We've been doing quite a bit of HVAC work of late as we get ready for the heat of summer and the various items necessary for the master bathroom renovation. From demolition of horrendously installed duct work, to custom fabrication of vent boots, even the most minor work that needs to be performed on ducts requires the right tools.
Over the years I've gotten more and more comfortable with the work we've been doing in our home's ducts. But my comfort with the work we've done has been due in no small part to the correct selection of my set of snips that I purchased years ago.
When we were just starting to work on HVAC I knew I'd need a pair of straight cutting metal snips, so I headed out and picked up a pair of compound action snips with an ergonomic handle. There are many different kids out there, from the snips that look like simple oversized scissors, to ones that are actually pneumatic, but a basic middle of the road compound cutting tool should do just fine for most purposes.
The compound movement of these snips allow them to cut up to 18 gauge metal with relative ease. You don't have to exert a tremendous amount of force to get through the material, and it tends to make a nice clean line. This isn't to say you won't get a good forearm workout if you're cutting a lot of metal during a project.
These straight cutting snips are what I tend to use in probably 75% of situations where I need to cut metal for duct work. They have a small set of blades, allow you to begin cutting from a point, and they make a nice and straight line without damaging either side of the cut. Some snips will leave one side crisp while bending and folding the other side out of the way.
I used these straight cutting snips to make the small cuts in the corners of the duct boot last week. They did just what I needed and left me with a good edge to work with.
As useful as the straight cut snips are, there are often times where you need to make a curved cut. While the straight snips will work on a soft curve to a certain extent, if the bend of the curve gets at all tight you'll end up wrestling more with the snips and the metal than you will end up making progress. That's when the second set of snips comes into play.
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