[h0mersimps0n]

I'm not actually using a dremel, I will be using a dremel-like attachment that goes to my dad's air compressor. I was wondering if anyone has any suggestions for bits and techniques for dremeling (specially since I have a lot of circular holes to cut). I read the dremel sticky and saw that cutting rounded edges is dangerous. Does this mean I should score the metal in a rounded fashion and just keep slowing scoring till I get through instead of trying to cut rounded designs?

Thanks in advance...

[Penguin4x4]

Link

[flounder43]

There are bits that are made to cut interrior holes in metal. The cutoff discs don't work well for circles. Look at these bits, especially #9901-9912.

http://www.dremel.com/html/products/...s/carving.html

[h0mersimps0n]

you kill me penguin, how old are you (just curious)?...

I said I've alread read that link, I'm looking for tips and hints that people might have beyond that. Specially in bit selection....

[Element-Xero]

flounder have you tried those tungstien bits on case metal? I always assumed they werent made for that level of stress...

I'm interested to hear because I'm cutting a large window in my fully today.

[Penguin4x4]

Originally posted by h0mersimps0n
you kill me penguin, how old are you (just curious)?...

I am 8 on the inside.

[flounder43]

Originally posted by Element-Xero
flounder have you tried those tungstien bits on case metal? I always assumed they werent made for that level of stress...

I'm interested to hear because I'm cutting a large window in my fully today.

Nope, I haven't. I have heard them suggested, though. There was a post here in alt. modding about it some time ago. I prefer a holesaw for fan holes, and just don't know about windows...

[Element-Xero]

i managed to cut my first window hole on my old case pretty well. I just used reinforced bits on all the rounded edges. It was smaller tho, it was a pcmods square window kit. I will see how it goes with this attempt.

[JesDer]

Originally posted by h0mersimps0n
I said I've alread read that link, I'm looking for tips and hints that people might have beyond that. Specially in bit selection....

Ever think to ask the guy who runs that site ?

hehe

as said above, the best bet is a holesaw which is why I refuse to write a guide for cutting a hole with a dremel.
Now for the fun part .. how big is the hole? If it is over 2" then just make straigh cuts inside of the lines and then go back with a fiberglass reinforced wheel and grind out the rest. After than use an aluminum oxide stone to round it out a bit more if needed. Follow up with some sanding disks.

-- OR --

Cut inside the lines as above and use a tungsten carbide bit followed by the aluminum oxide stone and sanding disks.

Tungsten carbide can deal with this type of work. The only chance of breaking the bit is if it starts to "chatter". Basicly, if you lose control of it, it could break. Tungsten carbide bits are what is use for most milling machines. The only harder material would be diamond.

[Tbird man]

i was using a tungsten carbide bit and the tips of the bit broke

[JesDer]

Originally posted by Tbird man
i was using a tungsten carbide bit and the tips of the bit broke

Let me guess .. the 9909 .. This bit is very easy to break the tip off of. I have personally killed 3 of them due to chatting. The damn things arent cheap either. I have yet to break any other tungesten bits.

I guess I should have put an exclusion to my above statement

btw - http://www.widgetsupply.com/ sells them cheap, they are bulk so you do not get any packaging.

[Oreo_The_Cookie]

http://www.virtual-hideout.net/guide...el/index.shtml