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Rulon Bearings

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GEHR Plastics PBT® Polybutylene Trephthalate
Categories: Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT)

Material Notes: Extremely high toughness allows the use of self tapping screws or inserts. The good sliding properties and the high dimensional stability also open up a wide range of possible applications. Very good results can be achieved in joining processes with two component adhesives on the basis of e.g. epoxy resins or cyanoacrylates as well as silicones. Painting of the part or high vacuum coating of the component surface is also possible. The continuous operating temperature ranges from approx. -60°C to 100°C. Properties: high stability, stiffness and toughness even at low temperatures, good creep resistnac, high surface hardness, good polishability, high dimensional stability, easy to metalize, good sliding proerties, good electrical insulation characteristics, high resistnace to chemicals, easy to paint, good UV and weather resistance, sensitive to hydrolysis. Applications: components with metal inserts, pump components, housing components, tankk caps, gear wheels, insulation parts in electrical engineering, applications with UV exposure.

information provided by GEHR

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.33 g/ccISO 1183
Moisture Absorption at Equilibrium 0.25 %ISO 62
Water Absorption at Saturation 0.40 %ISO 62
 
Mechanical PropertiesOriginal ValueComments
Ball Indentation Hardness 156 MPaISO 2039
Tensile Strength at Break 61.0 MPaISO 527
Tensile Strength, Yield 68.0 MPaISO 527
Elongation at Break 15 %ISO 527
Elongation at Yield 8.0 %ISO 527
Modulus of Elasticity 3.005 GPaISO 527
Flexural Strength 82.0 MPaISO 178
Charpy Impact Unnotched 231 kJ/m²ISO 179
Charpy Impact, Notched 3.00 kJ/m²ISO 179
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 3.00e+13 ohm-cmIEC 60093
Surface Resistance >= 1.00e+13 ohmIEC 60093
 
Thermal PropertiesOriginal ValueComments
CTE, linear 90.0 µm/m-°CISO 11359
Melting Point 223 °CDIN EN ISO 3146
Maximum Service Temperature, Air 100 °CUL 746B
Deflection Temperature at 0.46 MPa (66 psi) 170 °CISO 75
Deflection Temperature at 1.8 MPa (264 psi) 58.0 °CISO 75
Vicat Softening Point 200 °CVST/A/50; ISO 306
 219 °CVST/B/50; ISO 306
Minimum Service Temperature, Air -60.0 °CUL 746B
Glass Transition Temp, Tg 50.0 °CDIN EN ISO 3146
Flammability, UL94 HBtest results without UL registration; UL 94
Oxygen Index 24 %ASTM D2863
 
Descriptive Properties
Bondabilityyes
Colornatural
UV Stabilizationyes

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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