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 | 2.22 | - |
| Tensile Strength @ Yield, 73°F | D638 | 2,100 | psi |
| Tensile Modulus of Elasticity, 73°F | D638 | 190,000 | psi |
| Tensile Elongation (at break), 73°F | D638 | 150-200 | % |
| Flexural Strength, 73°F | D790 | 1,950 | 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 | 110,000 | psi |
| 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 | 57-60 | |
| 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 | 150 | °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 | 3.1 | 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 | 2.4 | |
| Dissipation Factor, 106 Hz | D150 | 1.5 | |
| Flammability @ 3.1mm(1/8 in.) UL94 | UL94 | V-0 | |
| Arc Resistance | D257 | >1015 | ohm/square |
| Water Absorption, Immersion 24 Hours | D570 (2) | .02 | % |
| Water Absorption, Immersion Saturation | D570 (2) | .02 | % |
| 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 |