Star knob for Round shaft 3/8 in (9.525 mm) - 4 sizes 30/36/44/54 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. 3/8 inch is 9.525 mm, the shaft size on American valves and older machine tools. Built on the exact conversion, not rounded to 9.5. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 30 mm | 21.6 mm | 6.5 cm³ | 8.3 g | | 36 mm | 21.6 mm | 10.4 cm³ | 13.2 g | | 44 mm | 22.0 mm | 14.0 cm³ | 17.8 g | | 54 mm | 27.0…

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