A bitting is the part of the key that actually engages the tumblers to activate the lock. Bittings are often represented as a code which instructs how a key is to be cut by a locksmith. The bitting is usually a series of integers (e.g. 372164) that is usually translated from a key code chart or from a bitting code list and the use of specially designed key machines. One American manufacturer, Eagle Lock Company, used letters exclusively for bitting codes.

Each digit in the bitting corresponds to a different cut or notch on the key and represents the depth at which the key must be cut. Each number in a bitting represents not only the depth of which the key blank is to be cut, but also the location of the cut on the key blank. Depending on the maker, the bitting sequence can be from bow-to-tip (the bow being the larger, handle portion of the key), or can be from tip-to-bow as is in the case of Best Locking Systems and Assa. A smaller number is typically a shallower cut on the key, but not always. Assa bitting codes are reversed, where the higher the digit, the shallower the cut.

Locksmiths can cut to the code given when supplying a lost key or making a new restricted key copy. See also:Keys by code

Angularly bitted

This is a type of key where the individual cuts are designed to engage chisel-pointed pins in high-security locking systems manufactured by Medeco and Emhart. These angled cuts are designed to lift each tumbler to a predetermined height to the shear line and to rotate them to a specific angle to engage a sidebar mechanism (Medeco) or to line up an interlocked pin to such a position to where it would allow the plug to rotate (Emhart).

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Look at other dictionaries:

  • Bitting — Bit Bit, v. t. [imp. & p. p. {Bitted}; p. pr. & vb. n. {Bitting}.] To put a bridle upon; to put the bit in the mouth of. [1913 Webster] …   The Collaborative International Dictionary of English

  • bitting — /bit ing/, n. one of the indentations on the bit of a key. [BIT1 + ING1] * * * …   Universalium

  • bitting — noun the part of a key that engages the tumblers to activate the lock Syn: key bit …   Wiktionary

  • bitting —   n.    1. the number(s) which represent(s) the dimensions of the key    2. the actual cut(s) or combination of a key …   Locksmith dictionary

  • bitting — …   Useful english dictionary

  • Bitting rig — A bitting rig or bitting harness is a training tool for horses that can teach a horse to accept a bridle and bit, and later assist a horse in developing the necessary musculature for a given equestrianism discipline. Generally used in conjunction …   Wikipedia

  • bitting orientation —   n.    the specification of how a written combination is to be applied to bitting positions of a key (tip to bow, etc.) …   Locksmith dictionary

  • bitting depth —   n.    the depth of a cut which is made into the blade of a key …   Locksmith dictionary

  • bitting list —   n.    a listing of all the key combinations used within a system. The combinations are usually arranged in order of the blind code, direct code, and/or key symbol …   Locksmith dictionary

  • bitting position —   n.    the location of a key cut …   Locksmith dictionary