Prusa i3 Spool Holder

Prusa i3 Spool Holder
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Reduced friction spool holder to give better prints.

A smaller diameter axle than the factory spool holder to give better leverage to the filament drive.

Spindles centre the spool axis of rotation with the spool centre of gravity for easier rotation.

Fully printed. No other hardware required.

Printing
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One each of the axle, left and right support arms and nuts are required. The left and right components are not interchangeable as they have opposite direction threads.

Print spindles as required to fit your filament spools. If in doubt, print the 50mm diameter spindle and then print larger diameter spindles if required. A tight fit in the filament spool is not necessary.

Assembly
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The arms fit to the axle with opposing threads so that any friction from the rotation of the filament spool will help to keep everything tight.

Start with the axel and one arm. Decide which side the arm goes onto the axle