Anybody user this dremel attachment?

[ErickSaint]

http://www.amazon.com/gp/aw/d/B000HI...4276120&sr=8-1

I want to cut 3 holes in the bottom of my case. 2 for intake fans and one as an exhaust under the PSU, should that fan ever turn on. Which I hear is next to never in the SS units.

A 4.5" hole saw for a 120mm fan is going to be about 40 bucks with arbor. This attachment is obviously a cheaper and more versatile option.

That being said, if I go with the dremel unit does it make more sense to go with 140mm fans? I can cut any size up to a foot with that jig. I already have all the holes laid out and center punched for 120mm, but not sure if that extra 20mm is that significant.

Sorry I always get long winded when I post.

[killjoyjim]

I would go with the 140mm.

[ErickSaint]

Just noticed my phone put user instead of use, smart phone my azz.

I was thinking 120 just based on the availability of 120 rad grills. When I get around to matching the holes on the top panel I was going to use a grill for best appearance. And bring under the idea that you should have your intake/exhaust fans matched to a degree. Front and rear stock locations are 120.

Because I have no plans on doing water at this point, doesn't mean I won't in the future. Are 140 rads becoming more standard? 120 were considered giant the last time I built a case.

[Drdeath]

Just noticed my phone put user instead of use, smart phone my azz.

I was thinking 120 just based on the availability of 120 rad grills. When I get around to matching the holes on the top panel I was going to use a grill for best appearance. And bring under the idea that you should have your intake/exhaust fans matched to a degree. Front and rear stock locations are 120.

Because I have no plans on doing water at this point, doesn't mean I won't in the future. Are 140 rads becoming more standard? 120 were considered giant the last time I built a case.

140's are getting less popular. 120 is the norm and a 140 does not do much better

[ErickSaint]

Also just looked at Amazon. The 120's I was looking at are $15 each, the 140's jump up to 23.50 each. That's an extra 34 bucks just for those 4 fans.

[Drdeath]

No need for a 140mm IMO. Stay with 120mm.

[ErickSaint]

That's kind of what I was hoping to hear. I used a template from mnpctech to mark all my mount and cutout holes. Then got to thinking about weather it was worth going to a 140. Thanks guys.

I'm going to see if I can get that jig locally at home depot, and try it out this week sometime. I've never tried milling aluminum with a dremel, hope those 561 bits work.

[Bob2701]

Use the money saved on filters.

[vinman]

Seeing that your cutting aluminum the dremel tool will work just fine, take your time during the cutting process and all should go well don't rush the cut is what I mean!

[killjoyjim]

OK I was wrong. 120mm.

[ErickSaint]

After 4 hardware stores I finally found the jig, only 2 left. The great part was it was a buck less than it sells for on amazon.

Seeing that your cutting aluminum the dremel tool will work just fine, take your time during the cutting process and all should go well don't rush the cut is what I mean!

The jig came with one bit, a 561 I think. And I had read online that the rotozip SC4 bits are the same as the 561's but cheaper, so I got some of those too, as backups. 4 bits for $8 instead of $5 each for the dremel bits. I hope this works out. Because for the cost it's a far better deal than a hole saw I'd use for 4-5 holes. This can do a hole from .75" to 12".

[ErickSaint]

Hey Vin, you think I should use something for a cutting oil? All I have on hand is wd40. Or is the alum on a case thin enough that it's not too big of a deal?

[ErickSaint]

So. I guess the good news is, it worked, bad news is I'm not exactly happy with it. The bit seemed to like walking around and the first cut was awful. Going at high speed and very slow feed rate the bit came loose and was starting to chatter, ending in a lopsided hole. I stopped, put the bit back into place, increased my feed rate a bit and the bit started clogging up. The second two holes were a little better, not perfect but better, but I wont feel comfortable using this thing on my irreplaceable top panel.

I'm sure part of it is just inexperience with the bit and jig. Another part is there are a bunch of perforated air holes under the PSU and where the drive bays were. When the bit hit these instead of hogging through them it kinda got stuck and hung up.

I'll post pics in my worklog later tonight after I get them off my phone and on my server.

[mybadomen]

Nah i have the Roto-zip version of that setup and even with the expensive Metal bit it does the same thing . Walks all over the place and i ended up using the Roto-zip with a cutting wheel and just held it at an angle to make a perfect circle.

[ErickSaint]

Lesson learned. If I use holes for the top instead of a large opening, I will either do it all with cutting discs or I will spring for a real hole saw. It's what I get for trying to be cheap I guess.

[alfredshuryan]

Help me understand guys. I've not cut holes in aluminum yet but if I was to try I would start with a Hole Saw like this: Newegg.com - Dewalt D180066 4-1/8" Bi-Metal Hole Saw . Would this work for cuttin a fan
hole? This is what I thought a 120mm would need.