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Sharpened metal drop-point blade Naturally occurring sharp obsidian piece Shark tooth with a sharp, serrated edge A sewing needle comes to a sharp point. Sharpness refers to the ability of a blade, point, or cutting implement to cut through materials with minimal force, and can more specifically be defined as the capacity of a surface to initiate the cut. [1]
This edge is then refined by honing until the blade is capable of cutting. The extent to which this honing takes place depends upon the intended use of the tool or implement. For some applications an edge with a certain amount of jaggedness is acceptable, or even desirable, as this creates a serrated cutting edge. In other applications the edge ...
The serrated edges of tiger shark teeth A hunting knife with a serrated back edge Serrated leaves of the stinging nettle, Urtica dioica A Meyerco bolt action knife, designed by Blackie Collins, and featuring a partially serrated blade. Serration is a saw-like appearance or a row of sharp or tooth-like projections. A serrated cutting edge has ...
Blades function by concentrating force at the cutting edge. Design variations, such as serrated edges found on bread knives and saws, serve to enhance this force concentration, adapting blades for specific functions and materials. Blades thus hold a significant place both historically and in contemporary society, reflecting an evolution in ...
There are also cutting boards made of glass, steel, or marble, which are easier to clean than wooden or plastic ones such as nylon or Corian, but tend to damage knives due to their hardness. Rough cutting edges—such as serrated knives—abrade and damage a cutting surface more rapidly than do smooth cutting implements.
Right cutting and left-cutting compound-action snips, respectively; the green snips are an offset-pattern Straight-cutting compound-action snips. Compound-action snips, also known as aviation snips, maille snips or sheet snips, are the most popular type of snips as they are able to exert a higher force compared to other types of snip of the same size, because of the design of their linkage.
In machining, the rake angle is a parameter used in various cutting processes, describing the angle of the cutting face relative to the workpiece. There are three types of rake angles: positive, zero or neutral, and negative. Positive rake: A tool has a positive rake when the face of the cutting tool slopes away from the cutting edge at inner side.
A glass knife is a knife with a blade made of glass, with a fracture line forming an extremely sharp cutting edge. Glass knives were used in antiquity due to their natural sharpness and the ease with which they could be manufactured. In modern electron microscopy glass knives are used to make the ultrathin sections needed for imaging.