Cutting a square hole

[redpis]

Hi,

I have a woodedn 1/2" ply board screwed to 1" battons, the board can't come off the battons but I would like to make a 6 x 6 square hole in it.

The board is to shallow for my jigsaw, or pad saw and chain drilling would neen a fair bit of work to tidy the edges.

What would the pros use to make a hole in this situation.

Ta

 

[JoinerMike]

There is a tool which is advertised on a shopping channel on sky tv. You can set the depth of the blade and run it free hand.
Link below.
http://www.jmldirect.com/Exakt-Saw-2-Year-Warranty-PX2299/

 

[noseall]

Screw another piece of ply over the existing as to make the blade plunge deep enough.

 

[big-all]

when you saw jigsaw i assume you mean the frame of you hand held jigsaw wont reach

some options

power jigsaw

chinese saw

large hacksaw blade and lots off tape to make a handle

oscilating saw like the bosh 180e

floor board saw

some options need a hole drilled in diagonaly opposit corners

 

[redpis]

Thanks for the replies,

Like the look of the link but its a tadge expensive.

If my chosen option doesnt work for me I'll look into the other saws.

Building up to allow the depth to be right is a great idea and one that I will go for.

Cheers

 

[Chukka63]

cut a jigsaw blade down to the correct depth.

i did this last week to cut new in-situ plaster board on irregular exisiting rafters to make sure i got the cuts exactly centre of the rafter.never done it that way before but is so easy.

 

[Deluks]

Router with jig and template cutter.

or, as it's plywood, you could score the opening with a ruler and very sharp knife, and then pare back the ply a layer at a time using a sharp chisel.

 

[r896neo]

I would go for a combo of chukka ad nosealls comments.

 

[Bodgeit and scarper ltd]

that Exakt Saw looks like an accident waiting to happen

 

[big-all]

cut a jigsaw blade down to the correct depth.

i did this last week to cut new in-situ plaster board on irregular exisiting rafters to make sure i got the cuts exactly centre of the rafter.never done it that way before but is so easy.

i use the same method for floor boards as long as you go at a steady pace with pendulum on they cut just fine
if you push too hard the end off the blade will bounce off the top as its a 22mm blade on a 25mm stroke

 

[foxhole]

Bosch 180E. £65

 

[Blagard]

cut a jigsaw blade down to the correct depth.

i did this last week to cut new in-situ plaster board on irregular exisiting rafters to make sure i got the cuts exactly centre of the rafter.never done it that way before but is so easy.

i use the same method for floor boards as long as you go at a steady pace with pendulum on they cut just fine
if you push too hard the end off the blade will bounce off the top as its a 22mm blade on a 25mm stroke

Chukka/Big-all
Gents,

How do you start the cuts ? I can visualise whats happening once you get going albeit a bit scary as the blade clears the workpiece on each stoke!
I would image a little practice is needed to get the pace right.

Do you cut the blades down with an angle grinder steel cutting blade or something else

 

[Chukka63]

cut the blade down with a hacksaw,you'll be surprised how soft the blades are.drill a hole to start your cut.insert the jigsaw blade,keep firm pressure on the jigsaw all the time.