• High-performance poly­imide mate­r­ial formed from resin
• Does not melt
• Can oper­ate con­tin­u­ously from cryo­genic tem­per­a­tures to 550°F, with excur­sions up to 900°F
• Low wear, long life in severe environments
• Dimen­sion­ally stable
• Radiation-resistant
• Extremely low outgassing
• Rel­a­tively easy to machine
• Avail­able in fives grades: Vespel SP-1 (unfilled base resin grade), Vespel SP-21 (15% graphic by weight added to the base resin for improved wear resis­tance), Vespel SP-22 (40% graphite by weight added for enhanced wear resis­tance, less fric­tion and improved dimen­sional sta­bil­ity), Vespel SP-211 (10% PTFE and 15% graphite by weight for the low­est coef­fi­cient of fric­tion), and Vespel SP-3 (15% molyb­de­num disul­fide lubricant-filled for wear and fric­tion resis­tance in vac­uum and other moisture-free envi­ron­ments in which graphite becomes abrasive).

Com­mon uses

• Rotary seal rings
• Thrust wash­ers and discs
• Bush­ings
• Flanged bear­ings
• Printer wire guides
• Wear strips
• Wafer clamp­ing, pol­ish­ing and grind­ing rings
• Vacuum pads