Products + Tools

In applications where a simple spanner used to be sufficient and as customer requirements continue to increase, more bolted joints are requiring the use of a torque wrench or complex precision tool. Here, STAHLWILLE explains why careful handling and the right grip are essential when using a torque wrench.

A torque wrench is not as robust as a spanner, its interior contains sophisticated mechanics and modern versions even feature electronics. Torque wrenches should always be handled carefully to ensure the tool can reliably measure the applied torque and trigger correctly. It is therefore best to transport a torque wrench in the case or tool box to ensure optimum protection. 

Secondly, “don’t overdo it”. A bolted connection is not just defective if the bolt head is sheared off. If a tightening torque is specified, even a slight overrun can result in the connection not meeting the specification. This is why it is so important not to continue applying force after the wrench has triggered – reaction time after the trigger signal is key. Slower reaction to the torque wrench signal means more force is applied to the screw head unnecessarily, risking a poor connection. 

Finally, users must observe the gripping position. It is essential that users hold the torque wrench in the correct position to measure the torque correctly. This is because the torque is calculated from the applied force and force loading point. A force loading point refers to the distance between the user’s hand and the bolting position and, for this reason, many torque wrenches have a marking for the gripping position. 

With STAHLWILLE torque wrenches, the ergonomic shape of the handle also prevents incorrect operation. In addition some STAHLWILLE electronic torque wrenches also feature force loading point compensation, meaning the torque wrench automatically corrects minor deviations.