ISO International Standard

This document specifies requirements for blades used as cutting elements on large rotary mowers (as defined in ISO 4254–13) for shredding crop residue, grass and small brush by impact.

It specifies requirements for testing and marking of such blades.

This document is not applicable to blades used on:

—    rotary disc mowers, rotary drum mowers, and flail mowers designed for forage crop harvesting as covered by ISO 4254‑12;

—    arm-type large rotary mowers;

—    pedestrian-controlled motor mowers;

—    lawn mowers covered by the ISO 5395 series.

NOTE 1    The main purpose of this document is to set material characteristics. Blades on large rotary mowers are exposed to considerable centripetal forces and impacts with foreign objects. A bend test and Charpy impact test to check the brittleness and toughness of the material are therefore included in this document.

NOTE 2    This document does not specify dimensional requirements.