30 Pieces of Diamond Grinding Head for DIY 4,49$
http://www.fasttech.com/products/1/10004855/1375401-30-pieces-of-diamond-grinding-head-for-diy
Good shit?
…or just shit?
Anyone have some toughs and experience with cheapo stuff like that?
At that price would it even matter if they were 5hit ?
Nice find, another item for the payday order I’m putting together…. 
I have several packs of them. You get what you pay for. Yes, they are cheap and do not last long at all, but they will work on soft metal. It's the same with the cheap diamond files, they wear out really fast, so I only use them on aluminum , copper or brass. They are really more for de-burring anyhow.
Thanks…
Ill probably give them a try… 
darn good price. -added to cart, thx
I’m not too familiar with the diameters… do they fit on Dremels?
Yes, I believe that’s what they’re intended for.
They also have some newly-added diamond cutoff wheels in various sizes. http://www.fasttech.com/search?diamond%20disc
A Dremel brand diamond wheel is $16 for ONE. At FT's prices who cares if they only last 1 year instead of 5.
Have some from HF and they last NOWHERE near a year. Not a month, not a week. I have gone through several just cutting and aluminum reflector lol
Do what you gotta do, I just deplete the sources I got to avoid spending more money on proper tools hah. The “diamond” is like glued on, dont really know how its applied but hold it in the same spot for 10sec and its gone!
I still have some Black and Decker cutting discs that fit in my Dremel but they are prone to breaking. I think with these things you do get what you pay for.
I have those FT cutting discs. I haven’t tried them yet, but I suspect they will not last very long at all.
If the diamond bits are just for deburring, what's good and budget friendly for reducing the diameter of a copper disc, like a pre-1982 penny, by a few millimeters?
A set of left, right, & straight tin snips from the nearest hardware store.
Are these deburring bits the right tool to knock off the corners after using a tin snip to trim off most of the material? How would deburring bits compare in that task to something like this?
Unless you have some kind of fixturing to either turn the workpiece or the tool in a concentric circle you'll get much better results with a plain-jane hand file. Just scribe your cut line, trim off the majority with the tin snips, and then file down to your scribed line.
Tin snips take a bit of effort to cut through 1/8" aluminum, but is a huge time saver. A file takes forever, but is good for finishing. It turns out the grinding stone is pretty slow too, although much less taxing. I'm going to give this a shot. Hopefully it removes material a lot faster.
http://www.amazon.com/Dremel-9902-Tungsten-Carbide-Cutter/dp/B00004UDJK/