Push on knob - "D" shaft

thingiverse

Turn knob clockwise until it clicks into place. I engineered this part to replace the broken one on my portable Holmes brand heater, which was heading for the trash before I had an epiphany - I possess a 3D printer! I drafted this design using Solidworks, then sliced it with Simplify3D and printed it on my Monoprice Select Mini v2. To ensure a stable print, I oriented the model "D" end down and incorporated supports.