Poly-Texx LR166 is a filled PTFE (polytetrafluoroethylene) products. It is a maroon in colored, self-lubricating bearing material best known for its versatile design properties for use as electrical insulators and self-lubricating plane bearings in chemically aggressive applications. It can be used at temperatures up to 550 degrees F. Available in rod stock, tubing, sheet and thin film stock. It is also available with ready to bond surface treatment upon request. Sleeve bearings, flanged bearings, and slide plate applications, Poly-Texx LR166 is compatible with most hardened steel shafting and/or mating surfaces. Mild steel is acceptable although harder surfaces are better. Poly-Texx LR166 is virtually chemically inert, making it an excellent choice for bearing and wear components in chemically aggressive environments.

Specification Test Value Units
Specific Gravity, 73°F D792 2.24-2.28 -
Tensile Strength @ Yield, 73°F D638  2,300 psi
Tensile Modulus of Elasticity, 73°F D638  200,000 psi
Tensile Elongation (at break), 73°F D638  190 %
Flexural Strength, 73°F D790  700 psi
Flexural Modulus of Elasticity D790  110,000 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     %
Compressive Modulus of Elasticity, 73°F D695    
Compressive Strength ⊥ to Laminate (Modulus)     psi
Compressive Strength ⊥ to Laminate (Yield)     psi
Compressive Strength ⊥ to Laminate (Ultimate)     psi
Hardness, Durometer (Shore "D" scale) D2240  64-66  
Hardness, Rockwell (Scale as noted) D785   Rockwell M
Izod Impact, Notched @ 73°F D256 Type A  6.0 ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007  0.15  
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007  0.10  
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   Cubic in.-min/ft.lbs.hr
Sand Wheel Wear/Abrasion Test     UHMW=100
Minimum Mating Surface Hardness    C-35 (327) Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA)  5.7 in/in/°F x 10-5
Coefficient of Thermal Expansion // to Laminates E-831(TMA)   in/in/°F x 10-5
Coefficient of Thermal Expansion I to Laminates E-831(TMA)   in/in/°F x 10-5
Softening Point     °F
Heat Deflection Temperature 264 psi D648  240 °F
Embrittlement Temperature    -400 °F Min.
Continuous Service Temperature in Air    550 °F Max.
Short Term Service Temperature   550 °F Max.
Tg-Glass Transition (Amorphous) D3418   °F
Melting Point (Crystaline Peak) D3418   °F
Thermal Conductivity F433   BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149  400 Volts/mil
Volume Resistivity D257  1x1015 ohm/cm
Surface Resistivity D257  2x1013 ohm/cm
Dielectric Constant, 106 Hz D150  2.5  
Dissipation Factor, 106 Hz D150  0.003  
Flammability @ 3.1mm(1/8 in.) UL94 UL94  V-0  
Arc Resistance    180 to 240 seconds
Water Absorption, Immersion 24 Hours D570 (2) Nil %
Water Absorption, Immersion Saturation D570 (2)  Nil %
Machinability Rating    3 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf)    .250-4.750 inches
Sheet Thickness Availability (Off the Shelf)   .125-1.00 inches