I had one of the Lidl 125mm grinders which got serious abuse in it's life & was my goto grinder for heavy grinding or a wire wheel. It eventually let the magic smoke escape, maybe using 7" sanding discs on it was too much!
I needed a new 125mm to replace it & with no sign of them coming back into Lidl I ordered a Metabo one. Of course within days of getting the Metabo the Lidl ones were back in stock.
So now I have 2 125mm grinders, one costing nearly 7 times as much as the other.
In using the 2 grinders there is no comparison, the Metabo is simply a beast with its 1550w motor. Even at its lowest speed setting it doesn't slow down in use, you can easily stall the Lidl one!
I'll be doing a review/comparison post sometime soon. What I will say is that the newer Lidl one seems a lot lighter than the old one, I don't think it will stand as much abuse!
Back to the original topic - I use my 5" grinders for sanding, wire brushing & heavy grinding, everything else is 4.5" or rarely 9".
I'm very wary of them. I had one chew the front of my jumper once - it was then I realised it takes more than 1.7 seconds to key the 'off' switch......
i just purchased another lidl one to add to my other 12 now I have a bakers dozen!
The lidl ones are good in the respect they have a varible speed controller but they do vibrate like crazy i feel numb afer using them for any lenght of time where as the old bosch one is smooth as
Last time I used a wire brush wheel, it was an old one that had been lying in the workshop for years. Was walking about like Hellaraiser finding little bits of wire everywhere for days
Just bought one of the Makita 5" GA models last week BTW...seems fairly smooth. Part of the reason for buying was it's on Amazon Prime...I bet that happens a lot