Makita 110v 9 inch grinder

[Hmcivil eng]

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

 

[westward10]

Is it a hire generator.

 

[Hmcivil eng]

No it's our own but it's done it on different generators we have 3 and the first time we went through 3 makita grinders

 

[Pete999]

What is the rated output of this particular Generator, that is as you say "burning out 119Volt angle grinders? Frequency and Voltage wise

 

[Hmcivil eng]

I'll have to check when I go in tomorrow thanks

 

[tony clark]

you should try the 36v makita angle grinder the are the dogs b-ll-cks and the 36v angle drill

 

[static zap]

...... burnt out 2 new makita grinders .. ...... Tripped the generator half a dozen times then the grinder got slower....

Are you close up to generator ,or on a very long run of cable ?
(previous experience of 9 inch grinders with similar disks - weight wise ?)

 

[rapparee]

I had a hire generator putting out 320v instead of 230v it blew up the PC that was running off it.

 

[Hmcivil eng]

Are you close up to generator ,or on a very long run of cable ?
(previous experience of 9 inch grinders with similar disks - weight wise ?)

Grinder lead straight to genny

 

[MJPD29]

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

 

[Hmcivil eng]

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

 

[MJPD29]

I didn't day I got it from screwfix Haha but yes I did and I wont get any more from there

I just meant my ones were from screwfix, thought I was buying quality with makita. Turns out they aren't so much anymore.

 

[Hmcivil eng]

I just meant my ones were from screwfix, thought I was buying quality with makita. Turns out they aren't so much anymore.

No mate there cheap knock offs just like there dewalt cordless

 

[Megawatt]

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

 

[Bobster]

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.