Star knob with heat-set insert M3 - clamping knob, 4 sizes 20/25/30/36 mm, no supports

Five soft lobes. The shape you reach for when a knob has to be turned hard but must not cut into the hand. Bored 4 mm for a standard brass heat-set insert M3. Melt it in with a soldering iron at about 220 C and let it cool under light pressure. A printed M3 thread strips after a handful of turns; brass does not. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 20 mm | 10.0 mm | 1.9 cm³ | 2.4 g | | 25 mm | 12.5 mm |…

♥ 0