Kartiomittarit

Kartiomittarit are precision measuring devices used in metrology to check conical surfaces and tapers of cylindrical parts. They consist of a set of tightly controlled, precisely ground conical surfaces, each with a defined apex angle and diameter. The gauges serve to determine whether a workpiece conforms to specified conicity, particularly where a tapered fit is required.

There are two main categories: external cone gauges, used to assess outside surfaces or a shaft’s taper, and internal cone gauges, used to inspect inside bores or holes for conicity. Kartiomittarit can function as reference standards, go/no-go gauges, or as part of calibration sets. They are commonly used in quality control to verify that parts will assemble correctly with mating components that rely on a conical geometry.

Construction and calibration typically involve high-grade tool steel or carbide, with the cones hardened and ground to high precision. Sets are often accompanied by master cones or calibration references to ensure traceability to national or international standards. Regular calibration and careful handling are essential to maintain accuracy, along with clean, dry surfaces and stable environmental conditions.

Usage involves aligning the workpiece feature with the appropriate cone and introducing the gauge so that it makes uniform contact. A proper fit indicates conformity to the specified conical dimension; a loose or excessive fit signals deviation in taper or conicity. Kartiomittarit are widely employed in machining, toolmaking, and assembly processes to ensure reliable tapered connections and proper seating of components such as spindles, sleeves, or collets.

See also: gauge, taper gauge, go/no-go gauge, conicity.