Spannbreiten

Spannbreiten is a German term used in engineering and manufacturing to describe the width or span that a clamping device, fixture, or workholding element can accommodate. The word combines Spann- (clamp, tension) with Breite (width). In technical catalogs, Spannbreiten specify how large a workpiece can be before the clamp no longer holds securely.

In practice, the Spannbreite of a vise, clamp, or gripper defines the maximum distance between its clamping surfaces or the range of workpiece sizes it can reliably fix. This parameter helps users select appropriate equipment for parts with specific dimensions and ensures stable, repeatable holding during machining, assembly, or inspection.

Measurement and tolerances: Spannbreiten are typically given as a nominal range, for example a 100–200 mm Spannbreite. Tolerances and jaw geometry, including shim spacers, can affect the usable width. Some devices offer adjustable jaws or spacers to extend or refine the Spannbreite. Proper assessment also considers consecutive setups, workpiece shape, and required clamping force.

Usage and translation: In German-language manuals and catalogs, Spannbreiten are a common specification. In English-language documentation, the term is usually translated as clamping range or span width. Understanding the Spannbreite is essential for ensuring proper workholding and avoiding interference with tooling or features of the workpiece.

See also: Workholding, Vise, Clamp, Clamping force.