Vespel® (Polyimide)
Vespel® is a high-performance polyimide material designed for extreme temperature, wear, and vacuum environments. It retains mechanical properties at temperatures where many plastics fail and exhibits excellent wear resistance, low outgassing, and dimensional stability without melting.
Vespel® parts are typically produced through machining from molded shapes, making them ideal for tight-tolerance, high-performance applications.
Key Performance Characteristics
Exceptional high-temperature capability
Excellent wear and friction performance
Low outgassing in vacuum environments
High dimensional stability
Chemical resistance
Typical Components Made with Vespel®
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Bearings & Bushings
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Seals & Wear Rings
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Spacers & Insulators
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Precision Machined Parts
Available Vespel® Grades
Roncelli offers access to a wide range of Vespel® grades, including:
Vespel® SP-1
Vespel® SP-21
Vespel® SCP Grades
Industry Applications & Why Vespel® Works
Aerospace & Defense
Aerospace applications often involve continuous motion, friction, and elevated temperatures.
Vespel® is used in bearings, wear components, and high-temperature structural parts where low wear and thermal stability are required.
Space Systems
Space systems demand materials that operate reliably without lubrication.
Vespel® performs well in moving and load-bearing components where vacuum compatibility and wear resistance are essential.
Semiconductor Capital Equipment
Semiconductor equipment requires materials with low outgassing and high wear resistance.
Vespel® supports bearings and precision wear parts that operate under heat and motion in clean manufacturing environments.
Medical & Life Sciences
Precision medical equipment often operates under continuous motion, load, and thermal stress.
Vespel® performs well in bearings, wear components, and high-temperature structural parts within medical devices and diagnostic systems. Its low wear, low outgassing, and thermal stability support reliable performance in high-duty medical applications.
Downloads — Technical Resources
Download detailed PDF datasheets for each Vespel® formulation:
DO NOT DELETE
Common Formulations
Vespel® SP-1 – Unfilled, High Purity and Dielectric Strength
Vespel® SP-21 – 15% Graphite Reinforced – Basic Bearing Grade, improved wear
Vespel® SP-22 – 40% Graphite Reinforced – Increased Rigidity, Higher Limiting PV
Vespel® SP-211 – Graphite and PTFE Reinforced – Lower Coefficient of Friction, High PV
Vespel® SP-3 – 15% Molybdenum Disulphide Reinforced – enhanced wear resistance
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