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#197848 - 12/23/10 03:21 PM Cutting brick out  
sparkync  Offline
Joined: Oct 2002
Posts: 829
When installing an outside outlet or light, I'm use to outlining the box to be cut in and using a roto hammer or hammer drill and chiesel to cut out the hole. I had a helper recently mentioned an air tool that might make this job a whole lot easier and neater. Anyone have any suggestions as to what he might be talking about or some other tool that might make it easier? Thanks for the input.... Steve
By the way, I'm talking about brick here. I forgot to mention that:)

Last edited by sparkync; 12/23/10 03:22 PM.

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#197850 - 12/23/10 06:40 PM Re: Cutting brick out [Re: sparkync]  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,135
He may be talking about an air chisel. They do work but you need a lot of air.

Greg Fretwell

#197852 - 12/23/10 08:45 PM Re: Cutting brick out [Re: gfretwell]  
Tesla  Offline
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
Fein Multimaster is state of the art for straight cuts.

For circular cuts there are some tungsten carbide hole saws specifically designed for rough cutting exterior walls. These are NOT the ones used to knock-out sheet metal. They have a gritty, ultra rough, abrasive style edge. It permits attack on stucco and brick.

Normally pitched to plumbers, IIRC they are imported from Denmark. I just can't remember the band name.

Skip the air powered tools. Just too much trouble to set up for field work. They suck down energy -- meaning that you need 25Amps at 240V to keep up with your tempo. Most of that energy is lost in compression and expansion.


#197854 - 12/23/10 09:51 PM Re: Cutting brick out [Re: Tesla]  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,135
When I was cutting into block and concrete I used a side grinder with a diamond wheel to outline the cut and the air chisel to break out the meat but like Tesla says, you need a lot of power. I only have a 1HP compressor with a big tank but I had to chip a while, stop and let the tank fill up and chip some more. If you just had those little sausage tanks on a pancake compressor you would be there a while.

Greg Fretwell

#197864 - 12/24/10 02:24 PM Re: Cutting brick out [Re: gfretwell]  
KJay  Offline
Joined: Nov 2007
Posts: 763
I have a smaller Bosch 11224VSR SDS rotary hammer that works pretty good for that kind of stuff. It can drill the outline and inner holes for the box location quickly and has enough chipping power with a 3/4" or 1-1/2" chisel to make fairly clean cuts.
If I use anything larger, like an 1-1/2" hammer, I'm asking for trouble, like cracking the mortar joint and popping the whole brick loose.
Although, I have been thinking of trying my big hammer with a heavy-wall core bit to make a hole for a round fixture box at some point.

I also use a 4" angle grinder with the dry-cut blade as mentioned. It does work great cutting brick, but it's kind of hard to use for something like a one-gang box without over cutting the corners.
I've got one of those Rockwell Sonicrafter multi-cutters, but I have never tried to cut brick with it before.

#197866 - 12/24/10 03:06 PM Re: Cutting brick out [Re: KJay]  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,135
On the one gang you drill the corners and connect the dots with the angle grinder to get a clean edge. You are still chipping out most of the meat. A 2" - 2 1/4" hole saw would help you there. I do find the air chisel gives you pretty good control without really banging the wall that hard.

Greg Fretwell

#197894 - 12/26/10 08:09 PM Re: Cutting brick out [Re: sparkync]  
luckyshadow  Offline
Joined: Jan 2005
Posts: 307
Maryland USA
I used to use the old 1/4" masonary bit trick. (drill a ton of little holes). Then I went to the grinder with a diamond wheel. Before putting up the tools (for a pen and code book) I was using the grinder and a small chisel bit that fit in my SDS drill.

#197895 - 12/26/10 08:15 PM Re: Cutting brick out [Re: sparkync]  
Steve Miller  Offline
Joined: Aug 2001
Posts: 325
Loudoun Cty, VA
SDS drill, small (3/16) bit, a lot of little holes then a 1" chisel bit in the SDS. Piece of cake and very, very few screw ups.

#197940 - 01/02/11 09:52 AM Re: Cutting brick out [Re: Steve Miller]  
sparky  Offline
Joined: Oct 2000
Posts: 5,311
that's pretty much the way i do it too

just that, in my case 'little rotational tool up on ladder' seemed a tad safer than 'big rotational tool up on ladder'

A conclusion i came to after i found that i don't bounce as well as i used to....


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