eflyguy

I picked up a nice set at Fry's last Friday, included a couple of "saw"-like wheels, one for metal, as well as 5 very large reinforced cutting wheels.
..a

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Short Stroking - Why, and How

Aaron_Henderson

Biggest tips I could give (or re-enforce) -

-Buy brand name re-enforced cutting discs
-Save worn discs for detail work
-Let the Dremel tool do the work, letting the cutting disc "sink" into the metal without forcing
-For curve cutting, use the roundness of the cutting disc

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Screw what you know, you were lied to

PeaceMaker

If and when I do, thank you very much. Good advice. I will be cutting a 120mm hole...

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CattleRustler

to be honest, if youre cutting a hole, you'd be better off with a bi-metal holesaw (if you want the hole perfectly round). If you have a power drill then you could pick up a 4.5" bi-metal holesaw for it, but youll need the arbor that goes with it, and I'd recommend some cutting fluid on the teeth before cutting. I don't know what your budget is like tho.

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[Current Project] PolymorphiX v2 (alu & steel alu hybrids)
[Pending finish] Butcher's Hook (Slipknot tribute bench in steel)
[mod2hardware] All Modding Projects by CattleRustler
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PeaceMaker

I feel like the dremel would be easier for me and more cost effective.

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CattleRustler

more cost effective for sure.
good luck, and: pics or it didnt happen

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[Current Project] PolymorphiX v2 (alu & steel alu hybrids)
[Pending finish] Butcher's Hook (Slipknot tribute bench in steel)
[mod2hardware] All Modding Projects by CattleRustler
[mod2software] WorklogCreator 1.0.1.7 visually build postable worklogs, quickly & easily with drag and drop