Lubrication used on the bearings of line shaft turbines can be _____

• A. Oil
• B. Grease
• C. Water
• D. Oil Or Water

Answer: (D)

Lubrication for line shaft turbine bearings is about creating a protective film between moving parts to reduce wear, carry away heat, and keep contaminants out. In many turbines, oil is circulated under pressure to form that hydrodynamic film, providing reliable lubrication, cooling, and corrosion protection in high-speed, high-load conditions. In other systems—particularly some hydroelectric units—water itself can serve as the lubricant, with a controlled flow that cools and lubricates the bearings while avoiding oil discharge into the water supply and reducing maintenance concerns. Grease isn’t suitable for the main line shaft bearings because it can’t reliably handle the high speeds and heat over long periods. So, depending on the plant design and operating requirements, lubrication can be oil or water.