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What's something that's seen as Obsolete, but isn't? (lemmy.world)

submitted 3 weeks ago by [email protected] to c/[email protected]

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[–] [email protected] 2 points 2 weeks ago

You'd be surprised how slow machining can be. Cutting speeds are all in sfm (surface feet per minute) and when you have a BIG part, them feets add up quick. Check out videos of big old vertical lathes running big parts. You can get down to a quarter of an rpm but the flange or fitting is so fucking huge that you're still pushing 100-200 sfm at the bit.