This document specifies the essential dimensions of coil-spring-loaded oil control rings made of steel, of piston ring types SOR (with R-shaped groove) and SOV (with V-shaped groove).
This document applies to coil-spring-loaded oil control rings made of steel with a diameter from 60Ã?Âmm up to and including 160Ã?Âmm for reciprocating internal combustion engines. It can also be used for piston rings in compressors working under analogous conditions.