30mm fan guard with anti-backwash
thingiverse
A fan guard (for the inlet side) with anti-backwash blades for 30mm fans. Helps prevent air spilling where it shouldn't. I use these for the fan on the extruder heat break with these fans http://www.aliexpress.com/item/2-Pieces-Lot-12V-2pin-30mm-x-10mm-Mini-Small-Brushless-DC-Cooling-Fan/32335064214.html Print Settings Printer: Prusa i3 like Rafts: No Supports: No Notes: The small size makes it a bit fiddly to print, but even quite rough prints seem to work very effectively. I printed it with 0.45mm width and 0.16mm layers. The holes take a #4-20 flat head thread rolling screw (or similar). How I Designed This Designed in OnShape
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