120mm Fan Adapter to 90mm id for k40 stock exhaust duct
thingiverse
120mm fan adapter fits over top of the stock exhaust duct for k40 laser (blue corrugated pipe) Added this as an accelerator to move some more air. Computer fan does not seem adequate but I am trying a larger 120vac 120mm fan. Remixed using freecad, file available if you want to change the diameter and keep 120mm fan.
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