Poly-Texx® P25

Poly-Texx® P25 is a proprietary filled PTFE composite bearing material.  It is self-lubricating and has very low friction.  Common appolications include thrust washers, bearings and bushings on industrial machinery and conveying systems. The filler can be abrasive to soft mating surfaces/shafting, therefore it is recommended that they should be at 32 Rockwell or harder.   The combination of excellent bearing properties, self-lubrication and compression strength makes Poly-Texx® P25 a great choice for many demanding bearing applications.

Poly-Texx® P25 is off white in color and is available in sheet, rod and tubing.  It is easily machined with conventional metal working equipment.  Long running jobs should utilize carbide tooling to extend tool life. Close tolerances can be achieved to +/-.001″ with experience.

Specification Test Value Units
Specific Gravity, 73°F D792  2.04
Tensile Strength @ Yield, 73°F D638 psi
Tensile Modulus of Elasticity, 73°F D638 psi
Tensile Elongation (at break), 73°F D638 %
Flexural Strength, 73°F D790  1.9 psi
Flexural Modulus of Elasticity D790 psi
Shear Strength, 73°F D732      – psi
Compressive Strength – Ultimate  1,000 psi
Compressive Strength at 2% Deformation D695  1,000 psi
Compressive Strength at 10% Deformation D695 psi
Deformation Under Load 2 %
Compressive Modulus of Elasticity, 73°F D695
Compressive Strength ⊥ to Laminate (Modulus)     1,000 psi
Compressive Strength ⊥ to Laminate (Yield)     1,000 psi
Compressive Strength ⊥ to Laminate (Ultimate)     1,000 psi
Hardness, Durometer (Shore “D” scale) D2240  62-63
Hardness, Rockwell (Scale as noted) D785 Rockwell M
Izod Impact, Notched @ 73°F D256 Type A ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007  0.2
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007  0.12
Maximum Static Bearing Load (P) PTM55007  1,000 psi
Maximum Unlubricated No Load Bearing Velocity (V) PTM55007  400 ft/minute
Maximum Limiting PV (Unlubricated) PTM55007  10,000 psi x ft/min.
Wear Factor “K” x 10-10 PTM55010  6 Cubic in.-min/ft.lbs.hr
Sand Wheel Wear/Abrasion Test  60 UHMW=100
Minimum Mating Surface Hardness Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA)  5.5 in/in/°F x 10-5
Coefficient of Thermal Expansion (Bearing Diameter) E-831(TMA)  5.5 in/in/°F x 10-5
Coefficient of Thermal Expansion (Bearing Length E-831(TMA)  6.2 in/in/°F x 10-5
Softening Point °F
Heat Deflection Temperature 264 psi D648 °F
Embrittlement Temperature  cryogenic °F Min.
Continuous Service Temperature in Air  550 °F Max.
Short Term Service Temperature  550 °F Max.
Tg-Glass Transition (Amorphous) D3418  636 °F
Melting Point (Crystalline) Peak D3418  N/A °F
Thermal Conductivity F433 BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149      – Volts/mil
Volume Resistivity D257 ohm/cm
Surface Resistivity D257 ohm/cm
Dielectric Constant, 106 Hz D150
Dissipation Factor, 106 Hz D150
Flammability @ 3.1mm(1/8 in.) UL94 UL94  V-0
Arc Resistance seconds
Water Absorption, Immersion 24 Hours D570 (2)  Nil %
Water Absorption, Immersion Saturation D570 (2)  Nil %
Machinability Rating  2 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf)  .50-3.0 inches
Sheet Thickness Availability (Off the Shelf)  .020-6.0 inches
Characteristics / Attributes  High PV/ Low Friciton/ Self Lubricating