Chair Spine for Broken Hydraulics

thingiverse

Here's my tale in bullet points: - I purchased a chair designed to support up to 400 pounds. - My weight is 320 pounds. - The hydraulics lasted for three and a half years before dying about a month or two ago. - I bought a replacement, which only lasted a month and change. - I'm unable to remove the replacement. - I printed this set of interlocking vertebrae and cushions. They work pretty well in my chair so far. You may want to scale up or down depending on your chair, <strong>these print as-is with a diameter of 38.5mm.</strong> The A and B pieces interlock, and have tolerance at about 0.3mm. This can be printed in PLA, but <strong>I recommend ABS or PETG above all else</strong>. About 15% infill should be fine, if you can do the tetra-infill from Cura, I'd go with that maybe. The Cushion piece I printed in Ninjaflex, <strong> and I'd recommend that or another very flexible (not semi) material</strong>. That may be printed at about 15-30% infill. I went with 20. Holds up well so far :)