I stumbled upon some rosewood decking cutoffs. 1" thk x 5.5" wide. Varying short lengths.
It is the heaviest wood I have ever handled. I see the Janka value is around 2700, denser than the Red Oak ( 2150 ) I have been cutting.
Any suggestions on speeds and feeds ?
I just cut some Caribbean Rosewood on my SPEtool bits I had minor tear out (I was using a w04017), it broke my engraving bits tip, and it’s sap is very glassy. I didn’t exactly have any problems with the default hardwood settings but again consider your bit to prevent tear out.
I do have to say I think wood this would make an extremely effective fish bonker though…
The CNC Cookbook have a bit on this:
which we discussed a bit at:
A new (to me at least) resource is:
Awesome. I will make some cuts tomorrow.
Good article on chip load versus stepover versus feed rate.
It’s the first time it makes sense.
Also see:
Usual preface, I’m with PreciseBits so while I try to only post general information take everything I say with the understanding that I have a bias.
Rosewood integrates silica into the grain structure. That makes using a Janka scale not nearly as useful unless you are comparing it to another similar wood that also does this. Depending on which rosewood this will effect you more or less. Really “fun” ones like a lot of the Brazilian rosewood will actually have so much silica in them that they cut more like a composite than wood. In some cases there’s so much silica in them that you are basically cutting into small pockets of glass. Even the not as “fun” ones though will eat tooling way faster.
Regardless of feeds and speeds I would recommend cutting down your pass depth. This will reduce the chance trying to take out as much of a “big” piece of very hard material and either damaging tooling or the wood. It might be that’s all you need as the forces are more or less cubic material removed per flute. Would depend which version of rosewood and the margin you take off.
Hope that’s useful. Let me know if there’s something I can help with.
I am told it is “Jatoba” . I am not sure if that is a Rosewood.
https://www.wood-database.com/jatoba/#google_vignette
Thanks for the heads up !
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