Rulon® 142

Rulon® 142  is a specially formulated filled PTFE (polytetrafluoroethylene) that is blue-green in color and primarily used as a linear way bearing material. When bonded to a matallic substrate, it has exceptional bearing and wear characteristics.  It unique composition allows for high thermal dissipation and good dimesional stability.  Rulon® 142 has excellent mechanical properties and is the ideal materal for machine tool, and bridge expansion joint applications.  Its low deformation under load characteristics limit the amount of misalignment that can occur with other bearing materials. 

Rulon® 142  has many benefits including, the virtual elimination of stick-slip, vibration dampening, self-lubrication, uniform friction and long life.  Its ease of application and design diversity make it an excellent choice for many demanding slide and way bearing applicaitons.  

Specification Test Value Units
Specific Gravity, 73°F D792  3.16
Tensile Strength @ Yield, 73°F D638  3,100 psi
Tensile Modulus of Elasticity, 73°F D638  230,000 psi
Tensile Elongation (at break), 73°F D638  200 %
Flexural Strength, 73°F D790  550 psi
Flexural Modulus of Elasticity D790   psi
Shear Strength, 73°F D732   psi
Compressive Strength – Ultimate (Bonded to Steel)    5,000 psi
Compressive Strength at 2% Deformation D695  5,000 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  61-63  
Hardness, Rockwell (Scale as noted) D785   Rockwell M
Izod Impact, Notched @ 73°F D256 Type A  5.0 ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007  0.10  
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007  0.15  
Maximum Static Bearing Load (P) (Bonded to Steel) PTM55007  5,000 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/
Sand Wheel Wear/Abrasion Test     UHMW=100
Minimum Mating Surface Hardness     Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA)  4.9 in/in/°F x 10-5
Coefficient of Thermal Expansion (Bonded to Steel) E-831(TMA)  .67 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  250 °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 (Crystalline) Peak D3418   °F
Thermal Conductivity F433   BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149  325 Volts/mil
Volume Resistivity D257   ohm/cm
Surface Resistivity D257   ohm/cm
Dielectric Constant, 106 Hz D150  2.65  
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    3 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf)     inches
Sheet Thickness Availability (Off the Shelf)    .016-.125 inches
Characteristics / Attributes  Bondable/ Extreme High Load / Low Friction