OILITE BRONZE-GRAPHITE SINTERED BEARINGS



Technical Details

Technology

Advantages

Applications

Technical Details:


Chemical composition

Cu-Sn

Cu-Sn-C

Cu-Sn-Fe-C
Apparent density (g/cm3)

5.8-6.0

6.0-6.2

6.2-6.4

6.4-6.8

6.8-7.1
Admissible charge  “p*v” [daN/cm2 * m/s] Max. 20
Functioning temperature range [0C]
                    - oil impregnated:   
- 40 +80
                    - sel-flubricant without oil:
- 60 +250
Revolution speed regime 50-30000 rot/min
External diameter [mm] 8 – 100
Height/Diameter  ratio max 2
Cross-section surface

max 30 cm2


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Technology:

 

Sintering – the technology we use to produce oilite bronze-graphite bearings - is the method of making objects/components by heating (bellow the melting point) and pressing the metallic powders until particles adhere to each other.

Sintered bronze is particularly suited for producing bearings since its porosity facilitates the flowing of lubricants through their structure.Thus, due to their special composition the bronze-graphite sintered bearings have the self-lubrication property (oil impregnation in standstill, oil film during rotation, oil re-absorption after stop)

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Advantages:

    - no need to use the classic lubrication methods;
   
    - the friction coefficient is strongly reduced;

    - sizing phenomena are eliminated;

    - noiseless functioning;

    - low maintenance costs;

    - manufacturing by precise cutting while maintaining the self-lubrication features;

    - tight dimensional tolerances;

    - lower prices comparing with the machined and cast bearings;

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Applications:

 

Oilite sintered bearings have an extended range of applications but are particularly designed to function in special conditions as the following:

            - extreme (low/high) temperature regimes;

            - high revolution speed;

            - corrosive environment.


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