On 22 July, 23:04, Bolted wrote:
On 22 July, 22:49, Tim Lamb wrote:



In message
,
Bolted writes

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.

yebbut, they don't tell you about the matrix. Sometimes they mention
laser welding. What is the significance of that?

regards

--
Tim Lamb

Dunno what that is implying - apart from sounding whizzo - maybe it's
just saying that cheap electro-plated crap.

+ "they are not"

I think that must be what it means. I am getting some worktops cut
from stainless plate, and have been nosing around various laser/hi def
plasma/water jet cutters lately, and a couple of the laser places have
mentioned welding diamond blades. I guess it makes sense, it would
have to be CNC, and as my shallow understanding goes the laser allows
very narrow but very penetrative welds.