Cutting corrugated sheets

[imamartian]

I have some corrugated sheets i need to cut but they are really brittle and just crack. I have tried using a stanley knife, snips and even a little coping saw but can't get a clean cut. Any ideas anyone?

 

[noseall]

angle grinder.

 

[imamartian]

seriously? sounds feasible
what sort of disc, stone cutting ok?

 

[big-all]

plastic or mineral sheets!!!

 

[noseall]

i lay the plastic ones on top of each other and cut through them all.

remove the molten burr once cooled.

any carborundum disc will do.

 

[imamartian]

plastic or mineral sheets!!!

I don't know, i was given them. They are clear, and have an 'angular' curve to them (if that makes sense) as opposed to a smooth curve.

 

[imamartian]

i lay the plastic ones on top of each other and cut through them all.

remove the molten burr once cooled.

any carborundum disc will do.

That's fantastic, thank-you.

 

[big-all]

old plastic can turn extremly brittle

if its more than a few years old may be uncutable

 

[imamartian]

old plastic can turn extremly brittle

if its more than a few years old may be uncutable

yeah i did wonder that. This stuff used to be a bike shelter that was knocked down a few years ago....

 

[Deluks]

They can crack in the cold too. I use a sharp fine toothed tenon saw. You have to go slowly, preferably only cutting on the downstroke.

 

[Bodgeit and scarper ltd]

I use cutting discs on new and old plastic

 

[^woody^]

Don't do what I did years ago when I cut my first plastic sheets - using a jigsaw with a rough wood blade and pendulum and the sheets just flopping over a saw-horse.

I think I'm still paying for all those sheets now. lol

Fine hacksaw blade, in a padsaw handle and really slow .... nowadays!

 

[Hitachimad]

Old roof lights from box profile sheeting by the sounds of it then.

Brittle at the best of times.
Go with the grinder, use a thin metal cutting disc to minimise the heat.