Thread: Cordless angle grinders

Hi there

Ive had one of these for small jobs they are great but quite heavy on battery use and also they are pretty bulky.

What sort of battery life are you getting? It will mostly be used for cutting more so then grinding

we have one too 18V and it is juicy on the battery I think now we are luck if we get 40mins to an hour of continuous use out of it but thats grinding not cutting.

However I also have the dewalt grinder that has a cord and even with the other one with a brand new battery it doesn't match the performance of a 240V grinder.

I was actually quite surprised at the difference...the 240 simply got the job done so much quicker

If your getting 40 mins I would be happy with that to do what I need it to do. Probly a dum question tho is a 12 volt charger available?

yes but I bought mine from the states though so had to have a convertor thingy the charger is supposed to charge batterys in 2hrs I think or something like that...

when I say 40mins thats not 100% power got to wo. the power on the grinder drops off through this period, I would imagine that you would get a fair bit of cutting time out of one though.

I have a few battery dewalt tools the drill has been pretty good but really didn't like drilling the holes for the coach bolts in the post and rail fencing. got a few sparks and smoke out of it dammed damp wood!!!

Originally Posted by dullbird

we have one too 18V and it is juicy on the battery I think now we are luck if we get 40mins to an hour of continuous use out of it but thats grinding not cutting.

However I also have the dewalt grinder that has a cord and even with the other one with a brand new battery it doesn't match the performance of a 240V grinder.

I was actually quite surprised at the difference...the 240 simply got the job done so much quicker

Totally agree with the 240v comment.
I am a great believer in Lithium polymer batteries........but a cordless grinder with a cutting disk is not much chop, its more of an office wallers weekend handy man tool. Even in an 18v version.
It will be fine for VERY light duty work but if you start to push them they are very annoying to use as they trip all the time.
Could be hand to have on a bush trip.

I have 3, 2x milwaulkee, 1x dewalt. These get used a fair bit at work, cutting wall tiles, and roof tiles with a tungsten carbide cutting wheel, also use it for grinding steel and cutting, but mainly use 1mm disc for this. i prefer to use this over the 240 as its just easier . 240v one is better and more powerful though.

Well, I am at the other end of the stick. I use a Makita (18v) and a Panasonic (14.4v) cordless grinders 5 days a week (shed builder) mainly for cutting (wafer discs) and not grinding and swear by them.

I know they do not have the grunt of the 240, but the bonus of not dragging a power lead around and convenience does it for me. You have to work within the limits of the gear as with all things and as I have a bit of cordless gear, I have enough batteries not to get court short.

I also have a (Bosch 125mm) 240 as well for larger jobs, but it rarely get out of it's box.

As a matter of interest, most (all that I have seen/used) cordless grinders are 115mm or 125mm with the larger (22mm vs 16mm) spindle, so discs are not interchangeable with the common 4" 240 volt models.

0.02c