Advantages of Hydrodynamic Bearings:
• Indefinitely long life with full film lubrication.
• High load capacity
• Load capacity and stiffness increase with speed.
• Extreme overload capacity for shock loading.
• High vibration dampening.
• Replacement involves only limited disassembly.

Roller Bearing Weaknesses:
• Will compress five times more than hydrodynamic gibs when subjected to a high dynamic load.
• Shock load capacity no greater than static load capacity.
• Statistically predictable limited life.
• Severe overloads may produce brinelling.
• Replacement may involve extreme disassembly.