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Metric Machine Screw Industrial Linear Actuator
Metric Machine Screw Industrial Linear Actuator

Metric Machine Screw Jacks

Screw Jacks

Metric Machine Screw Industrial Linear Actuator
Metric Machine Screw Industrial Linear Actuator

5 to 500 kN load capacity. Metric Machine Screw Jacks offer positive mechanical action, precise positioning, and uniform lifting speeds.

Free Application Analysis
Duff Norton Capabilities Brochure - Positioning and Process Solutions Mechanical Actuator (Screw Jacks) Design Guide 100 kN Metric Machine Screw Dimensions 10 kN Metric Machine Screw Dimensions 150 kN Metric Machine Screw Dimensions 200 kN Metric Machine Screw Dimensions 25 kN Metric Machine Screw Dimensions 300 kN Metric Machine Screw Dimensions 500 kN Metric Machine Screw Dimensions 50 kN Metric Machine Screw Dimensions 5 kN Metric Machine Screw Dimensions Metric Machine Screw Jack Product Sheet Duff-Norton Product Capabilities Brochure Screw Jack Application Analysis Form

Features and Benefits

FEATURES & BENEFITS

Metric Machine Screw Actuators 5 to 200 kN

Metric Features

Mounting dimensions in millimeters. All metric fasteners on machine screw units. Metric bolt centers. Metric screw diameters with trapezoidal threads.

Standard Configurations

Standard configurations include upright or inverted units with translating or rotating lifting screws, and top plate, threaded, or clevis ends.

Quick, Sure Operation

Duff-Norton metric machine screw cctuators offer positive mechanical action, precise positioning, and uniform lifting speeds.

Uniform Lifting Speeds

Since many actuators feature the same gear ratios different capacities can be used in the same application to lift unevenly distributed loads with uniform speeds.

Learn More About Duff-Norton Screw Jacks

Industrial screw jacks are used to lift, position (push, pull, tilt, roll, etc.) and support all kinds of loads. Some applications where our screw jacks have been used include plastics machinery, beverage bottling systems, aircraft assembly and paper production.

Duff-Norton’s collection of screw jacks range from mini screw jacks supporting up to 1,000 pounds to acme screw jacks with a capacity up to 350 tons and everything in between. Learn about our machine and ball screw jacks.

Learn More About Duff-Norton Screw Jacks
Grouping of Duff-Norton screw jacks

Specifications

Performance Table Instructions 
When reviewing and Duff-Norton Actuator Performance Specification Table, as part of the process of selecting the best-suited actuator for your application, there are several important worm-gear ratios to consider.
Standard Ratio - is frequently chosen when higher speeds and efficiency ratings are desired.
Optional Ratio - is frequently chosen when the application requires higher lifting capacities, lower speeds, or to ease the use of a handwheel.
Numeric Ratio - is frequently chosen for applications requiring fine adjustments, higher lifting capacities, lower speeds, the easy use of a handwheel, self locking applications, and also offers the benefit of an even number of worm input turns per inch of stroke.

Specifications - Metric Machine Screw Actuators - Capacities 5 to 500 (kN)
Capacity (Tons) 5 10 25 50 100 150 200 300 500
Lifting Screw Diameter (mm) 16 20 30 38 52 58 65 95 115
Lead (mm) 3 5 6 9 12 12 12 16 16
Type Metric Trapezoidal
Worm Gear Ratios Standard 5:1 5:1 6:1 6:1 8:1 8:1 8:1 10-2/3:1 10-2/3:1
Optional No. 1 — 20:1 24:1 24:1 24:1 24:1 24:1 32:1 32:1
Optional No. 2 — — 12:1 12:1 — — — — —
Travel per Worm Turn (mm) Standard 0.60 1.00 1.00 1.50 1.50 1.50 1.50 1.50 1.50
Optional No. 1 — 0.25 0.25 0.38 0.50 0.50 0.50 0.50 0.50
Optional No. 2 — — 0.50 0.75 — — — — —
Worm Torque at No Load (N-m) Standard 0.23 0.56 0.56 1.13 2.26 2.26 3.39 5.65 11.3
Optional No. 1 — 0.56 0.56 1.13 2.26 2.26 3.39 5.65 11.3
Optional No. 2 — — 0.56 1.13 — — — — —
Maximum Input Power (kW) Standard 0.25 0.37 1.49 2.98 3.73 3.73 3.75 6.00 11.2
Optional No. 1 — 0.198 0.37 0.56 1.12 1.12 1.12 1.86 4.50
Optional No. 2 — — 0.56 1.49 — — — — —
Worm Torque at Full Load (N-m) Standard 2.83 7.53 20.10 56.78 117.1 189.2 275.4 505.7 915.5
Optional No. 1 — 3.69 9.34 27.06 63.2 101.4 147.7 305.3 520.5
Optional No. 2 — — 12.8 36.65 — — — — —
Efficiency Rating (%) Standard 16.9 21.1 19.8 21.0 20.4 18.9 17.3 14.2 13.0
Optional No. 1 — 10.8 10.7 11.0 12.6 11.8 10.8 7.8 7.6
Optional No. 2 — — 15.5 16.3 — — — — —
Weight with 25mm Raise (kg) 1.04 2.27 7.71 15.88 23.59 29.94 42.18 100 173
Weight per Additional 25mm Raise (kg) 0.04 0.13 0.13 0.40 0.63 0.67 1.16 1.65 2.46
Key Torque (M-n) 8.48 22.80 76.61 213.37 579.94 943.98 1374.01 2954.25 5746.55
Maximum Worm Speed
at Full Load (RPM)		 Standard 844 469 708 501 304 188 129 113 117
Optional No. 1 — 491 378 198 169 105 72 58 83
Optional No. 2 — — 418 388 — — — — —
Maximum Load at Full
Horsepower and 1750
RPM (lb)		 Standard 2.73 2.69 11.84 16.62 19.42 17.90 15.57 20.32 34.54
Optional No. 1

—

 2.21 5.34 4.93 8.40 7.74 5.52 6.61 18.01
Optional No. 2 — — 6.39 12.22 — — — — —
Note: For loads from 25% to 100% of actuator capacity, torque requirements are approximately proportional to the load. Raises, measured in increments
of 25mm, are available up to 6.1 meters, depending on lifting screw diameter and available bar stock length.
Note: Contact customer service for motorized performance.