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Compact Low Friction Spool Holder
This "Compact Low Friction Spool Holder" is intended to be used with my "Ultimaker2 Rail System"
and is a modification of Roberts well known Low Friction Spool Holder; http://www.youmagine.com/designs/882. The component "608_core2" is unmodified.
It's a bit of a strange choice maybe but I based this thing on 608 bearings (=M8) and a long M6 Hexnut, simply because I had this available (and did not want to use a M8 bolt for weight saving). I added the DSM file so you can easy adjust to other bearing dimms if you neeed to.
One of the 2 end holders will go over the head of the M6 hexnut completely, so you can mount 2 spoolholders close together on the rail system (2 spools in one bracket inbetween them) I made the 50mm spool adaptor for UM & ColorFabb spools, with the DSM file you can easily modify it to any size you need. This component could also be a good base to make a "loose fillament adaptor" I'll may make one later if ever I need one...