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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.
Screws & Nuts Application Analysis Form

Duff-Norton Engineers will be pleased to make recommendations for your specific requirements. There is no obligation for this service - simply complete the form below. If you would like to discuss your application with a Duff-Norton
engineer, call 1-800-477-5002.

If you prefer,  Click Here to print a blank Application Analysis Form (pdf), complete the form, and send to Duff-Norton at the fax number or address shown below. If you would like to send a sketch of your application or design drawings in complete confidence, mail or fax to:

Duff Norton Company
PO Box 7010
Charlotte, NC 28241
704-588-1994 FAX

* Required Fields

Type of application

How many actuator units needed

Stroke (Raise)/Unit  in.

How many mitre gear boxes are needed?

Total working load  tons

Working Load per unit

Total static load

Static load per unit

Side thrust on lifting screw lbs.

Off-center load on lifting screw  in. / lbs.

Operating cycles  days per week

 per hour

 hours per day

Life expectancy (inches per cycle x cycles per hour x hours per day x days per year x years of service required)  in.

Lifting speed desired:  in/min.

Are controls required for your system:Are controls required for your system:


Mounting Position:  Limit Switch (pg.121)

 Reducer* (pg. 112)

Load type: :



Temp. range:

Standard actuator model best suited to application:

Ultimate use of actuator units:

Quotation desired on the following quantities: