A shaft centerline diagram is a plot used in the vibration analysis of journal bearings. It is also called a shaft average centerline diagram. The purpose of this graph is to display the average position of the rotor in the bearing. In short, for different bearing types, there is an expected or “normal” position of the shaft in the bearing. If this position changes, it can indicate a problem.

Condition-based maintenance (CBM) is a maintenance strategy that focuses on monitoring the condition of equipment to determine when maintenance actions should be performed. While CBM can be effective in reducing unplanned downtime and optimizing maintenance activities, it alone does not address the root causes of failure and may not lead to long-term improvements in machine reliability. Here are a few reasons why CBM, on its own, may not improve reliability.

In a recent article I talked about linear and nonlinear systems and how the output of these systems contain frequencies, such as harmonics and sidebands, that are not in the inputs. In this article I want to share a short video I made with my signal processing simulator that demonstrates the concepts. You will want to watch the video with the sound on.

In an era characterized by rapid technological advancements and burgeoning data, industries are constantly seeking methods to enhance efficiency, minimize downtime, and optimize asset utilization. One such method that has emerged at the forefront is Condition Based Maintenance (CBM); a sophisticated, data-driven approach to asset maintenance.

Why do components fail? – This article explains common failure mechanisms, component types to which each applies, and suggests non-intrusive monitoring techniques to discover components in various stages of progressive failure. 

Costly oversights occur repeatedly despite thoughtful planning dedicated to maximizing the operation and lifespan of the motor. One unsettling realization is that testing, considered part and parcel of preventive maintenance, is not preventing anything because there is nothing to indicate that analyzing the data was even considered. This is a major pitfall and a classic example of a gap in a company’s motor management program.

Using the same concept of a trifecta (three factors for success), this article provides companies with the winning strategies of motor maintenance, focusing on the three reliability tasks for electric motor testing and the order in which they should be applied. Following these steps will drastically improve their odds in motor reliability and put a big payday at the end of their production goals.

Condition Monitoring when used to drive reliability improvement offers diagnostics, information and data for Root Cause Analysis and equipment redesign, along with verification of defect or design correction. Condition monitoring applied proactively is a context embracing world class reliability maintenance concepts.