polyimide
Polyimide bushings
Polyimide bushings are precision-machined polymer bearings for applications where conventional plastics and metals struggle with temperature, friction, wear, weight, or dimensional stability. Dominion manufactures them in graphite-filled and unfilled grades from your drawing.
What a polyimide bushing is for
A bushing is a controlled bearing surface between two parts. Polyimide earns the slot when the stack-up includes high temperature, low friction, wear, and tight fit — often with little or no oil.
- High-temperature capability
- Low friction and wear resistance
- Low weight vs. metal
- Dimensional stability
- Chemical resistance
- Reduced or eliminated lubrication
Filled or unfilled
Graphite-filled grades favor dry-running tribology. Unfilled grades favor electrical insulation and a classic amber appearance. Material selection starts with temperature, load, motion, lubrication, and mating surface — not a catalog color.
How we manufacture
We machine bushings to customer drawings: plain, flanged, split, stepped, grooved, and thin-wall. Fit, concentricity, and surface finish are treated as functional requirements, not cosmetics.
Questions engineers ask
Short answers
When should I specify a polyimide bushing instead of bronze?
Use polyimide when you need lower weight, dry or limited lubrication, electrical insulation, or temperature performance beyond common engineering polymers. Stay with metal when hardness or structural support dominates.
Do you stock catalog polyimide bushings?
We manufacture to drawing, sample, or application requirements rather than selling a fixed catalog of sizes. Send the dimensions and we will quote the part.
Can you match a Vespel® bushing specification?
Send the grade currently specified. We review the requirement and recommend a comparable unfilled or graphite-filled polyimide option. See Vespel® alternatives.
