602502602 Roller Assembly with Grease Seals

After how many drum rotations should this replacement last until a replacement is neededt?

The frequency of replacing drum rollers on a concrete mixer depends on various factors such as the type and quality of the drum rollers, the intensity and frequency of usage, the condition of the mixer, and the maintenance practices applied. There isn't a fixed number of drum rolls that dictates when drum rollers need replacement. Instead, it's essential to monitor the condition of the drum rollers regularly and replace them as necessary based on wear, damage, and manufacturer recommendations to ensure the continued efficient operation of the concrete mixer.