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Screw assembly error – 15,000 cars recalled to the factory! Headlines such as these shatter car owners’ confidence and damage the image of an automobile manufacturer. A car contains around 1200 to 1400 screws and various assembly tools are employed in the automotive sub supply industry as well as by the OEM manufacturer. Diverse safety requirements set high demands on quality management. DEPRAG SCHULZ GmbH & CO. now has a calibration laboratory accredited by the Deutscher Kalibrierdienst (DKD), in which torque testing instruments can be checked and recalibrated with the highest precision.

Roughly 12 kilos of screws are used in the construction of a medium sized vehicle. 15 percent of these are subject to the safety hazard marking “Danger to life and limb”. Precision and stability is vital for these components! If brakes fail, a resulting accident could have catastrophic effects. If paneling constantly rattles, although this does not influence safety, it does affect customer satisfaction. Both cases could be caused by an incorrect torque setting. It is then no surprise that the accuracy of assembly tools is top priority for the automobile industry. Therefore modern assembly tools are equipped with torque transducers which are responsible for control, documentation and recording of torque values during assembly.