![]() ![]() The runoff torque is the maximum force it takes to turn the nut back off the stud one counterclockwise revolution. ![]() The run-on torque is the average prevailing torque while turning the nut on the stud seven clockwise revolutions. During production, the nuts are slightly deformed so that the threads create an interference or locking fit with the stud. Torque is tested on self-locking nuts using precision stud standards and production nuts. Delta torque is a performance key characteristic on self-locking fastener systems. Review the following example-an excerpt from Innovative Control Charting 1-to get a sense of how a short run Xbar- s chart works.įigure 1. Short run Xbar and s (Xbar- s) charts can help you identify changes in the averages and standard deviation of multiple characteristics in a limited production run. Process Capability (Cp) and Performance (Cpk) Chart.Individual X-Moving Range (IX-MR) Chart.SPC Glossary: Quality Management Reference.Capability and Cpk Manufacturing Charts.Statistical Process Control (SPC) Implementation. ![]()
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