Prints in two sections which bolt together with 20mm M3 screws and M3 nuts. This lets you attach it without dismounting the motor.
The washer is meant to be glued to the bottom, see photo.
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Parent Directory - snowblower.scad 2018-11-30 16:54 2.3K Fan for Noma Turbothrower 1500 snowblower-fan.jpg 2019-02-01 13:25 57K Fan for Noma Turbothrower 1500 washer.stl 2018-11-30 16:38 20K impeller-half.stl 2018-11-30 16:37 154K impeller-full.stl 2018-11-30 16:45 278K