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I have a 3.5kva generator wich has burnt out 2 new makita grinders .. they are used for cutting 3mm steal box section .. not forced through the metal at all to be fair it hardly scratched the surface. Triped the generator half a dozen times then the grinder got slower slower and nothing just stopped.. if had many 9ich grinders runny off generators in the past ..
Any help would be grateful as I'm told the generator is burning them out
 
What is the rated output of this particular Generator, that is as you say "burning out 119Volt angle grinders? Frequency and Voltage wise
 
It's not the generator I had 2 in a week also they are awful and poorly made the second one I returned I just took a refund and staff member at screwfix said they were getting loads back. Change brand. I got the cheaper Erbauer and it sticks a lot of abuse
 
It's not the generator I had 2 in a week also they are awful and poorly made the second one I returned I just took a refund and staff member at screwfix said they were getting loads back. Change brand. I got the cheaper Erbauer and it sticks a lot of abuse
I didn't day I got it from screwfix Haha but yes I did and I wont get any more from there
 
I have a 3.5kva generator wich has burnt out 2 new makita grinders .. they are used for cutting 3mm steal box section .. not forced through the metal at all to be fair it hardly scratched the surface. Triped the generator half a dozen times then the grinder got slower slower and nothing just stopped.. if had many 9ich grinders runny off generators in the past ..
Any help would be grateful as I'm told the generator is burning them out
This is just a guess but i bet the grounded conductor is not bonded to earth, at 120vac any thing you plug in is probably going to fail. Solution is drive a price of pipe in the ground and run a wire from the rod to the frame
 
3.5KVA running 2 9inch grinders.

I doubt the genny is man enough to run this load. Anything else coming off it? 32 amp maximum output (unsure if this is it's continuous rating or not).

Average 9 inch grinder require around 16 amp a little less in reality. So running 2 of them you are really on the limit of the genny. especially with stopping and starting the grinders at the same time.

Why are you using a genny? Location restriction?

Might be better with a fixed transformer.
 
3.5KVA running 2 9inch grinders.

I doubt the genny is man enough to run this load. Anything else coming off it? 32 amp maximum output (unsure if this is it's continuous rating or not).

Average 9 inch grinder require around 16 amp a little less in reality. So running 2 of them you are really on the limit of the genny. especially with stopping and starting the grinders at the same time.

Why are you using a genny? Location restriction?

Might be better with a fixed transformer.
It's just one 9 inch and it's on the highway so only a genny can be used but should burn the grinder out surely... it was a brand new grinder
 
Just for balance, I run a 110V Makita 9” grinder off a 3kW transformer. It has worked perfectly for the last few years and cut miles of concrete, or so it feels like now.
 
It's just one 9 inch and it's on the highway so only a genny can be used but should burn the grinder out surely... it was a brand new grinder
Hi - does it seem the grinder starts normally and runs up to speed? I’m just thinking it might not be at full rpm and can’t cool itself?
 
It's just one 9 inch and it's on the highway so only a genny can be used but should burn the grinder out surely... it was a brand new grinder

Apologies, I miss read that you were using 2 at once.

1 grinder on a 3.5KVA genny should be no issue.

Have you tested the voltage the generator is outputting?

If it's not quite 110v and more like 90v the current will increase in the grinder an it also will not run up to full speed. Or the other way the voltage is to high and the insulation is becoming damaged in the grinder.
 

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