post by Deleted on Sept 25, 2017 9:17:23 GMT -5
I've found just the opposite, I only use climb cutting for a better finish and it's better for the bits and wood because there isn't the rubbing and heat you get from conventional. But I do use a finish pass of around 0.01" normally. Down cut bits leave a nice top but have issues with chip removal and heat build up so I avoid them anyway. You can find some videos on Youtube of fires starting because of using a down cut bit improperly. Applying any finish to the top surface also helps make the fibers more rigid and thus cleaner cutting too.
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Post by garylyb on Sept 25, 2017 16:08:06 GMT -5
In this case, the direction made a big difference. I re cut it all conventional, and all but 1 cut was better than climb. Just the roundover had some tearout.
The white stuff in the pics is paint mask, it needs a down cut bit or else can lift.
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