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Home Made U-Lock Bicycle Lock

Step 13Grind slots in the hasp guard

Grind slots in the hasp guard

Keep reshaping the hasp guard until you can get the padlock to fit in it properly.
I probably made the "ears" on mine too short because of too much coffee.
The grinder blasted lots of crap into my face, so I was glad I had safety glasses on.

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Author:TimAnderson

Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional ...