core drills, to hammer or not

[eggplant]

Hi all,

I need to buy a small (about 1.5") core drill or something to make a hole in a wall, standard house wall 2 bricks thick with a cavity. I assume I'd use a core drill, but do I use it on hammer or not? The drill I will be using is a DW005 24V SDS which I assume will do the job. but do you use core drills on hammer or not?

Thanks

 

[breezer]

no, as it damages the diamond tip

 

[eggplant]

Thanks

 

[eggplant]

ok, I tried and after ages I got half way through the brick, went and borrowed a friends bigger drill which is a dewalt 25600 sds max with an adaptor, but I got home and noticed it had no hammer stop, anyway it was 9 oclock and I needed to finish so I wacked it through, didnt seem to damage the core drill in any way.
After I looked at the spec of the drill and it gave a rating of 100mm for a core drill. My question is, why do they give this rating if you dont use them on hammer and this drill has no normal rotary mode?

Thanks

 

[Scrit]

'coz they're plonkers?

Scrit

 

[Hitachimad]

Its most likely as a guide for use with tungsten carbide tiped coredrills, not diamond

 

[eggplant]

ok whats the deal? the ones I got look like a tube with small nobbles on the end like this
I cant remember what it says on the box and Im not at home now to look. Should these be used on hammer?

Thanks

 

[kevplumb]

yes

 

[eggplant]

buggers, no wonder my plan didnt go to plan! my drillprobably would have done it in that case

 

[Scrit]

There are two kinds of core drill - tungsten carbide tipped and diamond tipped. You should never use hammer action on the diamond tipped as they are brittle.

Scrit

 

[eggplant]

thanks,

all sorted now, the ones I have are tungsten, I assume everyone assumed I had a diamond when I posted originally, out of interest, I made another hole and used my dewalt cordless, went though no problem on hammer lol