Torlon 4301: High-PV Bearing Grade PAI for Aerospace
Published: 2026-06-02
Bearing-grade PAI with graphite/PTFE lubrication. PV limit 7.0 MPa·m/s — competes with Vespel SP-21 at 60% cost. For flap track liners, landing gear bushings, thrust washers.
Bearing-grade PAI with graphite/PTFE lubrication. PV limit 7.0 MPa·m/s — competes with Vespel SP-21 at 60% cost. For flap track liners, landing gear bushings, thrust washers.
Technical Properties
| Density | 1.45 g/cm³ |
|---|---|
| Tensile Strength | 130 MPa |
| Melting Point | Amorph (Tg 275°C) |
| Shrinkage Rate | 0.5-0.8% |
| Flexural Modulus | 6.8 GPa |
| Hdt | 278 °C |
Engineering Tool: Shrinkage & Cost Estimator
Calculate part weight, mold cavity dimensions accounting for shrinkage, and material cost — all locally in your browser.
Equivalents & Cross-References
| Equivalent / Alternate | Action |
|---|---|
| Torlon 4301 | |
| Vespel SP-21 |
Frequently Asked Questions
Torlon vs Vespel?
Vespel: higher max temp (300 vs 275°C). Torlon 4301: higher PV (7.0 vs 5.5 MPa·m/s) at ~60% cost.
Related Diagnostics & Materials
PEEK Polyetheretherketone: High-Performance Polymer...
Polyetheretherketone (PEEK) is a colorless organic thermoplastic polymer in the polyaryletherketone (PAEK) family,...
Ultem PEI (Polyetherimide): High-Temperature Amorphous...
Polyetherimide (PEI), best known by Sabic's trade name Ultem, is an amorphous high-performance thermoplastic...
PTFE Teflon: Ultimate Chemical Resistance & Low-Friction...
Polytetrafluoroethylene (PTFE), widely known by the trade name Teflon, is a fluoropolymer with the lowest...
PPS Ryton: Polyphenylene Sulfide High-Temp...
Polyphenylene sulfide (PPS), best known by Solvay's trade name Ryton, is a semicrystalline high-performance...
LCP Vectra: Liquid Crystal Polymer for Micro-Molding &...
Liquid Crystal Polymer (LCP), best known by Celanese's trade name Vectra, is a unique class of thermotropic...
Vespel Polyimide: Extreme-Temperature Polymer for...
Polyimide (PI), commercially known as DuPont Vespel, is the highest-temperature-rated polymer commercially...
PAI Torlon: Polyamide-Imide Extreme-Performance Polymer...
Polyamide-imide (PAI), commercially known as Solvay Torlon, occupies the performance space between PEEK and...
PES Veradel: Polyethersulfone Transparent High-Temp...
Polyethersulfone (PES), commercially known as Solvay Veradel or BASF Ultrason E, is an amorphous high-temperature...
References & Industry Standards
- ASTM International. Standard Specifications for Engineering Plastics & Thermoplastics. astm.org
- UL Prospector. Plastics & Elastomers Material Database. ulprospector.com
- MatWeb. Material Property Data for Engineering Thermoplastics. matweb.com
- ISO 1043. Plastics — Symbols and Abbreviated Terms. iso.org