Definition
A sheet metal cutting tool that removes a narrow strip of material by repeatedly punching small bites along the cut line. It can be hand-operated, electric, or pneumatic, and is used to cut straight lines, curves, or interior openings in aircraft sheet metal without distorting the surrounding material.
Plain English
A tool that cuts sheet metal by taking lots of tiny bites out of it, leaving a clean cut without bending the metal around it.
Context Anchor
Seen in aircraft maintenance and sheet-metal repair, especially when trimming aluminum panels or making shaped openings.
Derivation
From the verb 'nibble,' meaning to take small repeated bites. The tool earns its name because it removes metal in many small punches rather than one continuous cut.
Why Pilots Care
Unlike shears or snips, a nibbler does not bend or curl the surrounding metal, so it is preferred for repair work where the surrounding skin must stay flat and undamaged.
Intuition Check
A nibbler is not a person or a small aircraft part. In maintenance, it means a cutting tool that removes metal in tiny pieces.
Example Sentence 1
The mechanic used a pneumatic nibbler to cut an inspection opening in the fuselage skin.
Example Sentence 2
After tracing the damage outline, he guided the nibbler slowly along the line to avoid warping the thin aluminum.