Simple Direct Drive Bowden Extruder

This extruder is not use the idler spring. optimize the filament path, supports flexible filament such as ninja flex.

Work with:
x1 MK8 Extruder Drive Gear(1.75mm and 3.00mm)
http://www.ebay.com/itm/390979321657?
x1 625VV Groove Sealed Ball Bearing
http://www.ebay.com/itm/291229577872
x1 Push-In Fitting PISCO POC4-M6M
https://www.monotaro.com/p/0950/0172/
x1 M5 20mm Parallel Pin
https://www.monotaro.com/p/5032/5791/
x1 SMF105ZZ
https://www.monotaro.com/p/3460/9574/
x4 M3 20mm Cap Screw
x1 OD 3mm ID 2mm 50mm PTFE Tube
x1 OD 4mm Bowden Tube