This is a hotend and part cooling solution for the stock Creality or MicroSwiss hotend. The duct design is based on a proven part cooling solution and makes effective use of a 5015 blower. The hotend is cooled by the stock 40mm fan.
There is no need to cut threads as recesses are included that will accept M3 nuts providing a threaded anchor for M3 bolts, two of which are required to secure the hotend duct to the X carriage. Two more secure the BLTouch bracket. A single M3 bolt clamps the height adjustable part cooling duct in place, and one secures the 5015 blower to the duct.
BLTouch offset: X -41.24, Y -6.25
EZABL 18mm offset: X -47.15, Y -16.44
28-10-18: EZABL 18mm bracket added.
3-11-18: ABL brackets and HEDuct updated to remedy a couple of minor interferences.
21-11-18: Major update to both the duct and the hotend shroud. Airflow has now been optimised using CFD analysis for improved part cooling, and far less spillage of airflow from the hotend to the part. A second duct fixing has been added to address concerns about the stability of the duct.
26-11-18: Revised version of the hotend duct uploaded after the omission of a relief cut for the lower wheel nut was noticed by a user. Apologies for any inconvenience.
28-11-18: Revised EZABL bracket added to overcome an interference with the new duct. Apologies for any inconvenience.
14-12-18: Check out https://www.thingiverse.com/thing:3279582 if you need a mount for a 12mm ABL probe.
4-1-19: A revised duct has been uploaded to address an interference with the bottom of the X carriage.
7-1-19: V4 duct uploaded to address am issue with a thin wall.
10-02-19 V3 of the hotend duct uploaded to address the missing 40mm fan bolt holes. Apologies.
11-3-19: Revision of the shroud and duct to accommodate the Microswiss hotend with a bit more clearance, more vertical adjustment of the duct and improved duct mounting with two bolts.
13-3-19: V2 of the revised shroud is uploaded to resolve an interference with the BLTouch.
1/5/19: A revised shroud has been uploaded with space for the MicroSwiss hotend. There is also a revised duct with two mounting points for the 5015 blower is response to requests.
The slightly awkward overhang on the radius of the duct has also been eliminated, but not shown in the images.
Technology Outlet PETG
The part cooling duct prints without supports, as does the BLTouch mount. The hotend duct requires a few supports but it's designed to require minimal contact, so the supports should be easy to remove.