Idler/Pulley Replacement with MR74ZZ ball bearings for Geeetech Prusa i3 X

Original thing: https://www.thingiverse.com/thing:1116216
This is too big for the x-axis, so the belt would grind the linear ball bearing of the extruder holder.

So here's my 2. version of the replacement for the low quality stock idler of the Geeetech Prusa i3. It has the same dimensions as the stock one and is used with 4 MR74ZZ ball bearings.

Dimensions in mm:
d1=11 (inner diameter)
d2=14 (outer diameter)
d3=7 (ball bearing diameter)

I had to drill it a little bit with a 7 mm dr