Star knob with heat-set insert M4 - clamping knob, 4 sizes 25/30/36/44 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 5.6 mm for a standard brass heat-set insert M4. Melt it in with a soldering iron at about 220 C and let it cool under light pressure. The knob then takes a machine screw as often as you like - that is the difference to a printed thread, which is good for a few dozen turns. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |-…

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