Just last week I string to think how I'd make ball bearings and this strategy ca... | Hacker News

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ahupp on Sept 12, 2013 | parent | context | favorite | on: Shot tower

Just last week I string to think how I'd make ball bearings and this strategy came to mind. Neat to see that it's actually feasible.

willvarfar on Sept 12, 2013 [–]

(Although bearings are made cold. See https://news.ycombinator.com/item?id=6374786 )

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