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ISO 5718-2013 pdf free download

ISO 5718-2013 pdf free download.Harvesting equipment — Blades for agricultural rotary mowers — Requirements
Matériel de récolte — Lames pour faucheuses rotatives agricoles — Prescriptions.
This ISO 5718 specifies requirements for blades used on rotary disk mowers and rotary drum mowers, mounted, semi-mounted, trailed, or self-propelled, as used for forage crop harvesting in agriculture only.
It specifies requirements for testing and marking of such blades.
NOTE I The main purpose of this International Standard is to set material characteristics. Blades on agricultural rotary mowers are exposed to considerable centripetal forces and impacts with foreign objects. A bend test and impact test to check the brittleness and toughness of the material is therefore included in this International Standard.
NOTE 2 This International Standard does not specify dimensional requirements.
2 Normative references
The following documents, in whole or in part, arc normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 6508.1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H, K,N,T)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
rotary mower
mower in which one or more functional components cut or shear forage crop by impact without mulching and rotate about a vertical axis
drum mower
rotary mower (j) where the drive line is above the path of the cutting elements
Note 1 to entry: See Figurel.
bending zone
area in which the blade is deformed by the bend test
Note 1 to entry: See Figure 3.
4 Requirements for blades
4.1 Material requirements
Blades shall be made of steel chosen by the manufacturer. The values of Rockwell hardness shall be at least 38 NRC, In accordance with ISO 6508-1. The degree of brittleness shall meet the requirements of
4.2 Test procedures for blades
4.2.1 Bend test
The blade shall progressively be bent within the bending zone with an inside radius r = 16 mm (see
Figure 3), at least through an angle a (see Table 1). and with a minimum test speed of the ram of 20 mm/s.
The width of the ram and of the bearings shall be at least equal to or greater than the width o’the blade
to be tested.ISO 5718-2013 pdf free download.

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