Round hole in drywall, about 2-300 mm, how to do it?

[gronfelt]

As the title says, I need to make a circular hole in a plasterboard, it should be about 250-300 mm in diameter. Is a special tool needed (like a large hole saw), or is there a trick?

 

[Mikael_L]

I was going to saw with a jigsaw.

 

[Ola78]

Would also use a jigsaw and first draw out with a compass where I would saw.

 

[Johan Gunverth]

It's usually murder on the pendulum mechanism to jigsaw in plasterboards. Fasten the jigsaw blade in something and saw by hand. It was just a hole in question, not a hundred holes.

 

[Mikael_L]

Oh right, I do have a cheap jigsaw from ÖoB that I sacrifice for things like cutting drywall. So I don't have to worry about it.
Thanks for reminding me, Johan.

Although I have cut a few meters of drywall with the nice jigsaw too...

 

[Ring]

Is there any gadget for my jigsaw specifically to make round holes, it consists only of a metal rod that you attach to the jigsaw and a point that you should hold in the center of the hole (in fact, a string should work just as well...)

 

[mycke_nu]

I'm using one of these:

 

[zenobia]

A nail/screw, a string, and a pencil create a line where you should "saw." Make the circle slightly smaller than what you need, cut out with a saw similar to the one "mycket_nu" showed. Then clean it up with a morakniv or similar.

 

[OHE]

Take a utility knife and cut the circle. Then make a "plus sign" cut in the circle and hit it firmly.

 

[Stensson11]

As OHE writes, but also do the same on the underside.