nibbler

A nibbler is a type of tool used for cutting sheet metal. It operates by shearing small, overlapping portions of the metal, creating a clean cut without distortion or producing large amounts of scrap. Nibblers are available in both manual and powered versions. Manual nibblers, often referred to as hand nibblers, are compact and require manual force to operate the cutting jaws. Powered nibblers, which can be electric, pneumatic, or hydraulic, utilize a punch and die mechanism to achieve a similar shearing action but with greater speed and less effort.

The cutting action of a nibbler involves a reciprocating punch that moves up and down through a stationary die. As the punch moves down, it shears a small piece of metal, which is then ejected. The tool is guided along the desired cut line, with each stroke removing a small "nibble" of material. This process allows for intricate shapes and curves to be cut with precision. Nibblers are particularly useful for cutting corrugated metal, metal roofing, and other sheet metal applications where a clean, distortion-free edge is required. They can also be used for cutting plastic and other sheet materials. The width of the cut, known as the "nibble width," determines the tool's efficiency and the smoothness of the edge. Different types of nibblers are designed for various thicknesses of material.