Printrbot Simple Metal E3D fan shroud

This design has good clearance as well as a balanced cooling characteristic

E3D hotend needs more precise cooling because of the big heat break.

I use this radial fan to cool properly;

http://www.aliexpress.com/item/Free-Shipping-Original-Delta-BFB0712H-7530-DC-12V-0-36A-projector-blower-centrifugal-fan-cooling-fan/1691802504.html

The fan is mounted on the adapter designed by Spannerhaead

http://www.thingiverse.com/thing:740810


Thanks to Aistaca for the excellent adapter and