I wouldn’t trust the feeds and speeds — view these as just a convenient way to get the dimensions loaded initially (and which should then be verified).
See Intro to CNC - Part 5: Feeds & Speeds - YouTube for concepts on this and see the series #MaterialMonday: #MaterialMonday on YouTube for specifics.
You should test feeds and speeds in a piece of scrap using the technique at: https://precisebits.com/tutorials/calibrating_feeds_n_speeds.htm
Extensive discussion at: Origin/consistency of chipload recommendations and https://shapeokoenthusiasts.gitbook.io/shapeoko-cnc-a-to-z/feeds-and-speeds-basics with a spreadsheet for this at: Speeds, Feeds, Power, and Force (SFPF) Calculator - #29 by gmack
Sorry Will, I wasn’t questioning the speeds and feeds per se, just the import didn’t seem to be consistent with the S&F from Carbide3D’s own database, is all.
S&F is still a dark art to me, despite several attempts to learn and being provided with links to guidance documents and YouTube videos. I’ll continue to use the Carbide3D defaults (as the majority of the end mills I own are theirs) until I feel confident enough to ‘fiddle’ with the settings.
Those feeds and speeds in those files are not from Carbide 3D — you’d have to check in w/ the folks who made them to determine what machine(s) they are suited for.
Best way to learn feeds and speeds is to start w/ a conservative setting in a sturdy endmill such as a #201 in an easily machined material — get a feel for how the machine sounds when making a reasonable cut w/ a suitable chipload and then look at the math (or adjust the dial and the feed rate override) to arrive at other solutions.