Poly-Texx LR166
Poly-Texx LR166
Rulon® LR is a member of the unique family of filled PTFE (polytetrafluoroethylene) products. It is a maroon colored bearing material best known for its versatile design properties pertaining to high temperature and chemically aggressive applications. It is available in rod stock, tubing, sheet and thin film stock. It is also available with ready to bond surface treatment upon request. Usually used as a bearing in sleeve bearing and flat sliding applications, Rulon® LR is compatible with most hardened steel shafting and/or mating surfaces. Mild steel is acceptable although harder surfaces are better. Rulon® LR is virtually chemically inert, making it an excellent choice for bearing and wear components in chemically agressive environments.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F | D792 | 2.27 | – |
| Tensile Strength @ Yield, 73°F | D638 | 1,500 | psi |
| Tensile Modulus of Elasticity, 73°F | D638 | 200,000 | psi |
| Tensile Elongation (at break), 73°F | D638 | 150 | % |
| 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 | 65 | |
| 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 | 1×1015 | ohm/cm |
| Surface Resistivity | D257 | 2×1013 | 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) | .250-1.00 | inches |
| Characteristics / Attributes | Low Coefficient of Friction / Self Lubricating / creep resistant |
