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hypodermic needles

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boviner | 12:18 Sun 02nd Feb 2003 | How it Works
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how do they get the hole through the needle, i was told it was done using a method with sand. thank you
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the needle is drawn out llike wire from a larger tube. Much as people make seaside rock.
its actually done using a process called electric rolled welding or erw. Needles start out life as flat sheets of metal and are cut into strips then rolled around a former before being welded at the seem. They are then sand blasted to condition the weld before being cut and sharpened!

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