Richard A Downing wrote:
I bought a very cheap 115mm 900W angle grinder to cut up a rusty old
2000L oil tank (because of later building and a power-pole it
couldn't be removed intact). The grinder worked well for a while, and
I was careful not to force it and to run it only for short periods and
let it cool right down. But before the end of the job it has
burnt-out. No complains at all about the tool supplier, they refunded
the cost immediately without quibble.

My brother-in-law 'hires' tools from B&Q.

If he had to cut up a tank of that size, he'd likely buy the same £20
grinder, burn it out then return it as you did. The replacement can be
used to finish the job, and if it buggers again you get more
replacements for a year.

I can't help wondering why he doesn't just buy a decent tools in the
first place, but as he's there most days of the week it's no biggie for
him to get things swapped now and again.