adapter
thingiverse
Converting a standard 120mm fan adapter to accommodate the larger 140mm fan size requires some modification. First, measure the distance between the mounting holes on your existing adapter and the new fan's mounting holes. Next, cut or drill out the metal plate on the original adapter to fit the increased diameter of the 140mm fan. To secure the fan in place, attach the mounting screws through the newly created holes and into the fan's mounting points. Finally, replace any removed hardware with suitable alternatives and test the setup by powering on the fan and verifying its proper operation.
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