Use a screwdriver to punch a hole in the metal sheet.
How to use tin snips to cut sheet metal.
The cutters are offset below the handle so you can keep your cutting hand above the work and the compound action allows you to cut thicker material with less effort.
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Pound on the back of the screwdriver with a hammer to puncture the metal and create an opening for the tin snips.
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They are essentially metal cutting scissors that are stronger and more durable than standard scissors.
Compound snips also called aviation snips are color coded.
Pound the screwdriver at the back with a hammer to allow the tin snips into the metal sheet.
There are at least a dozen types of tin snips and choosing just the right one can be confusing.
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Making a circular cutout in a duct is simple using the techniques shown in photos 5 and 6.
Punch a starter hole for a circular cutout with a straight blade screwdriver.
Use curve cutting snips to cut circles.
I d recommend starting your collection with a pair of offsets click here to see.
Tin snips have heavy blades that can cut through thin sheets of metal.
Proceed with the cutting until you complete a circular shape.
Use green snips to cut clockwise and red snips to cut counterclockwise.
If you are committed to learning how to cut sheet metal by hand the cheapest solution by far would be using an aviation snip set.
