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Cutting openings in sheet metal ducts. BETA-32 10-21-2007
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Posted by Stormin Mormon on October 23, 2007, 8:01 am
Buy red and green shears. Use the red one while using your right hand, the
green one for when you're using your left hand.

--

Christopher A. Young
.
.


For some reason, I was thinking that there would be no easy way to get tin
snips into the metal and cut along the line without mangling the metal.
Then I watched the video and -- DUH -- I realized that I could just make the
first entry cut in the middle of the area to be removed, and then approach
the actual cut line from an angle and do the cutting from there. I am not
usually this dense.




Radiant Heat 468x60
Posted by Cliff Hartle on October 21, 2007, 10:46 pm
Make sure to get the ones with the right color handles.

There are three different types with a corresponding handle color (I don't
know what color goes with what). One that cuts in a clock wise motion one
that cuts in a counter clock wise direction and one that cut straight. Pick
the one that works the best based upon the circumstances.

http://en.wikipedia.org/wiki/Tin_snips


> Thanks for the youtube.com video link.
>
> I guess tin snips it is, since that's the unanimous view. I didn't even
> try them because I thought that would never work, but obviously I was
> mistaken.
>
> Thanks everyone.
>
>>> I need to cut 2 rectangular openings in an existing HVAC supply and
>>> return
>>> ducts.
>>>
>>> How can I do this?
>>>
>>> I've tried using a power jigsaw with a metal cutting blade -- big mess.
>>>
>>> I see things like power shears when I do Google searches, but that seems
>>> like a whole lot of money to spend to just cut the 2 openings.
>>>
>>> Are there any hand tools or cutting chisels that will work for this?
>>>
>>> Any other suggestions?
>>
>> Here's a DIY video on how it's done. Although this is for a circular
>> collar, its similiar for a rectangle.
>> http://www.youtube.com/watch?v=gSN6L2KgDNA
>>
>
>



Posted by Ralph Mowery on October 21, 2007, 10:48 pm

> Thanks for the youtube.com video link.
>
> I guess tin snips it is, since that's the unanimous view. I didn't even
> try them because I thought that would never work, but obviously I was
> mistaken.
>
> Thanks everyone.
>
>

Instead of tin snips ask for aviation snips. There are 3 types, one that
cuts to the right, one cuts left and one cuts stright. The handles are
usually color coded as to which way they cut.

Here is a place to look at them:

http://www.mytoolstore.com/klein/1102s.html




Posted by John Grabowski on October 22, 2007, 7:43 am

> > I need to cut 2 rectangular openings in an existing HVAC supply and
return
> > ducts.
> >
> > How can I do this?
> >
> > I've tried using a power jigsaw with a metal cutting blade -- big mess.
> >
> > I see things like power shears when I do Google searches, but that seems
> > like a whole lot of money to spend to just cut the 2 openings.
> >
> > Are there any hand tools or cutting chisels that will work for this?
> >
> > Any other suggestions?
>
> Here's a DIY video on how it's done. Although this is for a circular
> collar, its similiar for a rectangle.
> http://www.youtube.com/watch?v=gSN6L2KgDNA
>


I have always called that particular tool "Aviation Snips". I thought tin
snips were the ones that look like heavy duty scissors. In a pinch I have
used BX cutters on sheet metal and they worked well except the handles are
shorter. Consequently you get less leverage with them.


Posted by JoeSpareBedroom on October 22, 2007, 7:59 am
>
>> > I need to cut 2 rectangular openings in an existing HVAC supply and
> return
>> > ducts.
>> >
>> > How can I do this?
>> >
>> > I've tried using a power jigsaw with a metal cutting blade -- big mess.
>> >
>> > I see things like power shears when I do Google searches, but that
>> > seems
>> > like a whole lot of money to spend to just cut the 2 openings.
>> >
>> > Are there any hand tools or cutting chisels that will work for this?
>> >
>> > Any other suggestions?
>>
>> Here's a DIY video on how it's done. Although this is for a circular
>> collar, its similiar for a rectangle.
>> http://www.youtube.com/watch?v=gSN6L2KgDNA
>>
>
>
> I have always called that particular tool "Aviation Snips". I thought tin
> snips were the ones that look like heavy duty scissors. In a pinch I have
> used BX cutters on sheet metal and they worked well except the handles are
> shorter. Consequently you get less leverage with them.
>

This could be an excellent opportunity for him to convince the wife that he
needs to spend $400 on a power tool, even if it's overkill.
http://www.internationaltool.com/boschnibblers.htm



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