Maximizing Carcass Life
To ensure the longevity of conveyor belts, it is crucial to shield the carcass from load abrasion and other factors that could cause deterioration. The top and bottom covers of the conveyor belt themselves contribute little, if any, structural strength. The main function of the top cover is to protect the carcass from impact damage and wear, while the bottom cover serves as a friction surface for driving and tracking the belt. Typically, the top cover is thicker and more resistant to abrasion, impact damage, and wear compared to the bottom cover.
In severe conditions, a top cover as thick as 18 millimeters (0.75 in.) or more may be necessary. The primary goal in selecting covers is to ensure they are thick enough to safeguard the carcass throughout its operational life.
Covers are crafted from various elastomers, including natural and synthetic rubbers, PVC, and materials tailored to meet specific needs such as oil, fire, or abrasion resistance.
Turning a belt over when the carrying side wears down may seem like a solution, but it is generally advised against, especially after significant wear on the top side. Reversing the belt introduces an uneven surface to the pulley, leading to poor tension distribution and potential belt wandering. Additionally, any cargo fines embedded in the worn surface can now cause abrasive wear on pulley lagging, idlers, and other support systems. Over time, belts develop a set due to years of troughing in one direction, making it challenging to reverse the trough direction needed for inversion. This adjustment can take weeks and often results in belt-tracking issues. 
It's important to note that some belt manufacturers stamp their logos into the carrying surface. Even when positioned near the belt edge, these recessed areas can trap conveyed material, potentially compromising belt-cleaning and sealing mechanisms. To mitigate this, it is recommended that users request these logos be placed on the return, non-carrying side of the belt.