i have purchased 5 seperate mirka deros 6" 650 sanders, each one had a problem,
they all stopped working after moderate use, or if it stopped working at 10000rpm.
luckily i bought them from amazon, so kept swapping them. the 6" pad mirka provides
is not well balanced and each pad is a different weight and spinning at 10000rpm, they
would get wobbly and stop itself. there is also the stop if too hot problem, i had two
do that for about 2-5 days of purchase and then never turn on again.
i have called mirka in ohio and they swear up and down there is no problem, never heard of
such issue. well i said i bought from amazon, so within 30 days, each bad unit goes back
and funny thing, none of them ever showed on amazon warehouse, which means all
went back to mirka to get repaired.
mirka deros has one advantage, sander is light, so if doing above the head work, work at odd angles,
this is the go to unit, but cant work at 10000rpm, 9000 rpm, 8000 rpm for long, not a selling point.
mirka deros with the festool sandpaper leaves alot of dust as the festool sandpaper does not
have all the suction openings that the pad provides.
i am ordering the ets ec 150 because after 5 mirka deros, and none function, its done.
the ets ec 150 has a slow down speed if wobbly or out of balance feature, the mirka is shut down
if wobbly, there is a difference, imho.