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BK 090

Sliding bush BK090


  • multi-lubrication friction bearing in rolled bronze 
Construction type
  • the bushes are suitable for rotational and oscillating movements 
  • for grease lubrication: 2.8 N/mm² x m/s 
  • for oil lubrication: 10 N/mm² x m/s 
Permissible load
  • static: 140 N/mm² 
  • rotation, oscillation: 70 N/mm² 
Sliding speed max.
  • 1 m/s
Friction coefficient
  • lubricated: 0.05 to 0.15 
Thermal expansion coefficient
  • 11 x 10-6 K-1 
Coefficient of thermal conductivity
  • 60 W/(m·K)
Temp. min.
  • -50 °C
Temp. max.
  • 150 °C
Surface pressure
  • 140 (≤ N/mm²) 
  • CuSn8 bronze 
  • hydraulic systems 
  • ISO 3547 
  • DIN 1494 
All characteristics

Product description

An initial lubrication with grease is recommended and continual lubrication significantly increases the service life of the friction bearing.
Peak to valley height of shaft to be observed Ra <; 0.8 μm.
Hardness of shaft to be observed 150 <; HB <; 600.
Maintenance-free operation.
Not suitable for dirty conditions.
Shock and vibration resistant.
High permitted load.
Good friction characteristics.
No water absorption.
low play during operation.
Extremely space-saving.

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