Drill bit size for a 140mm fan?

[Patrick_143]

what size of drill bit should i use to "screw in" a 140mm fan because I'm modding my case for more exhausts.

 

[JamesSneed]

A 5.5" size Hole Saw (140mm = 5.51181")

This kid does a great job and has the good tips with the painters tape, corded drill with hole saw, etc(he is installing a 120mm fan):
https://www.youtube.com/watch?v=-ofuudUEQds

 

[Patrick_143]

That helps but to screw in the fan onto the case

 

[ARICH5]

um there is some mesurments going wrong here...a 140mm fan is 1.4 cemtimeters which is a 1/2 an inch....5.5 inches is..well.. half a foot

 

[Susquehannock]

You will need a 5-mm or 3/16 inch drill, depending on your preferred standard.
Hole in the fan frame is smaller so the threads can grab it. Typical screw shown below:

 

[JamesSneed]

um there is some mesurments going wrong here...a 140mm fan is 1.4 cemtimeters which is a 1/2 an inch....5.5 inches is..well.. half a foot

You are off a zero 140mm is 14cm.

 

[JamesSneed]

That helps but to screw in the fan onto the case

Just use a drill bit slightly smaller than the screws you have. Something like 3/16ths will be common however it can vary depending on the fan cover you choose.