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The discs that come with the kit are pretty bad. I would make sure that you have them secured properly to the tool. You'll also want to ensure that you apply a minimal amount of pressure when cutting. Once I got the hang of it, I was able to cut through my roommates aluminum downpipe on his Supra (Not done in revenge :D ) The plastic on the C4's are just about as hard!
If I'm not mistaken, they also sell some more robusts discs as accessories as well.
Make sure you aren't craching the disks when you put them in the tool. Since the direction of the rotation of the disk makes is the same direction for tightening the screw, you only need minimal effort to do this. I use my fingernail and have had no problems. Before doing it this way I cracked alot of disks. Now I wear them out instead. Get yourself a little tube of disks from Home Depot.
92TripleBlack
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The cutting wheels that come with it aren't very tough. You can purchase others that hold up a lot better. I've cut through siding to mount garage lights and wound up using it to cut off about 30 screws that were twp long when I built an arbor in the backyard. They wear down but don't shatter like the ones that come with it.
There are two types of cut off wheels, one is thina nd brittle and breaks about the time you plug in the tool. The other type is made of fiberglass and does a great job.
I got the jigsaw blades and they worked great for the long straight edges. The fiberglass cutting wheels work just fine on the Dremel. Don't shatter and cut well. Put the two together and time for :cheers:
I used my dremel with the flimsy little discs to trim off the shipping lip on my camaro's Harwood cowl-induction hood. One disc did the whole job. Wore it down to the arbor, but finished. :)
The discs are very brittle, if you are near a Black & Decker outlet store, you can usually find a tube of about 50 of them for under 10 bucks. If everything goes right, one will last quite a while, if you get in a hurry, they will disintegrate about the moment that you touch them to the work.
This is kind of ghetto (or, in my case, poor college student-ish), but I used tin snips to cut the mass of the lid off, filed the edges smooth w/ a metal file, then sprayed black rustoleum on it. It looks great (even though you can't see it installed). :cheers:
Maybe if you can tell your wife the dremel sucks you can return it now and get out of the tile thing. :D