Drum knob for D-shaft 8.0 mm - 4 sizes 20/25/30/36 mm, no supports

A tall drum with round ribs. All that shell area is what makes a slow, fine turn possible - volume, feed, focus. For 8 mm shafts with a flat, as used on appliance and valve spindles. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 20 mm | 19.6 mm | 4.3 cm³ | 5.5 g | | 25 mm | 23.8 mm | 6.9 cm³ | 8.8 g | | 30 mm | 28.5 mm | 10.2 cm³ | 13.0 g | | 36 mm | 34.2 mm | 15.1 cm³ | 19.1 g | Bore measured on the finished so…

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