• The trend of installing wind turbines that are larger and more powerful continues, the size and power production of turbines increase as do main shaft bearing performance challenges
• Turbines blades increasing in length generate more loads than ever on the main shaft bearings, making the proper design and selection of these bearings even more critical
• Historical look at all the main shaft bearing configurations currently in use today for both direct drive and gearbox driven turbines
• What are the best concepts for bearing design, advantages and disadvantages of each
• Widespread two single row tapered roller bearing mounting and the rationale behind that design configuration for larger turbines