Predictive Maintenance
recognizes that all parts have a lifetime and seeks to replace wearing parts before the calculated date of failure. A good preventative maintenance program will increase the life span of parts, but eventually equipment owners must still replace wearing items.

There are several ways for you to determine the best time to replace bearings, gearboxes, and other mechanical parts on your equipment. Unfortunately if you wait for you equipment's performance to dictate when to replace a wearing item it can cost you more money because of

  • damage done to surrounding parts
  • necessary work and rework of parts to bring them up to quality standards
  • unplanned equipment downtime
    You can probably add more ways wearing parts increase your operating costs to that list. There are more effective ways to determine when to schedule replacement of parts. Consider using one, a combination of, or all of these methods
    1. Manufacturer's Recommendation. There is a disadvantage of relying on this method alone. Have you ever had a bearing with a life expectancy of 500 hours still operating after 5000 hours? Recommendations by the manufacturer are determined in harsh environments under loads near the bearings rated threshold. Equipment manufacturer's avoid using bearings that operate too close to the bearing manufacturer's load ratings. For this reason, your bearings will probably last longer then expected. Knowing the manufacturer's recommendations are a great place to start though.
    2. Breakdown History of Machine. This is a great method to employ if you have owned your equipment for several years and have kept excellent records. The environment and loads you are placing your equipment under are probably consistent. If your equipment is newer though you will not want to wait for a history to develop. It is to expensive and stressful!
    3. Inspection. Inspection is another great way to determine part replacement frequency. There are telltale signs of wearing parts. Scoring, flaking metal / chrome, and rounded edges. All of these point to worn parts that will eventually affect your machines performance and shut you down abruptly. Comprehensive Maintenance Solutions is and excellent choice to inspect and maintain your equipment. Our training and experience guarantees that these signs will not be overlooked.
    4. Analyzing with Ultrasonic's, Vibration, and Heat. A technician using any or all these methods will locate bearing and gearbox problems before a technician not using them. Of the three methods NASA has determined Ultrasonic to be the most effective. Therefore we have purchased and use an Ultrasonic Detection Unit in our Predictive, Preventative, and Repair Services. Our ultrasonic unit detects noises at a frequency of 42khz. Humans can hear at a level of 22khz. 42khz is the optimal level for detecting wear in bearings and gearboxes. We measure and record the decibel levels. A change of 50 decibels from the original reading is an indication that the bearing is entering the beginning stage of failure. Now is the best time to change bearings before they fail and damage other parts of your machine.