Which Compound to Use to Manufacture a Pulley

What Is It?

NEXXALON™ PA66 Glass Filled Compound reinforces PA66 with glass fiber at 15% to 40% loading, chemically coupled for efficient load transfer between the fiber and resin.

How It's Manufactured

Glass fiber is melt-compounded into PA66 resin on a twin-screw extruder at PA66's higher processing temperature relative to PA6, with screw design set to preserve fiber length through the higher-shear, higher-heat compounding pass this resin requires.

Manufacturing Process for This Application

Pulleys are injection molded from the dried, reinforced compound. A pulley running against a belt or chain generates continuous frictional heat and cyclic mechanical load at the hub and rim, so gate placement and cooling are set to avoid weld lines at the load-bearing hub.

Why Polymer Choice Matters Here

A pulley needs to hold its round profile and hub dimensions under continuous running heat and load — an unfilled polymer would gradually deform (creep) under this sustained stress, while PA66's inherently higher heat performance than PA6, combined with glass reinforcement, resists both the thermal and mechanical load simultaneously.

Why This Compound Is Suited

The grade's "high dimensional stability with high temperature resistance" is explicitly called out for automotive and automobile parts under continuous mechanical load — precisely the demands a pulley places on its material.

Nexxa Compounds is a leading manufacturer of PA66 compounds for pulley applications in India, supplying some of the largest manufacturers across India and internationally.

Alternate Compounds to Consider

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