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cutting a circular hole for fan?

post #1 of 6
Thread Starter 
hey i have a dremel and cutting disks but how do you go about cutting a nice 80mm or 120 mm hole? is there a certain method to follow?
Old Puppy
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Old Puppy
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post #2 of 6
use CDs or DVDs for templates normal sized ones are 120mm and the samll mini ones are 80mm. place the CD/DVD where you want the hole then trace around it with a marker then use the dremmel and follow the line
post #3 of 6
i did this on my old case. 2 80's in the top .


this is eezy-peezy really. you need a real drill and some holesaws. i had to use a cord drill becuase my 20v cordless took forever. my holesaw set cost me about 50 bucks a few years ago but you could probably buy them in singe package at home depot.
   
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post #4 of 6
easier said then done of course.
You can always go to the local hardware store and buy a 120mm Circular bit.
post #5 of 6
get a 4 1/2 inch hole drill bit thingy, that is what I use for 120mm
post #6 of 6
if you dont have a dremel or hole saw like me, you can use a jigsaw and drill...
you need a metal cutting jigsaw blade and a 3/8'' metal cutting drill bit.
this is the hard way btw. So you shouldn't do this unless you have those and no dremel/holesaw. but if you want to do it the hard way, trace the hole(i used a math compass set to 60mm radius) drill a pilot hole, then the 3/8" with the outer edge as close to the inside of the line as possible following the pilot hole, then stick the jigsaw in, and follow the line all the way around.
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Reborn Legacy
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Delta AFC1212DE 5 x Coolermaster R4 (red LED) Windows 7 Pro Dell U2412M 
MonitorMonitorKeyboardPower
Asus VW223T Mitsubishi Diamond Pro 710s Leopold FC200RT/KB (tactile touch with blank keys) Corsair TX850W 
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Reborn Legacy (mod) Razer Deathadder Rocketfish Beyerdynamic DT 990 Pro 
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