Cyborg Geared Bowden Extruder - With Herringbone Gears and Simplified Hardware

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I really liked this extruder, but there were a couple of things I wished were different so I remixed it. I've replaced the gears with herringbone gears because I think they're more aesthetically pleasing, and I revised some of the hardware because I don't like ordering stuff that's not available locally. I had the 6001 bearings already, so I retained the M12 bolt. The extruder will accommodate 1.75mm or 3mm filament, as long as you have the correct tube fitting and the bolt is hobbed correctly. The M12 bolt is partially threaded, and the portion that the filament will pass over is part of the non-threaded portion so it can be hobbed easily. The M8 bolt holding the 608 bearing in place is a regular cap head screw that I cut the head off of once it was in place. Otherwise it won't clear the main bearings. The body and idler parts are unmodified but I have included them anyway. I hope this revision helps. It's a great design and I hope more people use it. Here's the revised BOM: Bearings: 2x 6001 bearings 1x 608 bearings Bolts: M8x20 (qty 1) - Holds the 608 bearing M3x20 (qty 1) - Holds the idler to body M3x55 (qty 2) - Tensioner Bolts M12x60 (partially threaded) - Main hobbed bolt Nuts: M12 (qty 1) - Nylon lock nut M3 (qty 2) - Nylon lock nuts Other: Two springs M3 Washers (qty 4) One standard NEMA17 stepper motor Print Settings Printer: Monoprice Replicator 1 Clone Rafts: No Supports: Yes Resolution: 0.2 Infill: 100 Notes: I used 100% infill for the gears with support. It's just for the center hub of the gear so it doesn't consume too much material.