Extruder Fan - radial blower design

The design is a simple ducted blower (radial) extruder fan which can be used to focus cooling exactly on the extruder nozzle area. The assembly uses:

- A 50mm x 15mm 12v DC blower fan model 5015S

- A short length (about 80mm) of flexible ducting cut from 10mm outside diameter electrical conduit

- A short length (about 70mm) of heavy gauge copper wire (ie about 1.8mm thick from some scrap power cable)

- A couple of small printed ABS parts

The photos show the assembl