3.5" Fan Holder AM8
thingiverse
Having an old fan lying around sparked the idea to cool my TMC2208 UART driver on my trusty SKR 1.3 board. I just so happened to have a 3.5 inch (88.9mm) Intel fan, part number D60188-001, sitting around. The mount is designed specifically for Aluminum 2040 extrusions, similar to those used in the Anet AM8 printer. The Fan Ring file that came with this design allows you to easily create your own prototype and experiment with different fan sizes. If I were to do it again, I'd suggest scaling down the X-axis dimension to about 170mm or even smaller - mine ended up being a bit too large.
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