ISO 7113 pdf download

ISO 7113 pdf download.Portable hand-held forestry machines — Cutting attachments for brush cutters — Single-piece metal blades 1 Scope This International Standard specifies the requirements for the material and marking of single-piece metal blades for portable hand-held brush cutters as well as the basic dimensions and tolerances for saw blades for portable hand- held brush saws. 2 Normative reference The following standard contains provision which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 71 1 2:— 1 ) , Machinery for forestry — Portable hand-held brush-cutters and grass-trimmers — Vocabulary. 3 Definitions For the purposes of this International Standard, the definitions given in ISO 71 1 2 apply. 4 Blade surface quality Except for the marking, the blade shall be free from surface imperfections deeper than 0,03 mm. 5 Blade material 5.1 Requirement The material shall not have any cracks visible to the naked eye after being submitted to the bend test in 5.2. 5.2 Bend test 5.2.1 Preparation of specimen Cut a specimen of the blade so that the length is perpendicular to the grain of the material. The specimen shall have a width of (35 ± 5) mm and the length shall be at least 1 0 mm longer than 2H (see figure 1 ). If the grain is not visible, cut three specimens in radial directions with 60° difference. The material shall be unlubricated. Carry out the test in a V-block and using a device to bend the specimen, as shown in figure 1 . The width of the V-block and the device shall be at least 40 mm. The ambient temperature shall be 1 0 °C to 35 °C and the load shall be applied at a rate of 1 mm/s to 1 0 mm/s. 6 Dimensions and tolerances of saw blades These dimensions apply only to saw blades. Dimensions and tolerances shall be in accordance with figure 2 and table 1 . The verification of run-out X (total indicator reading) shall be in accordance with figure 3 and table 1 . 7 Marking The blade shall be...