Which type of bucking bar is typically used to install rivets in an assembly?

The bottle style bucking bar is specifically designed for installing rivets in an assembly due to its unique shape and functionality. The bottle-shaped design allows for better access in tight spaces and provides a good grip, making it easier for the mechanic to apply the necessary force to the rivet while creating a strong bond. The weight distribution of a bottle bucking bar maximizes impact efficiency, which is crucial for forming the rivet properly without damaging surrounding materials.

In contrast, although flat style bars are commonly used in certain applications due to their ease of use on flat surfaces, they may not be as effective in tighter or more complex assembly environments. Round style bars can also be used, but they don't provide the same level of control as bottle style bars do, particularly when dealing with rivet installation in difficult-to-reach areas. Custom style bars are usually designed for specific applications or bespoke tasks, which may not be suitable for all standard riveting processes. Therefore, the bottle style bucking bar is the preferred choice for general rivet installation in aerospace assembly work.