ISO 5393:2017 download free.Rotary tools for threaded fasteners Performance test method.
Introduction
The test method specified in ISO 5393 is designed to measure the performance of power assembly tools in a laboratory environment. it is not intended as a routine in-plant inspection test.
ISO 5393 is intended
— to enable the producers of power tools to offer their products under standardized technical specifications, and
— to give users of threaded fasteners a method for evaluating and specifying the performance of power assembly tools.
As with the previously published versions. thIs 2017 version of the document remains a fundamental test procedure, with no attempt to set acceptance criteria. Any minimum performance requirements are the responsibility of the user to meet the demands of the particular application for which the tool is Intended for use.
Additional elements have been introduced with this version to address preferred test torque levels, tool performance over a defined number of operating cycles and a method to determine the precision of any torque measurement system which may be included as part of the assembly tool.
As with the previously published versions. ISO 5393 Is applicable to tightening tools of any power source within Its scope. This version more clearly addresses electric powered tools which have become more commonly used in the workplace.
This version includes some changes to the specifications for the test joints and for the test method. These changes reflect the practical esperience gained through the use of the document and are intended to improve the reproducibility of the test method. Results obtained using this version is not expected to be significantly different than results obtained using the previous version.
Information regarding rated torque, test torque and torque adjustment range: The scope (see Last paragraph) allows a test to be performed at any test torque level (see 11). A manufacturer defines a tool’s rated torque (see 111) and its torque adjustment range (see 121). CLause 6 describes a method to identify torque scatter over a defined range of torque adjustment. In theory, a manufacturer could offer a tool with a defined rated torque of 100 Nm, and may choose to identify the performance over a defined torque adjustment range of 60 Nm to 80 Nm (perhaps to satisfy a customer or market requirement). In that case, as specified in CJaue 6.. performance tests will be carried out at 60 Nm and 80 Nm, and should the manufacturer want to Identify the tool’s performance over a defined number of operating cycles, the operating cycle test would be performed at 80 Nm (the upper limit of the defined range of torque adjustment, as specified In 722). Results of the performance tests would then be valid only for that defined range of torque adjustment.
1 Scope
ISO 5393 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 ISO 5393,
— 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 bulltin 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, lncludtng 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 attest joints necessary for a wide range of test torque levels, a list of preferred test torque levels is provided in Annex A.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes reguirements of ISO 5393. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ELJRAMET/cg.14/v.2.0: March-20, Guidelines on the Calibration of StaUc Torque Measuring Devices
3 Terms and definitions
For the purposes of ISO 5393, the following terms and definitions apply.
5 Determination of torque scatter
5.1 General rules for performance tests
5.1.1 Measurements
All measurements carried out in conformity with this document shall be performed by personnel trained In the use of the equipment utilizing Instrumentation, which Is calibrated against existing standard methods.
5.1.2 Ambient condItions
Unless otherwise noted, the ambient conditions shall, during the test, be kept within the rollowing limits:
— ambient temperature: 22 °C ± 5 O(
— relative humidity: below 90%.
5.1.3 Test Installation
The tool shall be connected to the test joint through the measuring instrument. The alignment of these three elements ts important to reduce the influences on measured peak torque.
The tool shall be rigidly fixed in the test stand to prevent any influence by the operator. Diagrams of typical test Installations are shown In Figure 1. FIgure 2 and Figure 3.
The combined torque scatter as a percentage of the combined mean torque shall be considered the tools torque scatter performance at the defined test torque level.
9.3 Torque scatter over a defined range of torque adjustment
Tool performance may be identified over a defined range of torque adjustment by performing two tool performance tests as specified in Clause 6. The combined torque scatter as a percentage of the combined mean torque shall be determined for both the upper limit and the lower limit of the defined torque adjustment range.
If a single torque scatter value (combined torque scatter as a percentage of the combined mean torque) is to be presented for the defined range of torque adjustment, the Larger value at either test torque level shall be chosen.
9.4 Torque scatter over a defined number of operating cycles
Tool performance may be identified over a defined number of standard operating cycles as specified in Clause ZThe combined torque scatter as a percentage of the combined mean torque shall be determined for a new, unused tool and for the same tool alter completing the defined number of operating cycles.
If a single torque scatter value (combined torque scatter as a percentage of the combined mean torque) Is to be presented for a defined number of operating cycles, the Larger value from either performance test shall be chosen.
10 Presentation of test results
10.1 Test report
The following information shall be given in the test report:
a) reference to this document. i.e. ISO 5393:2017.