Using aviation snips to cut sheet metal requires less effort than using tin snips for the
same task: a compound lever mechanism on the tool provides greater control with less
hand pressure. The serrated jaws prevent slippage and withstand heavy use. Lugs on the
handles help protect your hands from being cut. A metal latch on the side of the tool
holds the jaws closed when the snips are not in use.
Using Aviation Snips
Mark a cut line on the metal. Use aviation snips as you would use scissors on heavy
cardboard. As you cut, open the jaws of the snips fully, and make cuts as long as
possible; if you snap the jaws closed completely at the end of the cut, you'll nick
the edges of the metal. Use an awl or a sharp nail to scribe precise cutting lines
on sheet metal.
Cutting Inside Curves
First drill or punch a starter hole. Then, using right- or left-cutting aviation snips,
make a first cut close to the line to remove most of the waste material. Make a second
pass to snip precisely along the cutting line.
Purchasing
Aviation snips are generally available in a length of 10 inches. All aviation snips cut
straight lines, but some are intended specifically for cutting either right-hand or
left-hand curves. Grips are color-coded: yellow for a tool that makes combination cuts,
red for left-hand curves, and green for right-hand curves.
Substitutes
An alternative to aviation snips is tin snips.
Caution
- Sheet metal, particularly the cut edges, can be very sharp. Be sure to wear heavy work
gloves when handling or cutting it (leather gloves offer the greatest protection).
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