Back tooth of a saw and a straight edge . not a polite cutter that makes a mess .
golfdiver,
Feb 23, 1:32am
Even using the score and snap method, you would be very lucky to get a perfect line. I really think you need to use a small timber bead over the cut edge. Look forward to the photos
friendly_prawn,
Feb 26, 6:27am
Tins arrived. Now ready to be cut. Can I ask, what is this tool?
I'd experiment on an off-cut with an angle grinder and cut-off disc, since you already have them (and assuming you're adept at using them). Use masking tape on the line you want to cut, and cover the remaining sheet with cardboard or something, so you don't get sparks on it. Afterwards, if there's no bubbling or lifting of coatings around the cut, go for it. Just deburr and paint the cut edge of the finished panels with duragalv or similar. I suspect the recommendation to use nibblers or shears is just the manufacturer covering their butt, which is fair enough for roofing jobs and colorsteel.
jmma,
Feb 26, 7:54am
That is not for tin Lol
friendly_prawn,
Feb 26, 8:22am
I tried a stanley knife. Broke the blade twice trying to score the tin. So moved on to tin snips. lenghways it just made a mess and the cut wasn't acurate enough. Im thinking either using a diamond metal cut off blade I have which would do the job.It will work and its free. I already have one. Even if the diamond cut off blade causes rust Im thinking I can paint the edges with a rust killer / primer and its goig to be out of sight behind the wood framing stirip Im going to hve to put around it.
Otherwise its looking like buying a nibbler might be my next cheapest option. At $60 / $70 not the end of the world.
Unless there is something else i have missed.
friendly_prawn,
Feb 26, 8:22am
yeah worked that out.
friendly_prawn,
Feb 26, 8:23am
Snap. Yep as my last post. Im thinking this is the way to go. And rust isnt the end of the world. its easily sorted these days.
Our panel shop uses that type of nibbler/shear and one of them is over 30 yrs old and still working.
The kids toy that punches out little half moons of steel is just junk in comparison to a proper shear.
friendly_prawn,
Feb 26, 2:59pm
To do a one off small job?
golfdiver,
Feb 27, 10:28am
Actually they are fantastic for lengthways trimming sheets of colorsteel. As I’ve repeatedly said, it needs a bead or a flashing however.
friendly_prawn,
Mar 4, 3:06pm
Just used a very thin grinding wheel which the shop sold me for cutting metal. Turns out the diamond tipped cutting blade i was using was for tiles. Kinda wrecked it lol. Grinding wheel did the trick though.
Easy peasy. A little rough but not noticable unless you want to inspect it up real close. I tried using tin snips again. They are a complete disaster. Impossible to get a nice straight edge even being careful.
At least with the grinding / metal cutting wheel I could use it sideways to smooth out any rough bits after it was cut to size. (if that makes sense)
I tried using a 9 inch angle grinder and cut off disc for cutting corrugated iron. It was no good. It heats up the iron and melts the galv on the extreme edge, it also makes long thin sharp swarf steel strips. If i was doing the cutting on the grassy lawn, those strips got into the dirt, hidden but there to cut your feet and fingers, and cat paws, It also wore the cut off disc something amazing, faster than even thick steel plate, cutting several sheets at once helped but in the end I would not bother trying it out again.
There's a special skillsaw blade for corrugated iron, its like a normal blade, but instead of teeth or tips like a normal blade, with a 'V' in between them. Its just a normal series of 'U' shaped notches, teeth with a square edge really. Damn noisey, but it works. Hardly any wear on the blade eitherr
friendly_prawn,
Dec 15, 2:18am
The blade I bought was recommended for cutting heavy steel so I dont think corruated iron is ever going to be an issue.
Re sharp left overs? On garage floor, so easily swept up later.
Noisey? I just used ear muffs.
It did heat up the edges at times to the point of being red. To ensure against rust I have painted all edges with crc rust converter. It's a primer as well as a rust converter so even if there is no rust to convert, should prime it. Funny enough I thought only rust made crc turn black when painted on. Yet all the edges did turn black as I painted this stuff on.
And if an issue later, I can give it another paint with rust converter, then just put some beading around it to hide the edges. But then I should imagine, even if it does rust, that'll take years.
And hey, at $13 a sheet, x 6. No biggy. cheap enough to replace.
:-)
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