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8 mm Shaft Crank With Spinning Grip
A print-in-place hand crank that split-clamps onto an 8 mm smooth rod or the end of a T8 leadscrew (8.3 mm slip-fit bore, M3×20 screw with a captured M3 nut) so you can jog a linear stage, mini-lathe or camera slider by hand. The 17 mm grip knob prints already trapped on its post and spins freely; overall 74 mm long with a 52 mm crank throw and 31 mm tall.
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