Vespel® is the trademark of a range of durable high-performance polyimide-based plastics.   Vespel® parts offer a unique combination of properties that no other material can match: excellent resistance to extreme heat, good mechanical strength, good solvent resistance, low coefficient of friction, high dielectric strength, excellent dimensional stability, outstanding wear resistance, sealing compliance, high compressive strength, outstanding radiation resistance, low outgassing and toughness.

Since 1963, high strength, lightweight Vespel® parts have helped foster the revolution in aircraft engine design and performance.  This high performance polymer is mostly used in aerospace, semiconductor and transportation technology.

CCT Precision Machining is an industry leader in Vespel® machining.  We are ablto maintain tolerances, create features and produce parts that even the material manufacturers deem impossible. By using high speed spindles capable of turning at 30,000 RPM, tightly controlled work envelopes and cutting edge work holding systems, CCT Precision can machine components from the most simple part to the most intricate part on any of the 25+ machines in our facility.

  • 27” x 15” x 13” Work Envelope
  • Tolerances to +/- .00025” (0.006 mm)
  • Hole Diameters to 0.003” (0.076 mm)

If precision machining of Vespel® parts is what you are looking for, Request a Quote today.

MechanicalASTM Test MethodValueUnits
Strength to Weight Ratio--ksi
Specific Gravity @73 FD7921.43-
Tensile Strength @73 F, (ult)/(yld)D63812,500 (ult)psi
Tensile Modulus of Elasticity @73 FD638-psi
Tensile Elongation at Break @73 FD6388%
Flexural Strength @73 FD79016,000psi
Flexural Modulus of Elasticity @73 FD790450,000psi
Shear Strength @73 FD73213,000psi
Comprehensive Strength, (% Deformation) @73 FD69519,300 (10)psi
Comprehensive Modulus of Elasticity @73 FD695350,000psi
Hardness, Rockwell, Scale as noted @73 FD785(E45)-
Hardness, Durometer, Shore D @73 FD2240--
Izod Impact, (Notched) @73 FD256 Type A0.8ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic-0.29-
Limiting PV, (with 4 to 1 factor of safety applied)--psi-ft/min
ThermalASTM Test MethodValueUnits
Coefficient of Linear Thermal Expansion @73 FE-831 (TMA)3.0 E-05in/in/F
Heat Deflection Temperature @264 psiD648680F
Tg-Glass transition termperature, (Amorphous)D3418-F
Melting Point, (VS=Vicat Softening Temp.)D3418-F
Continuous Service Temperature in Air, (Max.)--F
Thermal Conductivity-2.40BTU-in/hr-ft2-F
MechanicalASTM Test MethodValueUnits
Strength to Weight Ratio--ksi
Specific Gravity @73 FD7921.43-
Tensile Strength @73 F, (ult)/(yld)D63812,500 (ult)psi
Tensile Modulus of Elasticity @73 FD638-psi
Tensile Elongation at Break @73 FD6388%
Flexural Strength @73 FD79016,000psi
Flexural Modulus of Elasticity @73 FD790450,000psi
Shear Strength @73 FD73213,000psi
Comprehensive Strength, (% Deformation) @73 FD69519,300 (10)psi
Comprehensive Modulus of Elasticity @73 FD695350,000psi
Hardness, Rockwell, Scale as noted @73 FD785(E45)-
Hardness, Durometer, Shore D @73 FD2240--
Izod Impact, (Notched) @73 FD256 Type A0.8ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic-0.29-
Limiting PV, (with 4 to 1 factor of safety applied)--psi-ft/min
ElectricASTM Test MethodValueUnits
Dielectric Strength, Short TermD149560Volts/mil
Volume ResistivityD2571E15 - 1E16ohm-cm
Dielectric Constant @10E6 HzD1503.6-
Dissipation Factor @10E6 HzD1500.003-
Flammability @3.1 mm unless notedUL94--
H2OASTM Test MethodValueUnits
Water Absorption, Immersion, 24 hoursD570(7)0.24% by weight
Water Absorption, SaturationD570(7)1.30% by weight