18” Drill Bit?

You can, but it will be tough going without a hammer drill and the heat on the tungsten blades with increase dramatically.   

Bricks are easy.  You need a masonry bit. So basically a carbide tipped drill bit.  You will be paying for the length...probably costing more than your electric drill. You will need 2 bits, one for a pilot hole so 1/4" and then follow with the size of twist drill bit for your lead insert.  Then you insert the screw into the lead and it expands the lead against the brick.  I am thinking you are drilling too deep as there is probably a stud wall so you can drill into the studs and it will hold.

I think you're talking about an 18" LONG bit of some lesser diameter.  Usually when you describe a bit with a measurement, you're talking about the diameter.  18" would be one mighty hole saw, not a drill bit.

Just rent an SDS hammer drill for a half day.  If you need 18" of drill bit and think you're going into brick, get a tool designed for going deep.  Buy the bit, rent the drill, don't run the drill too fast - you can easily overheat even a masonry bit and ruin it if you go too fast - retract the tip often to clear dust, and this way you don't destroy your drill.

You can, but it will be tough going without a hammer drill and the heat on the tungsten blades with increase dramatically.   

As long as the bit has a normal size shank, it will work in ANY drill.

Can you find 18" bits that will fit your drill? Yes but you have to know your chuck size.  I have never seen one like that for masonry, then again. I have a hammer drill and also used to have a core drill.

masonry bit for brick, yes.  hammer drill is a LOT faster.  you can rent one at the usual home improvement store where you buy the bit ... AND -- I strongly suggest searching their website online for the long bit you need -- might be a special order item.  [My local Ace Hardware probably has it -- they specialize in harder to find items -- but smaller hardware stores likely don't.]  -- grampa

For that kind of job suggest you hire a drill for half a day. 

It could well wreck your B&D, so well worth it.

no problems ...an SDS bit is just the way the bit attaches to a keyless chuck ..but they will fit in a standard chuck ..the type you tighten with a key ..i use this sometimes every day ..so you just need an 18" masonry bit ..but walls are normally less than a foot wide ..it needs to be a hammer drill ..no masonry bit works without it ..and just make sure it going forward ..turning clockwise ..

An SDS drill is a slotted drive system... in reference to the drill chuck and the drill bits.

Since you do not have that you need to look for a masonry bit with a straight shaft. 

Most drills they sell in stores have either a 3/8” or 1/2” drill chuck. If yours is 3/8” make sure you do not exceed that size when selecting a bit.If you are going through brick you can do it without a hammer drill… just be patient …. If you are going through concrete you might consider renting/buying a hammer drill.