Torlon 4301 (Polyamide-imide)
Torlon® 4301 polyamide-imide offers exceptional properties for bearing and wear components, such as a low coefficient of friction, low expansion rate, and little or not slip-stick during use. Torlon 4301 excels in severe service applications. Several manufacturers produce basic shapes commonly known by the trade names such as Duratron® PAI, and Tecator®. Torlon® 4301 is commonly used for severe service non-lubricated bearings, seals, bearing cages, and reciprocating compressor parts. Machined with standard machining techniques, special care must be taken however to achieve close tolerances. Please feel free to call our technical service department for details.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F | D792 | 1.45 | |
| Tensile Strength @ Yield, 73°F | D638 | 15,000 | psi |
| Tensile Modulus of Elasticity, 73°F | D638 | 900,000 | psi |
| Tensile Elongation (at break), 73°F | D638 | 3 | % |
| Flexural Strength, 73°F | D790 | 23,000 | psi |
| Flexural Modulus of Elasticity | D790 | 800,000 | psi |
| Shear Strength, 73°F | D732 | 16,400 | psi |
| Compressive Strength – Ultimate | psi | ||
| Compressive Strength at 2% Deformation | D695 | 10,000 | psi |
| Compressive Strength at 10% Deformation | D695 | 22,000 | psi |
| Deformation Under Load | % | ||
| Compressive Modulus of Elasticity, 73°F | D695 | 950,000 | |
| Compressive Strength ⊥ to Laminate (Modulus) | psi | ||
| Compressive Strength ⊥ to Laminate (Yield) | psi | ||
| Compressive Strength ⊥ to Laminate (Ultimate) | 10,000 | psi | |
| Hardness, Durometer (Shore “D” scale) | D2240 | ||
| Hardness, Rockwell (Scale as noted) | D785 | M106 | Rockwell M |
| Izod Impact, Notched @ 73°F | D256 Type A | .8 | ft.lbs/in. of notch |
| Coefficient of Friction (Dry vs Steel) Static | PTM55007 | .25 | |
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM55007 | .2 | |
| Maximum Static Bearing Load (P) | PTM55007 | 1,000 | psi |
| Maximum Unlubricated No Load Bearing Velocity (V) | PTM55007 | 900 | ft/minute |
| Maximum Limiting PV (Unlubricated) | PTM55007 | 50,000 | psi x ft/min. |
| Wear Factor “K” x 10-10 | PTM55010 | 300 | 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) | 1.4 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion // to Laminates | E-831(TMA) | 1.4 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion I to Laminates | E-831(TMA) | 1.4 | in/in/°F x 10-5 |
| Softening Point | °F | ||
| Heat Deflection Temperature 264 psi | D648 | 534 | °F |
| Embrittlement Temperature | °F Min. | ||
| Continuous Service Temperature in Air | 500 | °F Max. | |
| Short Term Service Temperature | 500 | °F Max. | |
| Tg-Glass Transition (Amorphous) | D3418 | 527 | °F |
| Melting Point (Crystalline Peak) | D3418 | N/A | °F |
| Thermal Conductivity | F433 | 3.7 | BTU-in/(hr/ft2°F) |
| Dielectric Strength Short Term | D149 | Volts/mil | |
| Volume Resistivity | D257 | ohm/cm | |
| Surface Resistivity | D257 | >1013 | ohm/cm |
| Dielectric Constant, 106 Hz | D150 | 5.4 | |
| Dissipation Factor, 106 Hz | D150 | .037 | |
| Flammability @ 3.1mm(1/8 in.) UL94 | UL94 | V-O | |
| Arc Resistance | seconds | ||
| Water Absorption, Immersion 24 Hours | D570 (2) | .4 | % |
| Water Absorption, Immersion Saturation | D570 (2) | 1.5 | % |
| Machinability Rating | 3 | 1=easy, 10=difficult | |
| Rod Diameter Availability (Off the Shelf) | 1 | 3.0 | inches |
| Sheet Thickness Availability (Off the Shelf) | .25 | 1.00 | inches |
| Characteristics / Attributes | Excellent Bearing and Wear Properties, High Temp, Low Expansion Rate, Self-Lubricating |
