Nerdy / Hurdy Gurdy Knob
thingiverse
Traditional sized knob for Nerdy Gurdy, to use with M8 threaded rod, this does not need any bearings, the stud is locked onto the crank with two nuts, this knob it then fixed using a washer and nyloc nut to allow free movement. The bush will allow you to use the more standard M6 bolt.
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