Hiomalevyn

Hiomalevyn is a Finnish term referring to a grinding plate or backing plate used in abrasive finishing. It functions as a rigid base that supports and secures abrasive media—such as sheets, discs, or polishing pads—during grinding, polishing, or lapping. By distributing pressure and maintaining flat contact with the workpiece, the plate helps produce a consistent finish and reduces the risk of gouging.

Most hiomalevyns consist of a rigid substrate, commonly steel, aluminum, or engineered plastics, sometimes with a compliant layer to dampen heat. They are offered in various thicknesses and sizes to fit different machines and attachments. Many plates use standard attachment systems, such as screw-on housings or clamps, while others are designed for hook-and-loop or other mounting methods for abrasive sheets.

In practice, hiomalevyn is used across metalworking, woodworking, and precision finishing. It is employed on bench grinders, polishing rigs, lapping devices, and similar equipment to back abrasive media and ensure uniform contact with the workpiece. Selection depends on machine type, abrasive grade, workpiece material, and desired finish.

Safety and upkeep are important: inspect for cracks or wear before use, ensure the backing surface is clean and compatible with the abrasive media, and follow operating guidelines to minimize heat buildup and wear.

Etymology: in Finnish, hiomalevy literally means a grinding plate; hiomalevyn is the genitive form used in compound names and descriptions.