Page 266 - Engineering Plastics Handbook

228 Engineering Plastics

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Figure 10.5 Aurum seal rings.

robust piston and higher-durability applications. In addition, torque con-
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verter Aurum thrust washers for the Allison transmission 9000 series
replaced expensive metal washers for engineered cost reduction [2].
Moreover, seal ring parts in automotive transmissions have been
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widely used in Aurum automotive applications (Fig. 10.5). Aurum
with thermoplastic properties has made possible the three-dimensional
gap design required for oil leakage control. Also, a tight thermal coeffi-
cient enabled the gap adjustment demanded for each design. JCF3030
is a representative grade for seal applications.
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Automotive turbocharger system parts. Aurum has been selected by NSK,
one of the world’s largest manufacturers, for production of turbocharger
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bearing retainers. Aurum bearing retainers performed well in under-
the-hood conditions of low pressure, maximum velocity of 120,000 rpm,
temperature from 392 to 572°F (200 to 300°C), and steel mating material
with oil lubrication [2].
Other applications are a fluid dam and a valve system washer in a new
generation of viscous fan drives for the on-highway truck and agricul-
tural vehicle markets by Borg Warner Automotive Turbo Systems.
JCL3030 was selected for the superior combination of thermal resist-
ance, dimensional stability at elevated temperatures under load, wear
resistance, and close tolerance by injection-molding capability [2].

Industrial (including business machinery). Designers of industrial machin-
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ery specify Aurum components for a unique combination of high
strength at high temperatures, chemical resistance, and wear resistance.
In applications ranging from bushings for hot-melt glue guns to seals for