ISO 9518 pdf download

ISO 9518 pdf download.Forestry machinery — Portable chain-saws — Kickback test 1 Scope This International Standard specifies the methodology for determining the kickback potential of a gasoline-powered chain-saw, complete with guide bar and saw chain. This International Standard has been demonstrated to be an accurate method of measurement for evaluating computed kickback angles and energy associated with chain-saw kickback for chain-saws with engine capacity up to 80 cm 3 . It is not intended to evaluate chain-saws with an engine capacity of above 80 cm 3 . Furthermore, because of physical size limitations of the kickback machine, testing of units with guide bar cutting length in excess of 63 cm is not recommended. NOTE — Although this International Standard is applicable to gasoline-powered chain-saws, the kickback machine and test procedure ought to be also suitable for testing of electric powered chain-saws. To aid in application of this test method to electric powered units, some instructions are included in this document that relate specifically to electric chain-saws. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were 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 editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6535:1 991 , Portable chain-saws — Chain brake performance . BOM-01 00, Kickback machine — Bill of materials. 2) 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 bar tip guard shield that prevents contact with the chain at the tip of the guide bar and which may be removable and replaceable 3.2 chain brake lever device, usually the front hand guard, used to activate the chain brake 3.3 computed kickback angle angle used as a measure of the reaction of a hand-held chain-saw, backward and upward toward the user, when subjected to a rotational kickback under simulated conditions See figure 1 . 3.4 contact angle angle between the surface of the test specimen and a perpendicular to the guide bar centreline 3.5 data set group of data points, all taken at the same test conditions 3.6 horizontal system portion of the kickback machine used to measure the horizontal energy of the kickback reaction...