Polycarb - Materials - Technical


SPB Products made from this material
Timing Pulleys

A colourless amorphous engineering thermoplastic notable for high impact resistance. It has good temperature resistance, good dimensional stability and low creep. Chemical resistance is limited and it is prone to environmental stress cracking. It has poor fatigue and wear properties in it’s neutral state, but these properties are improved with the addition of fibreglass. Small Parts and Bearings Polycarbonate pulleys are fibreglass reinforced.

Properties of Fibreglass Reinforced Polycarbonate

Physical Properties
Density g/cm3 1.43
Surface Hardness Rockwell M 70
Tensile Strength MPa 70
Tensile Modulus GPa 5.8
Izod Impact Strength J m-1 600-850
Elongation at Break % 3
Max Operating Temp. oC 140
Water Absorption % 0.28 Over 24 Hours
Flammability V-1
Volume Resistivity ohm.cm 1016
Dielectric Strength kV/mm-1 30
Dissipation Factor @ 1MHz 0.009
Dielectric Constant @ 1MHz 3.3
Heat Deflection Temp. @ 0.45 MPa oC 147
Heat Deflection Temp. @ 1.80 MPa oC 142

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

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 polycarbonate timing pulleys online at Small Parts and Bearings Polycarbonate Timing Pulleys Online.

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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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