The universal spool roller (holder). Could be used for direct printing from multiple spools as part of (Manual Material System) or if you switch colours or materials in between your prints. The print file is set to print parts for the complete assembly for 4 spools, it can be adjusted to hold various size of spools (up to 5 KG) by simply repositioning the nuts. To hold more spools, print more parts. 

*** This model requires an assembly before use!!! ***

You need to buy M8 HEX nuts (DIN934), M8 threaded rod and ball bearings of 608 ZZ type (external diameter has to be 22 milimeters). The ball bearings allows each spool to move freely and independently of others. 

The assembly is easy and contains just 2 reccuring paterns. Assemble on both threaded rods simultaneously !!

Ball bearings are available at Maker's Supply, M8 Hex nuts could be ordered from e.g. Amazon.