Calculating Clamp Force: Why It’s Vital for Bolt and Nut Selection

Keywords: Bolts, Nuts, High-Strength BoltsThe primary job of a bolt and nut assembly is to generate clamp force, which holds parts together. This force is a function of the bolt’s preload (achieved via torque), its tensile stiffness, and the joint’s design. Using high-strength bolts allows for higher preloads, which translates to greater clamp force and joint stability. This article explains the basic calculations and factors (like friction, relaxation) that engineers consider to ensure a connection won’t loosen or fail under operational loads.