IKEA Hektar standing lamp adapter

This is an adapter for the tall IKEA Hektar standing lamp (with E27 socket). It connects the base directly to the yoke that's holding the lampshade. I designed this so I can put my two lamps up on high shelves, and they won't take up floor space.

The adapter works similar to the original tubes: It is mounted to the lamp via threads (and custom nuts) and the cable runs inside it. Common M3 screws and nuts are used to connect the two halves of the adapter. It has the same diameter as the original tubes, so it fits visually and some original parts are used as well.

WARNING:
To get the adapter installed you will need to remove the floor switch from the cable! It's not meant to be disassembled and some latches internally will probably break. Aside from that, one conductor is continuous, so you'll have to cut the cable at some point anyway.
This is mains electricity! Only go ahead if you know what you are doing!

Optimized for FDM-printing:

• halved length-ways: large contact area with the build plate and much easier print of the threads. Also prevents failure point at the threads from layer-to-layer adhesion
• custom threads with larger pitch and flattened sides, for easy printing and fewer retractions
• reinforced screw ports and channels, to prevent cracking
• no steep overhangs, maximum 45°
• notches on inner channel to guide the automatic bridging direction of the slicer
• will fit most printer beds (needs at least 220x100mm of space)

What you'll need:

3D-printed:

• adapter part_A
• adapter part_B
• 2x custom_nut

Tools and other materials:

• original washers from the base
• original spacers from the yoke (minus the spring ring)
• 8x M3x14mm socket cap screw (Longer is possible, but will protrude from the sides)
• 8x M3 hex nut
• 19mm and 22mm spanner or adjustable wrench
• probably a new cable switch

Print Settings:

• Printer brand: Prusa
• Printer: i3 MK3
• Rafts: No
• Supports: No
• Resolution: 0.2mm
• Infill: 20%
• Notes: printing with 0.4mm (or smaller) nozzle recommended, mainly because of the threads

Post-Printing

disassembly of the lamp

• If your lamp is already assembled: use the 19mm spanner to remove the original nuts from the base and head of the lamp
• open the floor switch of the lamp and/or cut the cable close to it on the side of the lamp base
• remove the base
• pull out the original tube (optionally unscrew the three tube pieces if you want to store them)

assembly

• put the M3 hex nuts into the slots of part_A. It's intentionally a very tight fit; pull them in with a screw from the other side if necessary.
• Mount part_B to part_A with the M3 screws. Make sure that the threads align properly.
• put the original spacers from the yoke onto the shorter thread of the adapter (see photos for correct order)
• put remaining spacer and one of the printed nuts onto the cable on the other side of the yoke
• pull the cable through the adapter (if it doesn't go through, you can open the halves again and just put it in)
• push the adapter through the hole of the yoke
• secure it with the printed nut, using a 22mm spanner
• push the longer thread of the adapter through the hole of the base.
• put the original washers onto the thread.
• secure it with the other printed nut.
• connect the cable back to the old or a new switch