Diamond core drilling - wet or dry?

[Burnerman]

Popular instructions tend to state that diamond core drills should be used dry, yet when using a diamond blade in a Stihl saw for example, water is recommended.....I appreciate this may be for dust nuisance of course.
So, would using my core drills wet give any advantage, or would it be incorrect?
Cheers and good evening
John

 

[Stivino]

I googles "diamond core drilling techniques" and found quite a bit of info.
e.g. http://tinyurl.com/b4olrzk
HTH

 

[Burnerman]

Right, and thanks a lot for that
It looks like water is actually a good idea, on the face of it.....maybe its just not recommended by the hirers due to the electrical safety issues.
John

 

[Monkeh]

Using water depends on the type and size of the core, the speed, and the material.

Most cores up to 6" (and a bit over) are done dry in normal materials, afaik. Some small ones are so fast they're done wet (40mm and the like), but you often use carbide cores for that (impact drilling).

 

[Burnerman]

In my attempt to make yet another £million I'm trying to sort out rising dampness in the walls of some elderly stone cottages.
This involves core drilling 78mm diameter to a depth of around 300mm.
I've scrounged some 3" clay drain pipes (12" long) and I'm setting them in the core using non hydraulic lime putty - the core is around 2 degrees pointing down from the horizontal. The open end is capped with a plastic soffit ventilator to prevent insect ingress if the end of the clay is in rubble.
The idea is that water will capilliary attract through the clay drain and air will help the moisture to escape...its slow but it definitely works!
John