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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.
Journals and End Blocks

Journal end screws
Duff-Norton offers the traditional style Type 1 & 3 journal end screws with and without keyed drive ends. These traditional styled journals coordinate well with the Duff-Norton End Blocks and can be delivered quickly. Additionally, Duff-Norton does have the machining capability to provide custom journal ends. Download "Journals and End Blocks" PDF above for more information.

End Block image
Duff-Norton's End Blocks and Screw End Journals are the key to assembling a complete screw and nut system from the Drive End all the way through to Control End. Our End Blocks follow the conventional style, and together with a special journal design allow the user to integrate the following Duff-Norton components; Motor Flanges (Servo, IEC, NEMA frame motors),  Gearmotors (brake, non-brake, IEC, NEMA gearmotors closely coupled with Duff-Norton Motor Flanges), Ring Kit Encoders (coupled between Duff-Norton motor flanges and motors or gear motors Limit Switches and Potentiometers, Control panels - custom designed for each application.)

How does this work? Simply remove the bolts from the End Block's face plate, and use the longer bolts provided in the Duff-Norton kit for that drive or control component for mounting that component to the block face. All mounting holes and surfaces have been designed for proper fit. Duff-Norton specialty screw end journals have also been specifically designed to properly mate with each of these control and drive components. Download "Journals and End Blocks" PDF above for more information.