> You aren't supposed to cut aluminium with abrasive disks unless the
> discs are specifically designed for it. =A0I'm not sure if the little
> Dremel wheels will suffer, but if you use a proper angle grinder with
> the 4" discs the aluminium clogs up the disc and as it gets hot it
> expands and can cause cracks to propagate through the abrasive material.
> Ultimately this can =A0result in "catastrophic deconstruction" of the
> disc.

The Dremel disks have a very limited lifetime. They will shatter if
bent and need care in use and they decrease in diameter quite quickly
under suitable abrasion. But, they are still extremely useful.

The link I gave lists a number of other Dremel cutoff disks with
higher durability.


                 R

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