Designed to alter the direction of the lifting rope and to enhance mechanical efficiency. Typically comprising one or more rotating wheels securely mounted on a hook, bracket, or truss, these sheaves facilitate the smooth movement of the lifting cable as it wraps around their circumference. This rotational action not only changes the path of the load but also provides a mechanical advantage that minimizes the force required to lift heavy objects. When designing and installing crane sheaves, careful attention must be given to factors such as the wheel profile, material quality, and mounting stability to ensure reliable and safe operation under varying load conditions.