MR-5 ALC Self-Lubricated Bearings

MR-5 ALC Technymon self-lubricated flange bearing

MR-5 ALC bearings made with an innovative composite material. This material consists of a special tape made from compounded PTFE wrapped around alluminium cladded steel supporting shell. The PTFE tape made from carbon and graphite, which give the bearings these properties: self-lubrication, noise isolation, and minimal play.

The MR-5 ALC bearings come in two key versions:

  • Version E: with a high surface conductivity PTFE sliding layer
  • Version D: with a non-conductive PTFE sliding layer

MR-5 ALC bearings are characterized by the use of aluminium cladded steel as the supporting shell.

MR-5 ALC bearings come in various forms, including: Cylindrical bearings; Flanged bearings; Washers; Belts; Cast-to-size parts.

These bearings are available in standard thicknesses of 0.500 mm, 0.750 mm, and 1.000 mm.

Operating Conditions

  • dry condition icon
    DRY Very Good
  • dry condition icon
    OIL Good
  • dry condition icon
    GREASE Good
  • dry condition icon
    WATER Fair
  • dry condition icon

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composite layers of MR-5 ALC bearing preview
composite layers of MR-5 ALC bearing

Structure of the composite material

Layer Average analyses of the material Thickness of layer
Sliding layer PTFE Modified 0,150 ÷ 0,170 mm
Supporting shell Aluminium cladded steel 0,250 ÷ 0,750 mm (Depending on final thickness required)
Protective layer Sn or Zn (as per customer requirement) > 1 μm


  • Thick sliding layer with uniformly distributed solid lubricants
  • Good calibration/sizing assembly (zero-clearance)
  • High surface conductivity with E version PTFE, not-conductive D version PTFE available with notches/dimples, to prevent paint bridge issues, 1Ω volume conductance can be achieved with proper surface contact
  • With right fit, uniform torque can be achieved at the required value
  • Thick PTFE layer helps in edge loading

Technical Data

Maximum Specific Load Static 60-200 N/mm2 (8700-29000 psi)
Maximum Specific Load Dynamic 45-120 N/mm2 (6540-17400 psi)
Service Temperature Minimum -200°C (-328°F)
Service Temperature Maximum +180°C (+356°F)
Service Temperature Intermittent +260°C (+500°F)
Maximum Speed Dry 1.5 m/s (300 fpm)
Coefficient of Friction Dry 0.06 - 0.3
Maximum Dry Load Factor Continuous 1.8 N/mm2 · m/s
Surface Resistivity E version PTFE ~105Ω
Surface Resistivity D version PTFE ~1014Ω

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