Which type of grease is typically necessary for high-load applications in bearings?

High-load grease is specifically formulated to withstand the demands placed on bearings in high-load applications. These applications often involve significant pressure and friction, which can cause wear and overheating if not properly lubricated. High-load grease contains additives that enhance its performance under these conditions, such as extreme pressure (EP) additives that help protect metal surfaces from welding together under heavy loads. This type of grease also tends to have a thicker consistency, which allows it to stay in place and provide sustained lubrication even when subjected to heavy stress.

In contrast, general purpose grease may not offer the necessary resistance to the extreme conditions found in high-load settings. Water-soluble grease is designed for different applications, typically where ease of cleanup is required, rather than for high-load scenarios. Light grease, being less viscous, may not provide adequate protection under heavy stresses, leading to potential failure of the bearings. Therefore, high-load grease is the most suitable option for ensuring optimal performance and longevity of bearings in demanding environments.