So I know I am proably making the fees and speed for onefinity too difficult but all these videos and reading material doesn’t truely help me when all I know is the about of flutes my bit has and the diameter. all calculators need 3 specs to calculate what I need Lets say I picked up an bit on the ground in a parking lot. All I can do is measure the diameter and see how many flutes it has how would I program it with just those two specs?
The key would be to figure out your surface speed (m or ft per min) and feed per tooth (mm/in) for the material you’re cutting then select an appropriate rpm and feed rate to achieve those with the size/flutes of your bit.
Ultimately your feeds and speeds are dependent on the material (including the finish quality desired) and the rigidity of the machine/tool. Unfortunately even the best references are generally only starting points as there is such a wide variety of machines, spindles/router, tools, and materials that it’s not possible to determine every single combination.
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Shameless self promotion: https://cncexplorer.com can help.
Please do not purchase it – my co-creator is no longer with us and he was the only one who could convert sales into licenses. Poor choice I know.
If you want a full copy let me know. I may just open source it - we will see.
-Tom
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I did purchase it years ago when you first developed it 
and still use it occasionally when I use a mystery bit that doesn’t have a manufacturer’s set of recommended feeds & speeds. Definitely a handy tool. + 
