IKEA MARKUS chair strut spacer

thingiverse

The gas lift strut on my IKEA MARKUS office chair was getting a bit tired, so I figured I'd make some spacers to lock it back in place again and not have to buy a new one or fight with warranty. These parts are also likely to work with some of the other IKEA office chairs as I believe they re-use the same strut elsewhere; if it's got a 28mm strut inner, it'll probably fit. The main "chair support" model will snap onto the strut and lock the height to nearly full. I found this a bit much, so made a short version that locks it at half-height again. With both of these you can still merrily spin round on the chair as you wish. Finally, the bushing is intended to be printed in flexible filament (I used PolyFlex at 20% infill) and provides a slight cushion. Perhaps. Totally optional, though.