Belt drives are commonly used to transmit power. They are cheap and easy to maintain. However they are often a source of vibration due to misalignment, belt wear, and belt resonance. Belt misalignment can be identified from frequency spectrum, 1X vibration in both the radial…
read moreMachines are typically balanced in one plane or two planes by adding or removing material. The previous article titled “Balancing in Manufacturing“, mentioned different types of imbalance in rotating machinery, and the importance of why machines have to be balanced. The question is: How do…
read moreWith the advent of better vibration measurement tools at reduced costs, may companies have implemented vibration monitoring programs to protect their machinery and ensure production does not suffer. In the past, it was common to run a machine until failure occurred; the biggest setback with…
read moreThe main cause of vibration in washing machines is an unbalanced load due to unevenly distributed clothes. During the spin cycle, the load is “pinned” on one side of the spin basket due to centrifugal force. This can make the machine “walk”, causing damage to…
read morePower tools have been known to induce the risk of vibration-related diseases. An acute disease that is caused by regular exposure to hand-arm vibration (HAV) is known as white finger or Raynaud’s disease. There are also other vibration-related diseases such as: permanent and painful numbness…
read moreImbalance in Rotating Machinery Examples of mass imbalance: unbalanced propeller and uneven distribution of electrical winding The word imbalance, unbalanced, and unbalanced mass are interchangeable. Vibration in rotating machinery is commonly caused by imbalance. Imbalance is a condition where a shaft’s rotational axis and weight…
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