Kohdistusnupit

Kohdistusnupit are mechanical devices used to position parts with high precision in assemblies. They are typically cylindrical pins or studs that fit into corresponding holes on mating components, providing repeatable alignment during assembly, testing, and servicing. Kohdistusnupit are common in machine tools, fixturing, jigs, and enclosures, as well as in automotive, electronics, and industrial equipment.

The most common forms are plain cylindrical dowel pins, spring pins, and threaded alignment studs. Plain dowel pins are designed for an interference fit in one part and a clearance hole in the mating part, creating accurate alignment when assembled. Spring pins are used for quick assembly and disassembly, while threaded studs allow adjustable or removable alignment features. In some applications, precision dowel pins and hardened variants are used for repeated use in high-accuracy environments.

Materials and standards typically include carbon steel, alloy steel, and stainless steel, with heat treatment to improve hardness and wear resistance. Many kohdistusnupit are manufactured to DIN or ISO standards, which specify dimensions, tolerances, and fit types to ensure interchangeability and predictable performance. Common considerations when selecting nupit include diameter, length, hardness, corrosion resistance, and the compatibility of hole tolerances in the mate parts.

Installation and maintenance focus on proper hole preparation, alignment, and cleanliness. Holes should be accurately drilled or reamed, and pins pressed into place with appropriate fit and lubrication if needed. Worn or deformed pins should be replaced to maintain alignment accuracy. Regular inspection helps ensure continued repeatable positioning in production or tooling environments.