Fixed Geometry Bearings / Sleeve Bearings

Using Miba Fixed Geometry Bearings (or Sleeve Bearings) is an economical way to achieve good rotordynamic performance.  Miba bearings are characterized by their precise bore tolerances and are highly customizable so you can dial in the stiffness and damping coefficients to optimize your machine performance.  Some of the many bore configurations possible are: cylindrical, offset half, lemon bore, 3-lobe, 4-lobe or directed lube and can be provided with fixed flat land, taper land, compound taper land or tilting pad thrust options.

 

Applications

  • Blowers
  • Gearboxes
  • Large electric motors
  • Pumps
  • Refrigeration Compressors
  • Steam & Gas Turbines
  • Turbochargers

Sizes

  • Up to ID 825 mm (32") 
  • Contact us for larger sizes

Materials

  • Steel/Babbitt
  • Steel/Bronze
  • Bronze
  • CuCr/Babbitt
  • PEEK
  • Aluminum
  • Alternate materials available

Bore Design

Depending on the application the journal bearing has a cylindrical bore, offset halves, lemon bore, 3-lobe or 4-lobe bore. Each design has different benefits and characteristics. Our engineers will help you to find the best solution.

Benefits of Fixed Geometry Bearings
No metal to metal contact between shaft and bearing while the machine is operating. Dampened, low-oscillation, noise and wear-free shaft operation. If the oil supply is operating properly, in theory unlimited bearing service life is given.
 

    Bore Peripheral speed* Surface pressure*    
    Cylindrical 0 - 35 m/s (0 - 115 ft/s) 0,2 - 5 mPa (30-700 psi)    
    Lemon Bore 25 - 80 m/s (80 - 260 ft/s) 0,2 - 4 mPa (30 - 600 psi)    
    3 - Lobe 30 - 100 m/s (100 - 330 ft/s) 0,1 - 3,5 mPa (20 - 500 psi)    
    Offset Halves 20 - 100 m/s (70 - 330 ft/s) 0,2 - 4 mPa (30 - 600 psi)    
    4 - Lobe 30 - 100 m/s (100 - 330 ft/s) 0,1 - 2,5 mPa (20 - 350 psi)    

 

*empirical values. Final design depends on application. Contact Miba for consultation.

 

 

Features

Fixed Geometry Bearing

Fixed Geometry Bearing / Sleeve Bearing
more

Advantages of Miba Industrial Bearings

  • 100+ Years of fluid film bearing experience
  • High level responsiveness
  • Experts in engineering and improvement of hydrodynamic bearing system
  • Calculation and design package from one source
  • Trusted Miba Quality (tight tolerances and high production quality)
  • Reliable service of babbitted bearings & trouble shooting

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