6V0937 bulldozer segment bolt and nut D6

Sprocket bolts and segment bolts are both types of bolts found in heavy machinery. Sprocket bolts are used for fastening sprockets, which are toothed wheels that interlock with chains or tracks to transfer power or movement. On the other hand, segment bolts are used in segmented tracks typically utilized in heavy equipment such as excavators and bulldozers. They are specifically utilized to secure individual track segments altogether to create a continuous track. To sum up, while sprocket bolts serve their purpose in sprockets, segment bolts are utilized exclusively for segmented tracks.

 

The main distinction between 12.9 and 10.9 segment bolts lies in their strength levels. The numbers 12.9 and 10.9 denote the grade of hardness of the bolt material, which is measured in tensile strength (i.e., the force required to break the bolt).
Compared to a 10.9 bolt, a 12.9 segment bolt is significantly harder and stronger. It boasts a minimum tensile strength of 1220 MPa, while a 10.9 bolt has a minimum tensile strength of only 1040 MPa. This means that a 12.9 bolt can easily handle heavier loads and greater stress than a 10.9 bolt.
In the context of heavy machinery, using high-strength bolts such as 12.9 is crucial for ensuring safety, reliability, and durability. These bolts are subjected to rigorous loads, vibrations, and other stresses during their normal operation. Choosing a higher-grade bolt, therefore, minimizes the possibility of bolts failing and other potential issues arising.
Hence, if an application demands a higher degree of strength and durability, it is advisable to opt for a 12.9 6V0937 segment bolt over a 10.9 bolt.