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Dome knob for Round shaft 3/8 in (9.525 mm) - 4 sizes 20/25/30/36 mm, no supports

Dome knob for Round shaft 3/8 in (9.525 mm) - 4 sizes 20/25/30/36 mm, no supports

AMPERELAB3D · Cults3D

$1,11CULTS PU - Private Use

A dome over a knurled band. The dome is deliberately flatter than a hemisphere: a true half-sphere would print at 65 degrees of overhang and need supports. 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 | |---|---|---|---| | 20 mm | 21.6 mm | 3.7 cm³ | 4.8 g | | 25 mm | 21.6 mm | 5.6 cm³ | 7.1 g | | 30 mm…

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