polyimide
Graphite-filled polyimide bushings
Graphite-filled polyimide bushings are self-lubricating wear components for dry or lightly lubricated duty. The graphite filler improves tribology so the bushing can run with less external oil while holding shape at high temperature.
Why the graphite is there
Unfilled polyimide already handles heat and wear. Graphite adds a solid lubricant so the bore can survive oscillating or rotating contact when oil is scarce — common in engines, actuators, and control surfaces.
- Low friction
- Excellent wear resistance
- Reduced dependence on external lubrication
- Suitable for oscillating and rotating duty
- Reduced wear on mating components
What to send for a quote
Drawing or sample, the grade you currently specify, continuous and peak temperature, radial load, motion type, speed, and whether the joint is dry. Those eight facts decide the material family faster than a catalog page.
Questions engineers ask
Short answers
Are graphite-filled polyimide bushings self-lubricating?
Yes, in appropriate applications. Graphite-filled formulations provide solid-lubricant characteristics that reduce dependence on grease or oil. Confirm PV, speed, and mating material before specifying dry running.
Is this an alternative to Vespel® SP-21?
DuPont identifies Vespel® SP-21 as a graphite-filled polyimide for bearings, thrust washers, and dynamic seals. Send that grade and we will recommend a comparable option for your drawing.
