cut hole in roof?

[Chrisy]

Hi All,

 

Any idea how long it might take to cut a 6" hole in 4mm steel with a jig saw?

[bottle]

My wife asks how many blades have you got?

[Chrisy]

5 new blades

[TandC]

Hello - less than 5minutes in my experience!

 

when I cut holes last year for new roof vents, I purchased a bog-standard hole-cutter saw. It was rubbish and just made a mess of the paint as the teeth stripped themselves off. I don't think it liked the curvature, plus it was a cheapo one.

 

I resorted to the jigsaw and was amazed... having measured, measured and measured again following previous "opportunities to learn" involving cables etc, i simply put a 10mm drill hole in the steel, and then sawed to the line using my Bosch jigsaw, with a standard metal cutting blade set to a high speed. I gave it the odd spray of WD40 as I progressed the cut and it took just a matter of minutes to complete a pretty good finish circle through 6mm steel roof.

 

It's easier than you think....

[JerryP]

this was recently discussed in here.

[Chrisy]

brilliant news - thank you

[Tonka]

circumference of a circle is 3.142 x the diameter so that is 19 inch approx