Messschiebers

Messschiebers are measuring instruments used for precision linear measurements. They consist of a fixed body with a sliding jaw that forms two sets of jaws for external measurements, a depth probe, and a main scale. In common usage the term refers to the family of calipers that read measurements from a sliding scale, including Vernier calipers, dial calipers, and digital calipers. Some models also provide internal jaws for measuring holes or bores and a depth rod for depth measurements.

Types and readouts: Vernier calipers use a sliding vernier scale to interpolate measurements between the main scale marks. Dial calipers replace the vernier scale with a rotating dial, which indicates the fractional part of the measurement. Digital calipers display the measurement directly on an electronic readout. All variants typically offer readings for external dimensions, internal dimensions, and depths, though the specific features can vary by model.

Operation and use: the object to be measured is placed between the jaws, and the movable jaw is advanced until it just contacts the object. The instrument is then read or zeroed at the contact point to establish a reference. Proper technique requires careful alignment and consistent pressure to avoid parallax error or deformation.

Applications: Messschiebers are widely used in metalworking, mechanical engineering, manufacturing, quality control, and laboratory settings for tasks such as checking part dimensions, inspecting tolerances, and during setup and inspection processes.

History and terminology: the word Messschieber comes from German, literally meaning measuring slider. The Vernier variant traces its historical development to Pierre Vernier in the 17th century, enabling finer readings. Messschiebers remain common as versatile, hands-on measurement tools alongside micrometers and other precision instruments.