On 22 July, 17:35, "Andrew Mawson"
wrote:
"Tim Lamb" wrote in message

...



In message , Andrew Mawson
writes

"Tim Lamb" wrote in message
.. .
In message , Andrew
Mawson
writes

"Tim Lamb" wrote in message
.. .
Most advice given here recently has been for dry work and
230mm
discs.

My 2 stroke stone saw is about due for a new blade and I
wondered
if
anyone has a recommendation or comments about something
suitable
for
wet
cutting?

I have rather a lot of concrete blocks to lay.

regards
--
Tim Lamb

Tim,

18 months ago I bought a bulk lot of 10 on ebay - they are "Blue
Spot"
"Pro Series" "Professional" stock code 19533 - as is the way
with
these things I was somewhat sceptical hence buying 10 rather
than
one,
however despite very heavy usage chopping up concrete slabs and
blocks
I've still only used 3 off them! I think they were supposed for
dry
use, but I've used them both dry and wet and they've performed
very
well.

Hmm.. Disc prices seem to vary between 15 and 150ukp!

Manufacturers claims seem to centre around hardness of material
to
be
cut. I.e. insulating block to seasoned, flint based concrete.

Nobody mentions wet cutting.

regards

--
Tim Lamb

Mine came from :

http://tool-bargains.co.uk/

I paid £73 for 10 off plus postage

Must have been a temporary line. They are only offering concrete
grinding discs at the moment.

Plenty of stuff on e-bay.

Lots say dry use so perhaps one could conclude the others are OK in
the
wet:-)

regards

--
Tim Lamb

Mine say dry use, but are absolutely fine in the wet. They don't say
only dry use.

AWEM

The distinction is the ability to withstand the heat of dry cutting.

The soft/hard materials thing is all about the matrix the diamonds are
embedded in - in hard materials, they wear down fast so the metal
matrix needs to be softer so it wears away and exposes fresh
diamonds. In soft materials, a soft matrix would be a waste of
(still) good diamonds.