Drum knob for Square 6.0 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 6 mm square spindles, the size used on cam switches. ## Sizes in the download All 4 diameters, same shaft fitting: | Diameter | Height | Volume | Weight in PETG | |---|---|---|---| | 20 mm | 19.0 mm | 4.5 cm³ | 5.7 g | | 25 mm | 23.8 mm | 7.3 cm³ | 9.2 g | | 30 mm | 28.5 mm | 10.6 cm³ | 13.5 g | | 36 mm | 34.2 mm | 15.6 cm³ | 19.8 g | Bore measured on the finished solid: 6.20 × 6…

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