Super low friction universal spool holder for Wanhao Duplicator i3 by tahustvedt

Last crawled date: 3 years ago

Edit - 09.11.2015
Added one with a hex for the mounting cone and rounded edges on the roller -> Holder02.STL
Also added a nut ->Holder03.STL
This spool holder fits on the stock Wanhao bracket in place of the stock plastic holder and attaches with the stock nut. There is no need to tighten it hard. As long as the spool hole is circular and can fit over the 42mm end of the roller, it will work and roll with super low friction. The filament will not even stretch out, but always run in a loop from now on.
The roller doesn't have to be the same size as the spool hole to work. As a matter of fact, the spool rolls more easilly if it's free to swing or roll on a rolling spindle like this.
Requires:
1 M12x40mm or longer screw.
2 12mm inner diameter x 28mm outer diameter ball bearings: https://www.banggood.com/Wholesale-10Pcs-6001-2RS-12x28x8mm-Rubber-Sealed-Shielded-Deep-Groove-Ball-Bearing-p-62906.html?p=HD240528697332015103
Assembly should be obvious. One bearing goes in each end of the large roller tube, with the little spacer in between. It was made for 12x28x8 ball bearings because I had a few of those lying around. Feel free to request other sizes or model your own using the same design.