ISO 16047 PDF

according to test requirements such as BS Pt. 2 or ISO This can be expressed in two ways, the Coefficient of Friction µ and the Torque Coefficient (K . ISO FASTENERS – TORQUE/CLAMP FORCE TESTING. DIN EN ISO Fasteners – Torque/clamp force testing (ISO + Amd ) (includes Amendment).

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In order to achieve the desired clamp force with a specified torque, the tightening instructions must assume a total coefficient of friction of the fasteners.

ISO 16047:2005

Uncoated reference parts are oiled to protect against corrosion and later cleaned again. Coefficients of friction cannot be specified using measurement technology. Uso current method amplitude sensitive. A very low total coefficient of friction runs the risk of the fastener working itself loose.

The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email. Instructions for resetting the password will be immediately emailed to you. Virtual Validation FEA can give virtual insight into the structural integrity of new designs before any capital is spent building parts.

The benefits of a subscription: Some of the capabilities at Matrix Engineering Consultants include: The bolt heads lie on a reference base plate or a reference washer. This is not always easy. If the document is revised or amended, you will be notified by email. However, if the fastener and with it the washer is coated with a lubricant, the lubricated base of the fastener is tightened against the lubricated washer on the test bench.


For example, brighteners in the galvanised coat serve to lower the friction between reference part and fastener. By repeating the test on a sample of the fasteners, the variation in the torque-tension relationship, can be established for an application.

Screw connections

This service is not available if you are a URL user where you do not log in with an email address. As kso result, the coefficients of friction calculated from torque and clamp force only really apply to the conditions on the test bench. Not only can FEA show where new parts may have potential issues, it can be used to diagnose failures seen in the field, and also to optimize designs kso order to reduce cost. Nevertheless, coefficients of friction are determined for these parts.

Eddy current method phase sensitive. In practice, tightening instructions often specify fitting fasteners with a specific torque.

BS EN ISO +A – Fasteners. Torque/clamp force testing

We have no amendments or corrections for this standard. If the factor is very high, fasteners need to be tightened with a high torque and the efficiency of the fasteners decreases.

Pressure water jetting test. The testing of fasteners with captive washers is not described in the standard.

Galvanised reference parts do not rust in storage. On some test benches the partial torque is measured in the thread, in others on the base.


BS EN ISO 16047:2005+A1:2012

Your Alert Profile lists the documents that will be monitored. These bases may be of low or high hardness, uncoated or galvanised.

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These are then tightened with the same torque, although the coefficient of friction of the fasteners with captive washers is lower. Technical terms can not always be avoided. If fasteners are lubricated, friction is reduced — this applies both with regard to both external 116047 via grease or wax and integrated lubrication via the addition of a lubricant to the coating. If you need to be able to add standards to the monitoring service, you must register as a user with your own username and password.

If they are fastened too tightly, components and the fasteners themselves may be damaged. The variety around the topic of corrosion and corrosion protection is also in our glossary at home: Torque to Yield Tests MEC can be perform tests on actual fastened assemblies to obtain torque-angle graphs and to establish the torque to reach the yield strength of the bolt.

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