Hionnallinen

Hionnallinen is a Finnish adjective used in technical and industrial contexts to describe a surface finish or process related to hionta, which covers grinding and polishing. The word is formed from the noun hionta and the suffix -linen, producing an adjective that denotes relation to abrading or smoothing by abrasive means.

In practice, hionnallinen refers to finishes achieved by abrasive removal of material to create a smooth, uniform surface. The specific appearance and roughness of a hionnallinen surface depend on the sequence of finishing steps, from coarse to fine abrasives, and may include lapping or buffing stages. The term can describe both the finishing method (hionnallinen finishing) and the resulting surface condition (hionnallinen pinta).

Hionnallinen finishes are valued in manufacturing for reducing friction, improving appearance, and enhancing compatibility with coatings or subsequent treatments. They are common in metalworking but are also used in other sectors such as woodworking, glass and ceramics, and precision optics.

Describing a surface as hionnallinen typically involves considerations of surface roughness and gloss, with industry-specific standards guiding the acceptable level of smoothness. Documentation may reference hionnallinen kiillotus or simply hionnallinen pinta, depending on the context and sector.

See also: hionta; kiillotus; viimeistely.