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{{Short description|Tool for cutting sheet metal}}
{{other uses|Nibble (disambiguation)}}
{{Expand language|topic=|langcode=de|otherarticle=Nibbeln|date=June 2020}}
[[File:nibbler1.jpg|thumb|Manual nibbler, punch-and-die type]]
A '''nibbler''' (or '''pair of nibblers'''<ref>{{cite book |title=ASD Technical Report |date=1963 |publisher=Aeronautical Systems Division, Air Force Systems Command, United States Air Force |page=157 |url=https://www.google.co.uk/books/edition/ASD_Technical_Report/j2mVYC5OyWkC |language=en |quote="If a motorized tool is not available, then a pair of nibblers will have to be provided. This is a hand tool with which the puncture can be progressively cut out."}}</ref>) is a tool for cutting sheet metal with minimal distortion. It may be used for "[[nibbling]]": cutting a contour by producing a series of overlapping slits or notches.

One type of nibbler operates much like a punch and die, with a blade that moves in a linear fashion against a fixed die, removing small bits of metal and leaving a [[Saw#Terminology|kerf]] approximately {{convert|6|mm|abbr=on}} wide.  Another type operates similar to tin snips, but shears the sheet along two parallel tracks {{convert|3-6|mm|abbr=on}} apart, rolling up the waste in a tight spiral as it cuts.  

Nibblers may be manual (hand operated) or powered. Power nibblers are often powered by [[compressed air]], though electrical types also exist. A common [[Do it yourself|DIY]] nibbler tool is an [[electric drill]] attachment, which converts the rotary motion of the drill into a reciprocating motion of the jaw.

<gallery>
File:nibblerdetail1.jpg|Detail of cutting bit of manual nibbler, punch-and-die type
File:nibbler2.jpg|Shear-type nibbler and detail of cutting head
</gallery>

== References ==
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{{Power tools}}
{{Metalworking navbox|formopen|tool}}

[[Category:Cutting tools]]
{{Cutting and abrasive tools}}<!-- For cutting non-metals -->

[[Category:Metalworking cutting tools]]
[[Category:Fabrication (metal)]]


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