# Articles

## Ultrasound Worth It’s Weight in Gold

By Jim Hall and Roger Collard

Recently, I traveled to Lihir Gold PNG, Ltd. (now Newcrest Gold), a mining operation on Lihir Island,to deliver my Ultrasound for Predictive Maintenance Level I Certification Class.

## Understanding & Comparing Risk

By Brian Y. Webster

In the Oct/Nov11 edition of Uptime (Risk & Criticality), a concept of risk was introduced that utilized a Euclidean distance of probability and consequence, mathematically written as

Risk2 = Probability2 + Consequence2

The author claimed that "this [method] provides for accurate comparison of relative risk."1 The purpose of this article is to explain the conflict between traditional risk calculation methods and distance methods, as well as the potential poor business decision that could result from using distance methods. For the purpose of this article, the Euclidean distance for assessing risk as described in the original article will be called the "positional risk."

## Understanding and Implementing Predictive Maintenance Excellence

By Kenneth D. Peoples Lubrication Champion / Maintenance Manager IDS-Boeing Wichita Wichita, Kansas Shared Services Group /Site Services

Implementing a PdM program can be tough in today's world of corporate business thinking. In order to pursue an effective program you will need to have a basic plan with real world goals and objectives. This overview will show the very basics of implementing a program strategy that will lead to success. The examples will be real and the results will be real as well. Understanding where to start and where to focus in the future is critical. This paper and presentation will give some insight to starting up and sustaining an effective program.

## Understanding Bearing Housing Protection and Reliable Lubricant Application

by Heinz Bloch

by Heinz P. Bloch, P.E.and Chris Rehmann

Bearings are precision components; they require clean lubricants in adequate amounts to survive, and even seemingly small amounts of contamination can greatly reduce equipment reliability and uptime. A new generation of bearing protectors is now available that can help maintain lubricant cleanliness, prevent loss of lubricants, and prolong the life of your rotating equipment.

## Understanding Infrared (IR) Windows and their Effects on IR Readings

By Tony Holliday

This article explains the factors affecting transmission through an infrared (IR) window (as used in a practical electrical inspection application). Learn how different IR window types affect your readings and how to correct for transmission losses.

## Understanding Lubrication Failures

Fail·ure 1 a: An omission of occurrence or performance: A failing to perform a duty or expected action b: A state of inability to perform a normal function

As a consultant in the field of lubrication, I've had discussions with hundreds if not thousands of maintenance professionals about the type and frequencies of the lubrication-related failures they experience. A disturbingly large percentage of the time I am told that they don't really experience many lubrication-related failures. This response always prompts another question: What is a lubrication-related failure? To those who think they have none or few, a lubrication-related failure is usually defined as one that occurs when a machine has no oil in it or someone puts the wrong oil in it. I would suggest that most manufacturers experience many lubrication-related failures and merely misclassify them. In fact, many failures are not even recorded as such because the problems were diagnosed and repaired before the machine ceased to function. In my opinion, any time a machine or component does not achieve maximum service life, a failure has occurred.

## Understanding the basics of balancing and measuring Techniques

By Gary K. Grim, Bruce J. Mitchell

Why Balance? All rotating components experience significant quality and performance improvements if balanced. Balancing is the process of minimizing vibration, noise and bearing wear of rotating bodies. It is accomplished by reducing the centrifugal forces by aligning the principal inertia axis with the geometric axis of rotation through the adding or removing of material. In order to understand the basics of balancing it is necessary to define the following fundamental terms.

## Understanding the Limitations of Oil Analysis

Brian Thorpe

It is very important to understand the limitations of test procedures used in oil analysis. If you have been in the business for awhile, you know dark oils can cause problems with laser particle counters.

## Understanding the Rate of Change Dangers with Alarms

By Matt Spurlock and Jeff Keen

With alarms being a primary tool in today's predictive maintenance programs, it is becoming increasingly important to fully understand the concepts around setting alarm levels. With oil analysis, we are looking at three primary categories: machine health, lubricant health and system contamination. For the purpose of this article, we will focus on those alarms related to machine health, with follow-up articles focusing on the remaining types of alarms.

## Understanding the Reality of Filter Element Ratings

by Mike Boyd

Our company was the first in our industry to utilize hydraulics to any significant degree. We used hydraulics for propulsion, for auxiliary functions and for steering. With the implementation of an innovative technology, we had to learn all about it. Wally was sent to the training schools of each of our component suppliers. He returned our company expert.

## Understanding Why Structural Parts Crack

by Ralph Buscarello

In the April/May 2012 issue of Uptime® magazine, an excellent article showed the different types of cracks that form in places due to what most engineering articles refer to as metal fatigue. The following article is written by a vibration specialist who claims there is no such thing as metal fatigue, but instead cracks form due to reversible stresses, reversing from tension to compression and back again, at the node of a resonant part.

## Up, Up and Away

#### Taking Off with Aerial Infrared Surveys

by Gregory R. Stockton

The imagery (IR) from aerial infrared thermal surveys of facilities, complexes, campuses, military bases and cities can be used for many purposes.  Systems like supply steam and condensate return lines, hot water lines, chilled water lines, supply water mains, distribution piping, storm water drains and sewer lines can be monitored by looking at surface temperatures/patterns.

## Uptime Magazine - April/May 2012 Index

Article Index for Uptime Magazine April/May 2012 Articles on Reliabilityweb.com

## Using Cause & Effect Diagrams for Proactive Effect - Turn It Around with Maintenance Planning

By Jeff Shiver

In Root Cause Analysis, one of the tools frequently utilized is the Cause and Effect Diagram to show how specific actions combine to define a particular result. Typically, the categories of Man, Materials, Methods, and Machine are illustrated in the diagram below. As opposed to using it as a reactive tool after the fact, we can turn it around for purposes such as diagramming effective maintenance planning in a proactive manner. To accomplish this approach, we can provide specific actions in each of the categories above to realize the desired outcome.

Page 50 of 55 pages « First  <  48 49 50 51 52 >  Last »