Noryl® Rod

Noryl® rod is a modified PPO/PPE (polyphenylene oxide) alloy machining stock that combines excellent dimensional stability, outstanding electrical insulating properties, and the lowest moisture absorption of any engineering thermoplastic. That last characteristic is what sets it apart: because it absorbs virtually no water, Noryl holds tolerance in humid and wet environments where nylon and acetal swell and drift — a decisive advantage for precision turned parts that must stay true in service. It offers good impact strength across a broad temperature range, a service temperature near 200°F, inherent flame retardance with UL 94 V-0 and V-1 ratings in standard grades, and strong resistance to acids, bases, and aqueous solutions.

Noryl rod is turned and machined into electrical insulators and standoffs, terminal and switchgear components, bus bar supports, bushings and spacers, pump and valve internals, water-meter and fluid-handling parts, and precision fixtures and locating pins that must hold dimension in humid conditions. It machines cleanly on standard lathes and mills with good chip formation, taps and threads well, and bonds with adhesives. Two limits are worth knowing: Noryl has only moderate resistance to many organic solvents and chlorinated hydrocarbons compared with polyolefins or fluoropolymers, and standard grades are not UV stable, so outdoor service requires pigmented or stabilized material. Where a turned part must stay dimensionally true in wet or humid service and carry an electrical or flame requirement, Noryl is usually the right answer.