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What size solesaw for 80mm, 92mm & 120mm fans?

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I know a 4 1/2" is perfect for a 120mm fan because of the "dead space" between the edges of the fanblades and the actual fan chassis make up for the slightly smaller hole (114mm)
 
er..... try 80mm, 92mm & 120mm ???

Sorry could not resist. ;)

You want to make the holes slightly smaller than the fan. I think my hole saw for 120mm fans is 112mm :)
 
A CD is five inches in diameter, a 120mm fan is slightly more than 4 1/2 inches. It's quite far from the perfect size...

An 80mm fan would be something very close to a 3" hole, that should be about perfect. A 92mm fan should be right next to a 3.5" hole.
 
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