Filament Guide with Pulley Sheaves for 608 Bearings by ScottW1

Last crawled date: 3 years, 1 month ago

This is a filament guide with two pulleys. I'm using this to route filament between a customized food dehydrator (to keep filament dry during printing) and a Lulzbot Mini.
The base clamp is a "friction fit" for 1/4" material (in my case, the plexiglass top to my printer enclosure), using flex in the plastic for clamping force. I designed it for PCTPE, a nylon which has quite a bit of flex. It should also work well as-is with ABS. The gap angle may be too tight for a more rigid material like PLA, but the Sketchup design file is included if you want to change the gap.
The pulley sheaves provide a press fit for a standard 608 bearing, and have a retainer stop to center the bearing in the sheave. The sheaves slightly overhang the bearing, so (2) standard M8 washers are needed on either side of the bearings (4 total) to space them and the sheaves away from the support. I used standard metal washers here, but printed M8 washers or spacers would be an improvement.
The M8 nuts and bolts were generated from the parametric "Nut Job" customizer design linked as a remix source.
I printed all parts from Taulman PCTPE. I used a 0.15 layer thickness for the nuts and bolts, and 0.25 for everything else. Infill at 80% on nuts and bolts, 60% on all others. Everything prints without support, but the bolt holes are cleaner with support.
Sketchup design file included for the support bracket and pulley sheaves.