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  • Bearings take the heat
    Graphite-metal bearings can handle harsh environments that toast liquid-lubricated types. Graphalloy bearings and bushings are available as flanged bushings, thrust washers, and pillow blocks in bores to 20 in. Compression strength ranges from 15,000 to 25,000 psi, depending on grade. The bearings
  • Plane Bearings That Grease Themselves
    bearing. However, nonmetallic bearings need some special design attention. All bearings are rated for maximum loads or pressures ( ), expressed as psi, maximum speeds ( )
  • Bearings That Lube for Less
    bearings will operate in the real world. At the design phase, the engineer is relying on the strength and oil capacity of the bearing to meet, if not exceed, the design requirements. Any bearing selection process should first evaluate the maximum pressure (P) in psi exerted on the bearing
  • Know your thrust bearings
    loads. Unit loading on such bearings is usually limited to about 0.5 to 0.75 x external pump feed pressure of up to about 5,000 psi. The other five thrust bearing types internally generate oil pressure (self-acting) to support thrust loads. Here, a rotating face or shaft collar pumps oil onto
  • Ceramic Bearings Save Energy, Extend Life
    exceeding 1,000,000 psi. This causes cold welding between the ball and the race. Although system inertia easily breaks the weld, the formation and rupture of the weld generates heat. If this condition continually repeats, the fluid lubricant heats up and fails, eventually leading to the failure
  • Profiled Leading Edge Groove Tilting Pad Journal Bearing for Light Load Operation (.pdf)
    in diameter tilting pad journal bearings. This configuration yielded a design with projected bearing loads of less than 25 psi, and journal surface speeds that could approach 400 ft/sec.
  • Optimization of a Leading Edge Groove Tilting Pad Journal Bearing for Application in a Small, High Speed Multi-Stage Steam Turbine (.pdf)
    in. diameter tilting pod journal bearings. This configuration yielded a design with projected bearing loads of less than 25 psi, and journal surface speeds that could approach 400 ft./sec. Under these conditions, the applicable limits of conventional style tilting pad journal bearings are stretched
  • Scanning for Ideas: A Motor Pump Built for Solar Power
    voltage-current curve to get maximum performance. This coincides with the point at which the pump generates maximum rpm and, therefore, maximum performance. The electronically controlled motor operates on 8 to 24 Vdc. The pump can generate up to 250 psi with a brass housing, or 50 psi with the plastic
  • Good Vibrations
    , and a series of tiny holes, or capillaries, restrict the flow of air to the bearing surface. Our ET-2 tonearm has a hard-coat anodized-aluminum spindle that floats inside the manifold on a thin layer of air. A small diaphragm air pump consumes about 15 W and delivers 3.5 psi with 120 in.3/min of airflow
  • Ferrous P/M
    parts from just about any metal, the most commonly used metals are the iron-based alloys. Low-density iron P/M parts (5.6 to 6.0 gm/cm >=), with a typical tensile strength of 16,000 psi, are usually used in bearing applications. Copper is commonly added to improve both strength and bearing properties

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