Full metal Wade extruder

thingiverse

Tried many ABS plastics and various designs of extruders, but always ended with a RIPped printed extruder. I'm using 3mm ABS filament, so the Wade design is essential to push it through the 0.3 nozzle with the right force. This time, I'm hoping for a free maintenance extruder! Here's how I designed it: The 3D standard version has three main parts plus the push filament component, and to be honest, it was easier to mill everything rather than print it. The central part took me a lot of effort to design, but the end result is impressive. I used a DIY CNC machine made from an Ultimaker board, Repetier Host software, and a CNC plugin, all of which ran smoothly once I'd overcome my initial cold bloodiness. The design followed "3D standard" guidelines wherever possible, including using the same M8 hobbed bolt as found in a normal Wade extruder to push the filament out and maintaining the same wheelbases, apart from gears. I used 19t 32p pinion and 66t 32p main gear sourced from RC cars, which will be replaced soon with 18t and 72t for near-zero backlash and original Wade ratio. To minimize gear distance, I employed smaller bearings in the main part. Next, I'll attempt to make the filament slip very difficult, after which I'll test its real torque.