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Ptfe - Materials - Technical

PTFE - Polytetrafluoroethylene

BSO Products made from this material
Balls, Cages on some Ceramic Bearings, Rod

A fluorocarbon based polymer with high chemical resistance, stability at low and high temperature, resistance to weathering, electrical and thermal insulation and extremely low coefficient of friction.

Properties of PTFE

Physical Properties
PROPERTY UNIT VALUE
Density g/cm3 2.15
Surface Hardness   SD63
Tensile Strength MPa 25
Flexural Modulus GPa 0.7
Notched Izod kJ/m 0.16
Linear Expansion per oC x 0.00015
Elongation at Break % 400
Strain at Yield % 70
Max Operating Temp. oC 180
Water Absorption % 0.01
Oxygen Index % 95
Flammability UL94 V0
Volume Resistivity log ohm.cm 18
Dielectric Strength MV/m 45
Dissipation Factor @ 1kHz 0.0001
Dielectric Constant @ 1kHz 2.1
Heat Deflection Temp. @ 0.45 MPa oC 121
Heat Deflection Temp. @ 1.80 MPa oC 54

Chemical Resistance
Chemical Resistance
Acids (Concentrated) Good
Acids (Dilute) Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbon Good
Halogens Good
Ketones Good

Note! Property values are typical and should be used only as a guide to selection of materials and not as purchase specifications.


You can purchase online at Bearing Shop Online Online Catalogue pages.


The Small Parts and Bearings has a much larger range of engineering supplies.

Hobby and Engineering Supplies lists a smaller range of products and only the most popular items in each range. They also list many additional hobby specific categories.

For the best range of miniature and small bearings please try the Miniature Bearings Australia website. Miniature Bearings Australia also list a large variety of miniature engineering products.



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