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A comment on Ask HN: Can you make me a 50 meter scroll saw blade?. Parent comment
PCB end mill? McMaster-Carr has end mills as small as 0.002" (50.8 μm) in diameter
https://www.mcmaster.com/micro-end-mills/
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PCB end mill? McMaster-Carr has end mills as small as 0.002" (50.8 μm) in diameter
https://www.mcmaster.com/micro-end-mills/