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ISO 5393

3rd Edition, November 2017

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Rotary tools for threaded fasteners - Performance test method

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Description / Abstract:

This document specifies a laboratory performance test method for power assembly tools (referred throughout the document as “tool”) for installing threaded fasteners.

It provides a method for the measurement of torque repeatability (scatter)

— over a range of torque rates as specified in this document,

— over a range of torque adjustment as defined by the manufacturer, and

— over a number of operating cycles as defined by the manufacturer.

It provides a method for the measurement of the precision of the built-in torque measurement system for tools incorporating such a feature. See Annex E.

It gives instructions on equipment parameters, what to test for and how to evaluate and present the test data.

It is applicable to tools

— of any power source, e.g. pneumatic, hydraulic, and electric, including battery-powered,

— which apply torque in a generally continuous manner, and

— within the torque range 0,5 Nm to 2 000 Nm. Outside this range, it is acceptable to modify the test method providing that the modification is documented in the test report.

It is not applicable to

— impact or impulse wrenches,

— ratchet wrenches or wrenches with ratcheting clutches, and

— other tools which advance fasteners in discontinuous increments, overcoming static friction at each increment.

It allows a test to be performed at any test torque level; however, in order to minimize the number of test joints necessary for a wide range of test torque levels, a list of preferred test torque levels is provided in Annex A.
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