Manufacturing of the lamp holder for rear lantern of Gazelle Trim Sport 1983

[Dr. Romano]

The hole for the screw should be made at an angle of 7 degrees, and should not be cylindrical, but conical. The hole is drilled with 3 drills to different depths, and finished with a dental bur.

Drilling a hole for a screw

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[Dr. Romano]

For the Edison E10 thread, a lamp base was used. One more hole was drilled in the polyamide block for experiments.

The E10 lamp base is used for thread cutting

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[Dr. Romano]

The lamp base fits well on a 15W soldering iron. It needs to be heated...

The base is put on the soldering iron

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[Dr. Romano]

... and screw it into the hole.

The heated base is screwed into the hole

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[Dr. Romano]

The cooled bulb base is destroyed and removed piece by piece. The thread is finished and polished with a dental bur. Now the bulb screws in very well. The excess part of the holder is sawed off. All that remains is to polish the finished lamp holder with sandpaper so that it looks like exactly as the original one.

Lamp holder with screwed bulb

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[Dr. Romano]

It turned out very accurate.

A coin is used to open the lantern.

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[Dr. Romano]

The bulb is screwed into the replica holder more tightly than into the original, and not all the wire strands fit. Several wire strands are in the thread, the rest are pressed against the base from below. The bulb lights up!

The lamp holder fits perfectly into place

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[Maarten Waarlé]

Super!
Well done!

[Dr. Romano]

[wimjansen]

Perfect: Good "old" workmanship to the standard!