i've done the same
to burn out tools you actually have to use them and use them hard as it
seems you do.

another version for some seems to be as follows:
picked up a grinder at the home depot (makita) a last minute purchase that i
needed at that moment.
arrived to the boat.
opened the box
and it was clearly used and burnt out......................

gf.

"Peter Wiley" wrote in message
. ..
I think this approach has its benefits too. Needed to cut a pile of
roofing iron, didn't want to get metal dust in my good saws so I bought
a Chinese 7 1/4" circ saw with a 2 year warranty. I killed it on the
last sheet I needed to cut - smoke escaped. Took it back and got
another one :-) That's now my 'butcher' saw I let other people use and
if it gets dropped off the rafters, so what.

Ditto with a small angle grinder. The good Metabo stays in my hands.

PDW