05-18-201107:41 AM - last edited on 03-05-202408:04 PM by ROGBot
One of our customer sent us their Cooler Master Cosmos case to install a 120mm cooling fan and grill in their access side panel. Here are the steps we took in performing this case mod with a Greenlee Knockout Punch, but you can use this guide with 4.5" Hole Saw attachment on your Power drill or Drill press.
List of Tools We Power drill or Drill Press Greenlee Knockout Punch with 120mm cutting blade, but you can use your own 4.5" Hole saw Attachment Measuring Square or Ruler Pencil or Pen Painter's Masking Tape Center hand punch X-acto Knife 3/16" drill bit for fan screw mounting holes. Mouse Sander for removing adhesive residue from the sound insulation foam. Phillips Screwdriver "SEM brand Self Etching" Primer Plastikote's Silver "Engine Enamel" automotive aerosol paint. 4x 8/32 Thread x 5/8" Length Socket Machine Screws 1x 120mm Wire Fan Guard 1x Black 120mm Round Hole fan grill 4x #10 x 5/8 self tapping fan screws
Our customer marked off the 120mm GPU Cooling fan hole location for us, with low tack masking tape.
Using a 12" measuring Square and 120mm Wire Fan Guard to mark the fan hole location.
Using hand center punch to mark the center of the grill location. This is for the 1" diameter Hole Saw attachment pilot drill bit.
At this point, you can use a 4.5" Hole Saw Attachment on a Power Drill or Drill Press to make the 120mm fan hole.
The 1" opening allows us to insert the shaft of the Greenlee Knockout Punch blade.
Using X-acto Knife to cut square shape in sound insulation foam on backside of the panel.
I used a Black & Decker Mouse Sander to remove the adhesive residue left by the insulation foam.
To save time, we use a Greenlee Knock out Punch at Mnpctech.com. Greenlee part # 730EBB-120. Last time I inquired, they were around $450 in the states + Large 3/4" socket wrench, and 2" socket. I wouldn't use anything less than 19" long socket wrench. Estimated purchase price of $550 new.
Crank and tighten the socket wrench to cut through the panel.
Using 3/16" drill bit to make fan screw mounting holes.
The advantage of using a Greenlee knockout punch is that the cut is clean! No need to clean up jagged edges.