Re: Random Orbital sanders and 4 1/2 inch grinders
- It is an axiom of brush motor design that brush life goes down
substantially as current increases. And current increases with load.
Push an already undersized motor hard and brush life literally goes
from hours to minutes.
Bottom line: Bog your electric tools down and they will die quickly.
So let the tool do the work.
FWIW, we go through lots of 4.5" angle grinders at work. The Metabo
holds up best and always gets stolen before wearing out.