Drilling Thru 12 Inch Block+Inner Wall

Cut a metal hanger, sharpen the point and chuck it into your drill. Drill the max depth with the masonry bit and then use the wire to complete the hole.

A hanger will go through both wood and block. BTDT

Or just buy a longer drill bit.....

Seriously? Do you use HS (I know you don't use hammer-setting!)?

If the block has the cored grouted (cemented) it aint' going through. An extension for the bit should do the job if the hole size is at least

an't detect any hollow). I have a 12" long masonry bit but the total wall i s something like 18 inches! Is there a way of detecting where the drill is located from the outside (after maxing the depth from the inside)? I was wo ndering about studfinders that can detect live wires and metal studs or a n on-contact voltage detector and connecting a live wire to the bit or rod... any thoughts on this? Thanks! Bob_V

An extension holder for the bit is not that expensive, assuming you have a decent hardware store within 20 miles or so.

Has anyone taken the carbide end off...and silver-soldered it to a slotted rod?

If you have an electric welder, weld a bit of rod on and extend the drill. You might have to bash it about a bit to get it straight.

Silver solder won't hold up.

Start on the outside and drill a test hole to see if the block is hollow. If it is, drill your outside hole and use a piece of wire to figure out how far you are from the sides of the hollow space in the block. Then you sho uld be able to use a tape measure to hit the same hollow from inside. The holes won't be exactly opposite but probably close enough. You can make th e outside hole a bit bigger to help. Then get that concrete patch in a cau lk style tube to "grout" the hole after you run what ever it is you want to run through it.

What's with all the half-assed measures?

Get a longer drill.

You probably mean drill bit...Mr. other half of the ass!

So If you are unlucky and hit a web you lack 6" of depth in the concrete block; if not on a web, maybe 1 1/2". For that, you could take a steel rod, shape the end some and bang away with a hammer. Ultimately, you'll probably pop out a sizeable chunk.

As far as going from the other side, how accurately can you drill and measure?

Just for the record, I did not call you an ass did I?

Do what you want.