alt Hacker NewsYes, I agree that China can copy Sherline’s IP and it’s a form of theft. An estimated 70-80% of the parts can probably be made in China. If you would like a breakdown I can provide it.
Sherline, for example, specifies spindle nose runout of 0.0005 inch or less and spindle end play around 0.0002 inch or less, using two 20-mm ball bearings with adjustable preload. That’s only about 13 µm runout. A Chinese factory can absolutely manufacture that.
Manufacturers such as SIEG took conventional lathe architecture and mass-produced it.
There is nothing original going on there lots of copying
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But isn't this completely fine ? The US became an industrial powerhouse by doing the same. Even barred foreign inventors from obtaining parents in the US. The U.S. Patent Act of 1793 was explicitly structured to favor domestic industrial growth at the expense of foreign inventors. Provided total legal immunity within the U.S. for commercializing pirated ideas. Only when the US became #1, did international protection of its patents became a priority.
China merely followed the American approach towards industrial success.
If you can quote spindle runout, you know perfectly well that there's no meaningful IP in this market segment. That would have been achievable by any number of manufacturers a hundred years ago.
It's a pure manufacturing cost play to make something precise enough, rigid enough, and light enough[0] while being inexpensive enough for the market segment it's aimed at.
Is it a bummer that a US manufacturer went out of business trying to make money at that play? Yes. Is there anything nefarious going on with IP theft? Absolutely not.
[0] This is being sold to customers who don't hire riggers to move their machines.