ISO 6123-3:1985 (R2018)

Specifies classes of dimensional tolerances and test methods for the measurement of dimensions. Defines covered rollers as cylindrical cores, generally of metal, with a cover of rubber or plastics for particular use. They are manufactured in a wide variety of sizes and hardness grades depending on the intended use. - Part 1 and 2 of this standard deal with the requirements for hardness, and the surface characteristics.