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A synthetic material composed of boron and nitrogen (1:1) that is almost as hard as diamond, used as a superabrasive powder and for cutting and grinding applications.



Related Terms

GEOSYNTHETIC

Any synthetic material used in geotechnical engineering, such as geotextiles and geomembranes.

NIBBLING

Contour cutting of material by the action of a reciprocating punch that takes repeated small bites as the work is passed beneath it.

PLASMA TORCH

A torch in which temperatures as high as 50,000 C are achieved by injecting a plasma gas tangentially into an electric arc formed between electrodes in a chamber; the resulting vortex of hot gases emerges at very high speed through a hole in the negative electrode, to form a jet for welding, spraying of molten metal, and cutting of hard rock or hard metals.

DIAMOND ORIENTATION

The set of a diamond in a cutting tool so that the crystal face will be in contact with the material being cut.

CUTTING EDGE

  1. The point or edge of a diamond or other material set in a drill bit. Also known as cutting point. 2. The edge of a lathe tool in contact with the work during a machining operation.

BASE STOCK

The base fluid, usually a refined petroleum fraction or a selected synthetic material, into which additives are blended to produce finished lubricants.

INSERT BIT

A bit into which inset cutting points of various preshaped pieces of hard metal (usually a sintered tungsten carbidecobalt powder alloy) are brazed or hand-peened into slots or holes cut or drilled into a blank bit. Also known as slug bit.

FILE HARDNESS

Hardness of a material as determined by testing with a file of standardized hardness; a material which cannot be cut with the file is considered as hard as or harder than the file.

CUTOFF WHEEL

A thin wheel impregnated with an abrasive used for severing or cutting slots in a material or part.

CONSTANT-VELOCITY RECORDING

A sound-recording method in which, for input signals of a given amplitude, the resulting recorded amplitude is inversely proportional to the frequency; the velocity of the cutting stylus is then constant for all input frequencies having that a design plan for material and equipment into a project ready for operation.

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