Notes on calculating tightening torque when using insertion tool with various effective lengths. - AH00.00-P-0015-01CW
WARNING: This page does not describe the selected car, but rather 203 other vehicles, including the 2020 Mercedes-Benz SLC300, 2020 Mercedes-Benz SL550, 2020 Mercedes-Benz SL450, 2020 Mercedes-Benz S65 AMG, and 2020 Mercedes-Benz GLA250. However, it is still accessible from the selected car via links, so may be relevant.
MODEL ALL
The working length of the insertion tool (2) plugged onto the torque wrench (1) changes the leverage of the torque wrench (1). This in turn alters the actual tightening torque. Therefore the tightening torque to be set has to be calculated as a function of the working length of the insertion tool (2) and the specified tightening torque.
The following formula is used to calculate the torque to be set.
b Effective length of torque wrench
c Internal caliper of adjusting tool
d Internal caliper of insertion tool
MDE torque to be set
MDE = (MDV*(b+c))/(b+d)