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RST-SF-1 Oilless Bearings


    It’s made of high quality low-carbon steel plate, sintered porous bronze as its interlayer and the compound of PTFE material and Pb as its surface. It can offer the properties of good self-lubricating anti-abrasion, low-friction, fully develop the advantages of metal and multi-element polymer.It's used in steel metallurgical industry, such as those used in roller grooves of successive casting machines, cement grout pump and spiral conveyers for cement etc.


    Material Structure

    1. PTFE/Pb Composition, 0.01-0.03mm, anti-abrasion material, which will form a lubricating film during operation.
    2. Sintered Bronze powder layer, 0.2-0.35mm, which further strengthen the combination of the steel plate and PTFE layer and transfer the heat more quickly.
    3. Low carbon steel backing, bear high load transfer heat.
    4. Copper/Tin plating layer, anti-corrosion.

Max Load Static load 250N/mm2   Friction coefficient 0.03~0.20 
Low-speed Rotation 140N/mm2 max linear velocity dry friction 2m/s 
Rotation、Oscillation 60N/mm2 Hydrodynamic lubrication >2m/s 
Max PV
(Dry Friction)
Short-term operation 3.6N/mm2.m/s Thermal conductivity 42W(m.K)-1 
Continuous operation 1.8N/mm2.m/s Coefficient of thermal expansion 11x10-6/K 
Operation Temp. -195℃~+280℃  



  1. Working under oilless or minim oil state, maintenance free or just need a little maintenance.
  2. Resist Abrasion, low coefficient of friction, long operating life.
  3. Operating in -195℃~+280℃
  4. Good mending, low-noise, non-pollution
  5. Thin wall, light, which can reduce the machine to small
  6. Forming a transferred film during operation to protect the shaft
  7. Low demand to the shaft even no surface hardness treatment, which lower the cost of the mating components
  8. No absorption to water/oil, small coefficient of Thermal emption, good thermal conductivity and size stability
  9. The back of the steel strip can be plated with various metal, anti-corrosion. The products now are used in sliding components of different machines, such as auto machines, piston pump, gear pump, textile machine, auto-sides machine, Injection Machine, sports Machine, office equipment etc.