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vespel-21Vespel® SP-21 is enhanced with 15% graphite by weight which is added to the base resin for increased resistance and reduced friction in applications such as bearings, thrust washers, bushings, seal rings, slide blocks, and other wear applications.

Vespel® SP-21 has the highest mechanical properties of the graphite filled grades. Automotive engineers love to use Vespel® SP-21 for parts like thrust washers, bearings, and seals because the low-friction properties means they work with or without lubrication.

mco Industrial Plastics doesn’t claim to represent all of the manufacturers or trade name products listed. This list is intended as a guide of typical materials available for purchase from Emco Industrial Plastics, Inc. For additional information, contact an Emco Industrial Plastics representative by filling out the form below.

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At a Glance

Available In
Sheet, Rod

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Technical Information

Stock Products Properties Applications Advantages Grades Downloads

Stock Products

TypeSizeLengthColor
Sheet 0.062″ – 2.0″ 10″ x 10″ Black
Rod 1/4″ – 6″ DIA CTS Black

Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.

 

Properties

Physical PropertiesUnitsASTMResults
Density lb/in3 D792 0.055
Water Absorption. 24 hrs % D570 .19
Mechanical PropertiesUnitsASTMResults
Tensile Strength @yield psi D638 9,500
Tensile Modulus psi D638
Tensile Elongation @Break % D638 4.5
Flexural Strength psi D790 16,000
Flexural Modulus psi D790 550,000
Hardness. Rockwell R D785 E25-45
IZOD Impact Strength Notched ft-lb/in D256 0.8
Thermal PropertiesUnitsASTMResults
Coefficient of Linear Thermal Expansion (x 10-5 in./in./°F) D256 2.7
Max Continuous Operating Temperature °F 500
Heat Deflection Temp at 264 psi °F 680

NOTE: The property values presented above are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.

Applications

  • Bearings
  • Thrust washers
  • Bushings
  • Seal rings
  • Slide blocks
  • Other wear surfaces

Advantages

  • Low wear at high bearing PVs
  • Low coefficient of friction
  • Long-term thermal stability
  • High stiffness
  • Low elongation
  • Outstanding performance
  • Good strength
  • Good impact resistance

Grades

  • Vespel® SP-1
  • Vespel® SP-22
  • Vespel® SP-211
  • Vespel® SP-3

NOTE: Several grades of this material are available. For additional information regarding this plastic, contact your Emco Industrial Plastics representative or call 973-459-4321.

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