Torque produces clamp load through friction and geometry
- Torque
The turning moment depends on force and lever arm. Apply the correct tool at the specified component and location.
- Joint preloadThis term
Opposing arrows show the initial force holding mating surfaces together. Preload is a force, rather than the torque reading itself.
- Coefficient of friction
Resistance to sliding depends on the surface pair and conditions. A friction change can alter preload at the same torque.
- Anti-seize compound
The permitted surface compound helps control binding and disassembly. Use the specified torque procedure and protect restricted sealing or contact surfaces.
A tightening moment creates joint preload indirectly. Friction and surface compounds change the relationship between the applied torque and resulting clamp load.
Conceptual forces without torque coefficients or installation values. Use the model-specific procedure for the actual materials, coatings and lubrication.