Why is Bolting Necessary? Bolting is the process of joining two or more components using bolts—mechanical fasteners that, when tightened, create a clamping force. This clamping force generates friction between the parts to keep them securely connected and transfer loads (tension, shear, or even bending) across the joint. In essence, bolting is necessary because it provides a reliable, removable, and often cost‐effective way to assemble structures or machines while ensuring that the connection remains stable under dynamic or cyclic loads.

  What is the function of bolting? The functions of Bolting

  1. Clamping Force Generation

   The primary function is to create a clamping force that holds two or more parts in firm contact. This force resists separation caused by external loads.

   2. Alignment and Positioning

   Bolts ensure precise alignment of components during assembly. For instance, in bridge construction, bolts align steel girders to millimeter-level accuracy.

  3. Vibration Damping

   Bolted joints absorb and dissipate vibrational energy, protecting sensitive equipment. Locknuts or thread-locking adhesives enhance this function by preventing self-loosening.

  4. Sealing

   In pressurized systems (e.g., pipelines, hydraulic cylinders), bolts compress gaskets to create leak-proof seals.

  5. Safety Redundancy

   Multiple bolts in a joint provide redundancy. If one bolt fails, others maintain structural integrity, crucial in safety-critical applications like aircraft assembly.

   When a bolt is tightened, it elongates slightly, which compresses the connected parts. This preload not only holds the joint together but also prevents slippage between surfaces. Additionally, bolted joints are advantageous because they allow for easy disassembly and repair—a key factor in many industries like automotive, aerospace, and construction.