Nutzlänge

Nutzlänge is a term used in engineering to describe the usable or functional length of a component. It refers to the portion of an object that actively participates in its intended function, while portions reserved for mounting, connections, tolerances, or end effects are excluded. The exact definition can vary by application and industry, and it is often specified in technical drawings or standards.

In fasteners and joints, Nutzlänge typically denotes the length of the element that actually engages with mating parts and contributes to load transfer. For example, in a bolt or screw, the Nutzlänge is the portion that lies within the joint and carries shear or tensile load, while the head, unthreaded shank, or portion beyond the nut may not be considered part of the Nutzlänge.

In shafts, cables, or rods, Nutzlänge refers to the segment that is loaded or used to transmit motion and force. It is the length over which the component participates in bending, torsion, compression, or other functional effects, excluding regions at ends supported by bearings, anchors, or connectors.

Determination of Nutzlänge is usually done from design specifications or drawings. It helps in assessing mechanical properties, such as allowable loads, fatigue life, and assembly tolerances, and is important for ensuring that a part meets functional and safety requirements.

See also: usable length, effective length, engagement length, design tolerances.