How to drill into concrete or granite ?

Usjes

Hi,

I need to hang a mirror but it is a very old house so the walls are made of solid granite stones (covered by ~1cm of plaster + wall paper). My drill is a 600W Black and Dekker and I generally use it for drilling wood but I did once try drilling into concrete to screw down a saddle board but I got nowhere. I pressed down on the drill but it didn't advance into the concrete at all, the drill bit just heated up more and I was worried that if I applied more presure the bit might simply break. So I expect the granite wall will be comparable to trying to drill concrete. From some brief googling it seems my first mistake when trying to drill concrete was that I did not enable the hammer mode on the drill I was just using drill mode. So, assuming I do use the hammer mode this time, is it likely to work ? Will 600W + hammer mode drill holes in a granite wall ? If so how long should it take to make a hole of ~1.5 inches deep using a drill bit with ~0.75cm diameter ? Any other advice for drilling into granite walls ?

Thanks,

Usjes.

knotknowbody

Be sure to use the correct bit type, there are different ones for metal, wood, and stone/masonry, the drill head is visibly different.

TheBody

As the above poster said, use the correct type drill bit. A masonry drill bit looks like this:

punisher5112

Hi op the drill itself wouldn't be up to much.

Know anybody with a hilti or similar they will walk through the wall.

Tried that years ago with my dads drill I since got much better drills.

jane82

Rent a decent drill for the day. Use a masonary bit on hammer action.
Bring ID and a deposit with you.
You are probably gonna burn the drill out and not get into the wall far enough and probably bend your drill bit from pushing so hard.

paddylonglegs

Iv heard of a diamond tipped masonry bit being used also. Does that sound right?

peter bermingham

SDS drill and bit is what you need for that job

punisher5112

Where you based op

punisher5112

Where you based op

Boiled-egg

Try your drill with masonry bit and hammer action enabled. It's only a small hole and even though it's a b&d pos is should do. Other wise borrow a big boy drill to save on hiring.

Usjes

Thanks for the replies, I went ahead with my existing drill using my masonry bit but I was surprised to find that the plaster on this portion of the wall was surprizingly thick. I was able to drill 1 inch plus without even enabling the hammer action. Its a very old house and I guess some sections of the wall have a lot of plaster. So I geuss I'll have to wait for another job to crop up to see if the hammer action plus masonry bit is up to much.

Ging Ging

Usjes wrote: »

Thanks for the replies, I went ahead with my existing drill using my masonry bit but I was surprised to find that the plaster on this portion of the wall was surprizingly thick. I was able to drill 1 inch plus without even enabling the hammer action. Its a very old house and I guess some sections of the wall have a lot of plaster. So I geuss I'll have to wait for another job to crop up to see if the hammer action plus masonry bit is up to much.

Its likely that by pure luck your hole lined up with the grout line between the stones that make up the wall. That would explain the ease you drilled it with. Anyway as saiv above a hammer action drill that takes sds bits is the job if you plan on doing more in the future.