What does the term "breaker ply" of a belt refer to?

The term "breaker ply" refers to a specific layer in the construction of a belt that is designed to absorb shock and provide additional strength and durability. This layer is typically situated beneath the outer fabric layer, often referred to as the carcass, and acts to enhance the belt’s resistance to impact and stress during operation. By including a breaker ply, manufacturers can improve the overall performance and lifespan of the belt, especially in applications where heavy loads and abrupt changes in direction are common.

In contrast, other components like the layer under the snub pulley, mechanical fasteners, or larger head pulleys serve different purposes related to the overall assembly and function of the belt system but do not pertain to the role of the breaker ply in shock absorption and structural support.