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Blowhole diameter for 80mm and 120mm case fans?

post #1 of 16
Thread Starter 
Hi. I wanna know what diameter of the blowhole for 80mm and 120mm case fans. Do you use a holesaw or a forstner bit? Thanks.
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post #2 of 16
80mm and 120mm.

Holesaw is more commonly used.... Aren't forstner bits for wood and do they come in larger sizes?


120mm diagram: http://www.panasonic.com/industrial/...pdf/fba12g.pdf
80mm diagram: http://www.panasonic.com/industrial/...pdf/fba08t.pdf
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post #3 of 16
Thread Starter 
Well you can use it for metals. You have to force it. I took design & technology in secondary school, (US equivalent of shop) and the workshop was ill equipped. Haha. Anyway, if its an 80mm fan i drill an 80mm hole? But then the fan has some extra space on its side right?
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post #4 of 16
Quote:
Originally Posted by crazydj View Post
Well you can use it for metals. You have to force it. I took design & technology in secondary school, (US equivalent of shop) and the workshop was ill equipped. Haha. Anyway, if its an 80mm fan i drill an 80mm hole? But then the fan has some extra space on its side right?
Yes... the hole itself is 80mm but since the fan is square, you have mounting points. Refer to the fan mechanical drawings above.
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post #5 of 16
Thread Starter 
Yeah. Just read it. Thanks. Then for the screw holes, should i use nuts and bolts or the self tapping screws they give with the fan? I don't know the dimentions of the hole on the case. Is it the same as the fan?
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post #6 of 16
I read somewhere that a CD makes the perfect stencil for a 120mm blowhole, maybe someone else can confirm that.
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post #7 of 16
Yes a cd makes a great template for a 120mm hole.
    
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post #8 of 16
Thread Starter 
Well it does measure up to 120mm in diameter...
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post #9 of 16
Thread Starter 
And yeah, what are the dimensions for the screw holes on the case?
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post #10 of 16
I just made holes a little smaller than the fan screws. Put them in from the top into the fan which is on the inside. I don't have a full blow hole though. Just some large holes to make a vent.
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