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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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A Question for our European brethren.
I do a lot of repair and custom work on electric lighting. This includes
retrofitting European lamps to American sockets and wiring. Here in the states, the threading and sizes on our lamp piping is all based on gas piping since our electric lamp industry evolved from our gas light industry. On the European lamps (mostly British and French) there is a thread I have never been able to figure out. It appears to be about 19tpi (or perhaps 1.33mm) and runs around .415 in. outside dia (or perhaps 10.5mm). It doesn't seem to match anything. I made myself a tap several years ago, but it is wearing out and I would love to find a real tap for it. Unfortunately I don't even know what size to look for. Any help would be greatly appreciated. Paul K. Dickman |
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