115mm (4 1/2 inch) is the standard small grinder
230mm (9 inch) for the larger sort
I'd suggest you stick to either of those.
My preference is for a diamond blade for all masonary tasks.
Screwfix will do you a 115mm grinder for £10, £8 for the diamond blade, and
a 230mm for £25, £20 for the diamond blade. Not sure of their quality as I
have other makes, but I would assume they are on par with DIY store own
Worth getting some metal discs while you're there as 5 115mm metal cutting
discs will set you back another £2.
Believe me, it's flippin annoying having to go to the store & shell out £4
on a single disc when you need one in a hurry.
The larger grinder is more cumbersome but gives a much easier cut in
masonary work and now I'm used to it I prefer it to the 'baby' for any
cutting. Tend to use the baby for grinding only now.
Make sure you get good eye protection and also a breathing mask. It
would also be a good idea to wear clothing that can keep the dust off
the rest of the property - I'd suggest one of those cheap one-piece
affairs you can buy in any shed.
Angle grinders chuck stuff into the atmosphere which you don't want to
be getting in your eye or into your lungs.
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I was forewarned so I taped up both kitchen doors and climbed out
through the window. I don't think anyone can be told what it's like,
you just have to experience it yourself or you won't believe it. Not
being able to see your hand a few inches in front of your face in a
lit room is a strange feeling.
email: jim.hatfield.org (replace the "a" with "@")
I did this and thought i would only have the one room to clean , but
after cleaning up and then removing the tape it was all over the
house , it took ages to clean . definatly would have been quicker to
do it with a bolster and a mash hammer!!!
Ive just bought a few months ago the 9" grinder from Makro cant
remember the name but a cheapo yellow one and with a diamond sisc from
Ebay ive cut hundreds of cuts in paving slabs seems to be standing up
At £10 it's worth buying the Screwfix one to see how you get on
with it. If it burns out within a year, you get a replacement
under warranty (IME Screwfix are good about replacing things). If
it burns out after a year or it just isn't up to the jobs you
want to use it for, you can treat it as disposable and use the
experience to specify a better/more expensive one with the
confidence that you now know what you need.
As it happens I have the £10 Screwfix jobbie and the diamond
blade, but only for two weeks so I have no way to know how it'll
stand up to hard use. Even if it lasts longer than I do, that
tells you nothing - the failure rate could be 90 per cent in the
first year and I could have one of the other 10 per cent. At the
rate Screfix shifts stuff, even the quality is brilll, there's
still going to be somebody out there whose grinder went nova on
the first outing. That can happen with any brand, just some are
more likely to do it than others.
FWIW, mine feels solid enough and the quality quite adequate, but
that's only a superficial judgement and I haven't used any other
brands so I don't know how it compares.
115 is good. It's the size of the useful disks you'll use. Bigger
grinders are OK, smaller would not be. They don't care too much what
the disk size is, so long as the guard is big enough.
Don't remove the guard. It's there to protect you if the grinder kicks
Grinder quality is somewhat unpredictable, and not especially
brand-dependent. Switches are the favourite failure point, and
windings a close second. It's not work that kills them, it's dust -
particularly conductive dust. Some switches jam on if filled with
dust. This is hazardous, and even "good" brands like AEG do it. Cheap
grinders work as well as good ones, but they don't do it for so long.
Get a grinder with a pushbutton spindle lock, not two spanners. It's
worth getting a quick-release nut that doesn't need spanners - some
grinders include them.
Get lots of disks, and lots of different sorts. I find little use for
metal grinding disks these days and do nearly everything with flap
disks instead. Good quality flap disks are better than cheap ones - I
pay the extra for blue Hermes and their special coatings. Screwfix's
new flexi disks are handy for not putting flats onto curved pieces,
but they cut very slowly.
Paint cleaning disks (loose-weave scouring pad) work well on some
paint finishes, poorly on others, and they'll disintegrate rapidly if
touched to a metal edge.
Wire brushes are useful and powerful, but use good-quality twisted
ones, not loosely crimped ones, or else wear a thick shirt !
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