• spot welding is where you place melted material in gaps between two parts to in a sense, 'glue' them together

    When you're in a hole, stop digging. Spot welding is one of the few techniques which doesn't use any kind of filler rod. And you can't weld steel rings to aluminium cranks, even if you wanted to. Those cheap cranks with non replaceable rings have the ring swaged to the crank.

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