Vibration analysis and ultrasound have complementary strengths that can enhance the effectiveness of each, industries are finding. At GTI Predictive, for example, "while we are using our vibration tools to determine root cause analysis for unbalance, misalignment, bearing defects and looseness, ultrasound is a very good tool for determining when and how much to lubricate," said Paul Berberian, GTI's vice president of predictive technology. "This prevents overlubrication, which is one of the main causes of bearing failure."

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