Stovepipe Lampshade for IKEA (or Other)

thingiverse

We have had an IKEA floor-standing lamp for ages. So long in fact that I have lost their name for it. But they make similar lamps to this day and the 40mm diameter lamp socket thread for the shade seems to be a standard. When using it as a reading lamp placed just to the side and behind a chair it had never provided concentrated enough light for my tastes, even with a larger wattage bulb installed. Also, because the original reflector was so very wide (see third photo) the light bulb itself would often be in a direct line of sight, causing glare and eye fatigue. And even when the reflector was positioned so as to not see the bulb directly, the internal reflections of the wide reflector still created glare. When originally equipped with an incandescent bulb the reflector would hold its position well enough on the original flex tube mounting. But when equipped with an LED bulb (to save power and create less heat) the additional weight was just enough to cause the mount to sag. I designed two versions of this shade, one a bit wider at 104mm diameter, and one a bit narrower at 84mm diameter including three different extension tube lengths for the narrower version. The larger version is lighter in weight than the original metal shade pieces. But the narrower version is more than 45 grams (1.5 ounces) lighter, so I chose to make this one for my own lamp. It completely resolved the sagging problem and so now the lamp head stays wherever I place it using the lamp's flexible mount. And it does not glare at me any more, producing a nice bright spot of light for reading. For both versions I designed one piece full print versions and two piece versions which allow for easier installation and removal of the light bulb. As shown in the photos, I chose to print the two piece narrower version with one of the longer extension tubes. The pieces fit together snugly without any adhesive after the bulb has been installed (see photo). The original retaining nut is used to hold the new shade into place. Be careful not to over tighten it though. "Snug" is good enough. One or two cautions- Do **NOT** use an incandescent bulb in the lamp when fitted with these shades. It will be hot enough to cause the new shade to distort and possibly even melt (even if printed from ABS or PETG). Use an LED version of bulb instead..! I have been using an 8.8 watt, 800 lumen (60 watt incandescent equivalent) bulb in mine and the new printed shade only gets warm to the touch. Also of course, do not block the top vent holes in the shade. Using this new shade, a neglected lamp was resurrected and now I use it all the time for reading. The shades presented here should also work for almost any lamp using a 40mm-outer diameter style lamp socket. And because it is much slimmer, it blends into the background better without attracting attention. Thanks for looking and I hope this will be useful for you.