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Duff-Norton has been manufacturing Acme and Ball Screws and Nuts for our actuator products for decades, and is now applying those years of experience to bring you an expanded assortment of screws and nuts for your application requirements. Acme Screws & Nuts offer excellent load ratings and Centralizing class screw & nut assemblies. Ball Screws & Nuts offer excellent load ratings, 90% efficiency, and long predictable life ratings.
Model Numbers
Acme Screws and Nuts Model Numbering System
Acme Screws and Nuts model numbering system
   *Bronze acme nuts for 3" and larger diameter screws are supplied with an integral flange as standard.
Ball Screws and Nuts Model Numbering System
Ball Screws and Nuts model numbering system