Part Selector Tool
Select Parts
While a standard fender-bender assembly requires 12 distinct parts, there are many different combinations that can be chosen to meet your exact needs. As of v2 there are over 90 distinct parts!
This guide is intended to help you build a print-list for your unique needs.
Ideally, your fender-bender should be installed in a location that creates a straight path to your filament rolls, and to your printer. This significantly reduces friction in the system.
Our default design assumes that you will have a wall mounted buffer with the filaments suspended above. The buffer will be installed with the hanger slightly below the level of the printer, ensuring that there is a straight line from the 45 degree exit of the filament bracket to the back of the printer.
However, this solution may not be practical in all circumstances. You may, for example, want to suspend the filament buffer from the back of a wheeled table or cart, with the filament mounted in a frame above the printer.
Forward (Default):The path closest to the bracket mount extends in a straight vertical line, the path farthest from the bracket extends outward at a 45º angle
Straigth:Both paths extend in a straight vertical line.
Reverse:The path closest to the bracket mount extends outward at a 45º angle, the path farthest from the bracket extends in a straight vertical line.
Fender-Bender supports many options for connectors to hold your tubing securely in place, as well as no connector (which is our default design). While not conventionally used in 3d printing applications, 6mm outer diameter tubing adds significant strength while reducing friction.
The tubing options show both OD (outer diameter) and ID (inner diameter) measurements. The connector types shown are standard push-through connector sizes which will alow the tubing to be securely locked into place.
Determines how many separate filament channels are generated for the external wall parts.
The Prusa MMU system supports five filament channels; common ERCF kits support 8 or 12 channels
Hanging: Adds additional horizontal spacing to the frame components to support the interlocking frame hanger. Has a rounded bottom which is lightweight an elegant; but cannot stand on its own. Additionally, there is no "drybox" version of the bottom hanging bracket.
Standing: The standing design slightly reduces the overall length to reduce filament usage, and removes the back cutout for the hanging bracket.
Hybrid: Combines the strengths of the two systems. Adds additional horizontal spacing to the frame components to support the interlocking frame hanger, and maintains the cutout on the top frame for the hanging bracket, but adds a frame to the bottom which supports drybox configurations and allows the system to stand on a flat surface.
Hex: A hexagonal pattern that allows for maximum visibility when troubleshooting filament flow issues.
Solid: All wall parts are solid, simple geometries. Provides full isolation between channels and reduces filament consumption for the fender-bender itself, but eliminates visibility to the system.
Drybox: Adds a thin barrier to external parts while maintaining some of the hexwall styling. Eliminates visibility to the system.Note: selecting this will also change the bottom bracket choice, in order to maintain the seal.
If you don't want to purchase bearings, or they're unavailable in your area; we've included a print-in-place bearing design for the filament wheel. This will not be as durable or as smooth as a proper bearing, so it's not generally recommended.
A surface mounted installation allows you to hang the filament buffer directly from a desktop or tabletop surface. This installation method on a rolling desk can make changing filaments signficantly easier, especially if you're able to mount a filament hanger to the desk surface as well.
M4 bolts and nuts (or heatsinks) are required for installation.
If you prefer heatsinks to M4 nuts, choose this option.