Vespel ® Polyimide SP-3 15% MoS2 Filled

Overview of Vespel® SP-3 Rods and Plates

Vespel® SP-3 is a 15% molybdenum filled (molybdenum disulfide solid lubricant) for wear and friction in vacuum and other waterless environments where graphite is actually abrasive. Typical applications for Vespel SP-3 include seals, bushings, bearings, gears and other abrasive surfaces in outer space, ultra-high vacuum or dry gas applications.

DuPont™ Vespel® SP-3 is a molybdenum disulfide filled grade of DuPont™ Vespel® that provides outstanding friction and wear performance in vacuum and other moisture-free environments where graphite additives can become abrasive.

Vespel® SP-3 Specifications:

ASTM-D 6456-99 Ty 3

AMS 3644 Type 5

Mil-R-46198 Type 3

Key Properties

Excels in Vacuum & Dry Environments

Limitations

Chemical Resistance to Some Strong Acids and Bases

Hydrolyzes in Presence of Steam

DuPont™ Vespel® SP-3 for Spacecraft Applications

DuPont™ Vespel® SP-3 has been widely used for spacecraft applications since the early days of space exploration. Vespel® SP-3 is often specified for bearings, bushings, rollers, and slide pads that require superior friction and wear performance in vacuum conditions. The advantages of DuPont™Vespel® for spacecraft applications include:

Excellent friction and wear characteristics in vacuum

Maintains ductility and moderate modulus throughout a broad temperature range - from cryogenic to elevated temperatures

Excellent flammability characteristics

Good dimensional stability - low and consistent thermal expansion coefficient throughout a wide operating temperature range

Low outgassing

Typical Properties of Vespel ® Polyimide SP-3 15% MoS2 Filled