8mm Jag's Yet Another Extruder Filament Drive
by gaerisl, published
Use this if you only have one 606 bearing, have access to 8mm bearings, and are in a pinch.
8mm bearings are commonly available on longboards and skateboards. (ID 8mm, OD 22mm, width 7mm).
Nov 20, 2012 update:
If you're having issues with breakage and need stronger parts,
MarcusWolschon has created this buffed-up version: thingiverse.com/thing:35092
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That is correct; the ID of the bearing is 2mm larger than the OD of the bolt.
Unfortunately, the various heads available on 7mm and 8mm screws are too tall/wide to fit into the assembly (from the selection that I found locally).
However, the mismatch in diameters has not presented me with any problems, The spring tensioner may also help over a static tensioner.
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Assemble via Jag's instructions (http://www.thingiverse.com/thing:7113), using the same parts, except substituting a 7mm hex head (or 6mm, if you can't find one with small enough hex heads) screw for the idler arm axle.
Yes, support is also included already for the idler arm.
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