Arc-tooth connecting links and serrated connecting links are two different types of mining connecting links, with significant differences in structural design, performance characteristics, and application scenarios.

1. Differences in Structural Design

Serratted Connecting Link:

- The serrated connecting link consists of two elastic pins fixing and connecting two serrated half-rings.

- The tooth shape of the serrated ring resembles the teeth of a saw blade. This design provides the serrated ring with high locking force and stability during engagement.

- Each side of the serrated ring has 5 connecting teeth, allowing each tooth to evenly share the load. The precise matching of the tooth's load-bearing capacity and tooth spacing is a key factor ensuring the stable operation of the serrated ring under high loads.

Arc-tooth Connecting Link:

- The tooth surface of the arc-tooth connecting link is changed from the flat tooth surface of the serrated connecting link to an arc-shaped tooth surface, increasing the mutual contact area of each tooth surface of the connecting link.

- The upper tooth root and tooth tip, as well as the transition surface of the arc-tooth connecting link, are convex, while the lower part is concave, with the same arc curvature.

- The arc-tooth connecting link engages with the chain links of the chain through its special arc-shaped teeth, reducing stress concentration and thereby improving the fatigue life and reliability of the connecting link.

2. Differences in Performance Characteristics

Serratted Connecting Link:

- The breaking load of the serrated connecting link reaches 1450 kN, with a fatigue life of nearly 40,000 cycles.

- The teeth of the serrated ring are relatively small. Despite the existence of tooth spacing tolerances, the design of the serrated ring aims to achieve as uniform a load distribution as possible. This uniform distribution helps extend the service life of the serrated ring and ensures reliability under various working conditions.

Arc-tooth Connecting Link:

- Some models of arc-tooth connecting links can achieve a breaking strength of 2350 kN and a fatigue life of 50,000 cycles, with some even reaching 70,000 cycles.

- The arc-tooth connecting link has high breaking strength and fatigue strength.

- The arc-tooth connecting link has undergone reasonable structural improvements. Due to its unique tooth design, the arc-tooth ring can provide high-strength connections, making it suitable for applications that bear larger loads.

In summary, the main differences between arc-tooth connecting links and serrated connecting links lie in their tooth design, structural strength, and fatigue life. With its improved structural design and higher performance parameters, the arc-tooth connecting link is more widely used in industries such as coal mining.