Direct bowden extruder 1,75

direct drive extruder
designed to be installed on every flat surface on T-slot profile
in the pic it is mounted on the Z top bolt a Pi3.
The hole for the pipe fit is designed to be threaded with 1/8 NPT or M10 on both side
There is no need to open the extruder to insert the filament
there are slope on all the insertion holes just respect the direction of the filament.
Parts needed
1 drive wheel allowed diameter from 9 up to 10 mm
1 624Z roller bearing
4 M3 x 20 mm hex socke