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  • Bearing Wear
    very slowly. Wear occurs during start-up and slowdown when speed is too low to produce sufficient fluid pressure to support the bearing surfaces on a lubricant film. If hard debris imbeds in a babbitt or plastic bearing and protrudes above the bearing surface, the journal can wear seriously during
  • Bearing Lubrication II
    Most bearings operate with a fluid film -- oil, another liquid, or a gas. By far the largest number of bearings are oil lubricated. The oil film can be maintained through pumping by a pressurization system -- in which case the lubrication is termed hydrostatic. Or it can be maintained
  • Proper Film Thickness key to Bearing Survival
    with a low-viscosity fluid such as water. This is because maximum asperity heights range up to 3 the rms value. Lower values boost wear or can make bearings fail prematurely. As a rule, with oil-film bearings should be at least 10 to 20 the combined surface roughness of the shaft and bearing surfaces
  • Slimmed-Down Magnetic-Bearing Systems Fit More Rotating Machinery Applications
    Smaller, streamlined electronics make lubricant-free, low-friction magnetic bearings feasible for more rotating machines. * Magnetic bearings support rotating shafts in five axes without solid or fluid lubricants. * Advances in electronics allow previously bulky controllers to mount on or near
  • Axial Piston Pump
    GGB Bearing Technology's low-friction, self-lubricating bearings offer a complete solution for the fluid power industry.
  • Understanding the Importance of Transducer Orientation
    When monitoring vibration on large gas or steam turbines and generators with fluid-film bearings, the relative movement of the shaft within the bearing is typically measured by a pair of shaft proximity (eddy current) transducers. Data from these transducers is used to produce a variety of plots
  • Hydraulic fluids change with the times
    through a bearing -- and with it bearing friction and load-carrying capacity. Fluid with the proper viscosity quickly distributes to moving surfaces -- a key to long pump life. Fluid with lower-than-recommended viscosity can cause internal pump leakage and raise
  • Fighting friction with solid-film coatings
    to reduce friction and wear. Fluid lubricants would have to be used in sealed systems that would add weight to the brace. Coating the inside of a journal bearing prevents metal-to-metal contact with the mating shaft. Low-friction coatings are used on bearings for two reasons. The first is as a backup

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