Cutting a 25mm square hole in steel

[system 4-50]

Somewhere there is a video of how to make a perfect steel cube - using a lathe. Perhaps it would fit in the hole?

[bizzard]

If using a jigsaw you only need to drill two holes to start the blade, Two diagonally opposite drilled corner holes which will cover all four straught edges.

Edited March 6, 2019 by bizzard

[jenevers]

3 hours ago, bizzard said:

If using a jigsaw you only need to drill two holes to start the blade, Two diagonally opposite drilled corner holes which will cover all four straught edges.

Good point?

[RLWP]

5 minutes ago, jenevers said:

Good point?

Come on, don't leave us in suspenders. What are you installing that needs a 1" square hole?

 

Richard

[WotEver]

3 hours ago, bizzard said:

If using a jigsaw you only need to drill two holes to start the blade, Two diagonally opposite drilled corner holes which will cover all four straught edges.

Less filing to boot

Just now, RLWP said:

Come on, don't leave us in suspenders. What are you installing that needs a 1" square hole?

A square widget, obviously. 

[bizzard]

A pet mouse flap ?

[TheBiscuits]

11 hours ago, jenevers said:

I need to cut a 25mm square hole. 

Now if you needed a 25mm² hole, a 6mm drill bit is close enough, giving you 28.3mm².

 

[blackrose]

8 hours ago, dor said:

Using a 35mm hole saw might reach into the corners, but will be too wide for the desired 25mm square.

I would probably drill the corners and use a jig saw to cut between, or maybe a 25mm hole saw if access is good.

Yes I didn't understand the idea of using a 35mm hole saw either. You'd end up with a hole much too wide. I'd also use a 25mm blacksmith drill bit or 24mn hole saw because the holes always end up a bit bigger, and then cut into the corners with a jigsaw. Finish off with a file. 

 

Do we know what the square hole is required for yet?

[RLWP]

3 minutes ago, blackrose said:

Yes I didn't understand the idea of using a 35mm hole saw either. You'd end up with a hole much too wide

Too wide for what, Mike? To install a switch, probably. To pass a bit of 25mm square tube through - perfect!

 

We don't know what the job is, do we?

 

Richard

Edited March 6, 2019 by RLWP

[Sea Dog]

18 minutes ago, RLWP said:

We don't know what the job is, do we?

Isn't it about exploring the performance envelope of a Dremmel? 

 

[Dr Bob]

6 hours ago, Fly Navy said:

 

Herrings can be quite dangerous in the wrong hands!

I wouldn't mention fish.

[WotEver]

13 minutes ago, Dr Bob said:

I wouldn't mention fish.

Did you hear the one about the two fish in a bowl... 

[Dr Bob]

9 minutes ago, WotEver said:

Did you hear the one about the two fish in a bowl... 

No, but I've heard the one about two fish in a tank.........

[Alan de Enfield]

3 minutes ago, Dr Bob said:

No, but I've heard the one about two fish in a tank.........

Which one worked the gun ?

[TheBiscuits]

Just now, Alan de Enfield said:

Which one worked the gun ?

Bob.

[Dr Bob]

7 hours ago, TheBiscuits said:

Bob.

I didn't remember.

[Fly Navy]

Two fish or not to fish...............