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  • Bearing Closures - Bearing Seals and Bearing Shields
    Ball and roller bearings are available with different types of shields and seals. These are commonly referred to as closures. Closures can extend bearing life by preventing contaminants from reaching the critical surfaces inside the bearing, and they help retain the lubricant in the bearing
  • Selecting a bearing
    Ball bearing part number selection can only be properly performed with a working knowledge of ball bearing performance expectations and requirements. Size, application, construction and operating conditions need to be taken into account before engaging in the ball bearing selection process
  • Bearing Mounting
    For instrument bearings, certain special considerations should be emphasized: Accurate axial positioning of the shaft relative to the housing requires shoulders, snap rings, or bearing flanges. Diameter of a shaft or housing shoulder must be sufficient to ensure solid seating and support
  • Bearing Wear
    PV (Pressure & Velocity) is the most common empirical tool to use when comparing and contrasting bearing. performance. "P" is related to pressure or pounds per square inch on the projected bearing area, while "V" is. velocity in feet per minute of the wear surface. Knowing the PV limit of a bearing
  • Bearing Lubrication
    as such for convenience. Principal advantages are excellent viscosity-temperature characteristics, good resistance to oxidation, and wide operating-temperature range. Standard method for applying oil lubrication is to dip the bearing in the oil, remove, and centrifuge excess oil from the bearing. For extremely
  • Bearing Loads
    In some applications, allowable load seriously influences selection. Major variables affecting load capacity are ball size and number and internal geometry of the bearing. Primary consideration is given to static ratings. A bearing may be deformed permanently by high loads on nonrotating bearings
  • Bearing Wear
    Wear of plain bearings is influenced by the state of lubrication and, conversely, wear characteristics influence the various lubrication states. Hydrostatic bearings do not wear when operating properly because the bearing surfaces are separated by a film of oil. Erosion of flow restrictors
  • Bearing Materials
    Bearings materials are classified as through-hardened materials (used largely for ball bearings) and case-hardened materials (used largely for roller bearings). Critical applications require vacuum-processed steels. Regardless of material type, a commonly accepted minimum hardness for bearing
  • The Bonded-On Bearing
    They are good enough for NASCAR engines. Bonded bearing surfaces are coatings made from high-performance polymers reinforced with hard nanosized particles. Edited by Jean M. Hoffman Most engineers would jump at the chance to replace bearing inserts with dry lubricants. In many cases, of course

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