The file 'Desk Lamp Clamp 3D Printer Model' is (stl) file type, size is 2.7MB.
The included files will print the three parts needed to replace the clamp for the standard office spring arm lamp. Note that I included two sets, one for a 5/16" hook bolt, and another for a 1/4" hook bolt. While the 1/4" should work for the newer light duty lamps, the 5/16" was a better fit for a salvaged heavy duty lamp I used.
I could not find L bolts with machine threads, so I had to use a hook bolt and hammer it open so it came close to a L bolt. The nuts that came with it are fitted into the triangular knob.
(updated 5/16" knob to have slightly thicker outer edge at the nut)
LampBaseBottom1_4.stl | 4.3MB | |
LampBaseBottom5_16.stl | 4.4MB | |
LampBaseKnob1_4.stl | 1.2MB | |
LampBaseKnob5_16.stl | 1.3MB | |
LampBaseTop1_4.stl | 5.9MB | |
LampBaseTop5_16.stl | 7.2MB |