URYU POWER TOOLS GENERAL CATALOG
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3) Triaxial Vibration Values and Single Direction Vibration ValuesThere is no fixed relation between triaxial vibration values measured in accordance with ISO 28927 series and one single direction vibration values measured in accordance with ISO 8662 series. Therefore, it is adequate to compare values from the same tool type, referring to the same part of the same standard.4) Risk Assessment & Risk ManagementUsing hand-held power tools may cause hand-arm vibration syndrome*1 and carpal tunnel syndrome*2. We recommend risk assessment and regular health checks of the workforce for early symptoms which may relate to vibration exposure to prevent problems developing.*1: Hand-arm vibration syndrome affects the nerves, blood vessels, muscles and joints of the hand, wrist and arm. It includes vibration white finger, which can cause severe pain in the affected fingers.*2: Carpal tunnel syndrome is a nerve disorder which may involve pain, tingling, numbness and weakness in parts of the hand, and can be caused by, among other things, exposure to vibration.The declared values were obtained by laboratory type testing in accordance with the stated standards and are suitable for comparison with the declared values of other tools tested in accordance with the same standard. These declared values are not adequate for use in risk assessments. Values measured in individual work places may be higher. The actual exposure values and risk of harm experienced by an individual user are unique and depend upon the way the user works, the workpiece and the workstation design, as well as upon the exposure time and the physical condition of the user.We, URYU SEISAKU, LTD., cannot be held liable for the consequences of using the declared values, instead of values reflecting the actual exposure, in an individual risk assessment in a work place situation over which we have no control.Attention ! ISO 28927-2 is applicable to all hand-held tools for threaded fasteners, but ISO 28927-2 adopts a procedure for testing tools with an impact or impulse mechanism using a test device based on break blocks acting on the outer diameter of a test socket, and a free running test for other type of tools without an impact or impulse mechanism. Therefore, it may not be adequate to compare a value from an oil-pulse tool (under load) and one from a nutrunner without impact or impulse mechanism (free running).-Manage the risk by reducing the exposure to vibrations. ・Employ work process or a tool which has lower vibrations. ・Employ work process or a tool which can do the job more quickly.-Check tools and accessories before using them to make sure that they have been properly maintained and repaired to avoid increased vibration caused by faults or general wear.-Support the weight of the tool in a stand, tensioner or balancer if possible.-Avoid gripping or forcing a tool more than you have to. The risk from vibration is generally greater when the grip force is higher.-Encourage good blood circulation by: ・keeping your hands warm and dry. ・massaging and exercising your fingers during work breaks.We would recommend ‘ISO 5349-1’ and ‘ISO 5349-2’ for human exposure to hand-transmitted vibration measurement at workplace, for risk assessment.Noise & Vibration Emission ValuesNOISE & VIBRATIONNOISE & VIBRATION87POWER TOOLS GENERAL CATALOG

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