110v Transformers

Cannyfixit · Post by **Cannyfixit** » Tue Apr 07, 2020 11:08 am

Morning everyone, I only have one 110v power tool left I. My arsenal and it’s a random orbital polisher which I use for paint correction on my car,so was wondering .
My transformer is a 3kva and is a heavy bit of kit and was wondering how do you calculate what size transformer I will need if I was to buy a smaller lighter one
Details of the machine
porter Cable variable speed model 7424
120c ac 3.7 A ( Nom3.7a) 2500 - 6000 opm
Type 2
I no other information apart from what I have copied from the label on the machine

Someone-Else · Post by **Someone-Else** » Tue Apr 07, 2020 5:05 pm

I understand what you mean, but is it worth it? The next available size down weighs not much less than yours does, and costs the same price £70 (Screwfix 61847)

fin · Post by **fin** » Tue Apr 07, 2020 5:53 pm

theres one of those daft little transformers at my garage. it works fine for smaller tools. hoys its dummy out with my mitre saw but then it is a geet big festool.

the small transformer i inherited it off a plasterer. he used it for his big mixer drill and it runs that absolutely fine. im sure it even runs my core drill too

Cannyfixit · Post by **Cannyfixit** » Wed Apr 08, 2020 8:08 am

Cheers guys,after some thinking you are right ,no point if there is no benefit in the weight,after asking a few mates it looks like someone has a smaller one I can have for free,result