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/ft.lbs.hr | |
| 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 |
