NF ISO 5718-2, U31-013-2 (06/2023)

This document specifies requirements for blades used as cutting elements on large rotary mowers (as defined in ISO 4254-13) for impact shredding of crop residues, grass and small bushes. It specifies the testing and marking requirements for these blades. This document does not apply to blades used on: — rotary disc mowers and rotary drum mowers and mower mulchers designed for harvesting forage, as covered by ISO 4254-12; — hand-operated mowers; — walk-behind mowers; — lawn mowers covered by the ISO 5395 series. NOTE 1 The main objective of this document is to determine the characteristics of materials. The blades on large rotary mowers are exposed to considerable centripetal forces and impacts with foreign objects. A folding test and a Charpy impact bending test intended to verify the fragility and strength of the material are therefore included in this document. NOTE 2 This document does not specify dimensional requirements.
(Automatic translation from French)