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公開日時:2017-03-25 12:12:26
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I couldn't print the original one ( http://www.thingiverse.com/thing:2006453 looks good but it's not manifold) and I made this simple tool to sharpen manually like at the end of this guide:
http://www.instructables.com/id/Sharpen-Your-Drill-Bits/step16
2 files: 135° and 118°
