Wing knob with heat-set insert M3 - clamping knob, 4 sizes 25/30/36/44 mm, no supports

Three wings with a teardrop section. Turned between thumb and forefinger, so it takes more torque than a round knob its size. 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 | |---|---|---|---| | 25 mm | 13.0 mm | 2.7 cm³ | 3.4 g |…

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