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Metal-Polymer Bronze Backed PTFE Plain Bearing

GGB Bronzed backed DP4-B special bush with grooves and notches
DP4-B Plain bearing for maintenance-free operations, with bronze backing
GGB DP4-B Maintenance-free flange washer
GGB DP4-B Plain bearing maintenance free bush with groove
Metal-Polymer Bronze Backed PTFE Plain Bearing

Product's benefits

  • Simply Assembly
    Simple assembly
  • Reduced System Cost
    Reduced System Cost
  • Reduce Size and Weight
    Reduce size/weight
  • Quiet Operation
    Quiet Operation
  • Maintenance Free Operation
    Maintenance Free Operation
  • Lubricated Operation
    Lubricated operation
  • Eliminate Corrosion
    Eliminate corrosion
  • Dimensional Stability
    Dimensional Stability



  • Good wear and low friction performance over a wide range of loads, speeds and temperatures in dry running conditions
  • Very good performance in lubricated applications
  • Good performance in greased applications
  • Suitable for linear, oscillating and rotating movements
  • Bronze back offers improved corrosion resistance in humid/saline environments
  • Lead-free material compliant to ELV, WEEE, and RoHS specifications
  • Tested acc. to ASTM E595/ECSS-Q-ST-70-02C - Outgassing properties of materials used in Spacecraft equipment

Bearing forms available in standard dimensions

  • Cylindrical bushes
  • Flanged bushes
  • Sliding plates

Bearing forms made to order: standard forms in special dimensions, thrust washers, flanged thrust washers, half-bearings, special shapes obtained by stamping or deep drawing, bearings with locating notches, lubricant holes and machined/stamped grooves

GGB DP4® & DP4-B - Metal-Polymer - Lead-free Bearing Solutions

Operating performance

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Dry Operation Good
Lubricated Operation Very Good
Greased Operation Good
Machinable Consult with Applications Engineer
RoHS Compliant Compliant
Standard Sizes Not Available
Application Excellence
Very Good
Consult with Applications Engineer
Not compliant


  • Metal-Polymer Composite Material
  • Bronze Back + Porous Bronze Sinter +
  • PTFE + Fillers


Technical specifications

  • General

    Maximum load, p
    - Static 140 20,000 N/mm2 psi
    - Dynamic 140 20,000 N/mm2 psi
    Operating Temperature
    - Min -200 -328 °C °F
    - Max 280 536 °C °F
    Coefficient of Linear Thermal Expansion
    - Parallel to the surface 18 10 10-⁶/K 10-⁶/F
    - Normal to the surface 36 20 10-⁶/K 10-⁶/F
    Maximum sliding speed, U 2.5 500 m/s fpm
    Maximum pU factor 1.0 29,000 N/mm² x m/s psi x fpm
    Coefficient of friction, f 0.04-0.25* 0.04-0.25*
    Oil Lubricated
    Maximum sliding speed, U 5.0 1 000 m/s fpm
    Maximum pU factor 10.0 286 000 N/mm² x m/s psi x fpm
    Coefficient of friction, f 0.02 - 0.08 0.02 - 0.08
    Shaft surface roughness, Ra
    - Dry 0.3 - 0.5 12-20 µm µin
    - Lubricated ≤ 0.05 - 0.4* ≤ 2 - 16* µin µm
    Shaft surface hardness
    - Unhardened acceptable, improved bearing life > 200 > 200 HB HB

* Depending on operating conditions

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