I bought a Bosch (blue range) 4 1/2" grinder years ago. It has worked
perfectly well for DIY/car repaires until I lent it and it got lost(!).

Ran quite happily for moderate periods, no over heating nonsense.
Handled light steel, medium steel and

Cost me about 110 GBP or so in 1993 ish - although that was a special
offer, buy 100 worth of discs and get a free grinder.

If I need a grinder I'll be getting a blue Bosch again.