Yale Engineering Products (PTY) LTD

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Mechanical Actuators

Anode Jacks

Duff-Norton was the originator of the Anode Jack, which was developed in partnership with the Aluminum Industry. Our jacks were used in the first commercial aluminum-making plant in the United States and continue to be used in aluminum plants throughout the world.

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Anti-Backlash Actuator 1/4 Ton to 150 Ton

Anti-backlash actuators reduce vertical backlash resulting in smooth, precise operation and minimal wear. Backlash occurs when the motor driving an actuator reverses its load direction. Since there is a gap between the lifting screw and the worm gear threads, detrimental screw movement may occur. When the actuator is under load, the lifting screws' threads are supported by the worm gears threads. The anti-backlash nut, being pinned by to the worm gear and being adjusted downwards by the shell cap, forces the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum.

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Continuous Duty Cycle 3,500 lbs. to 27,000 lb

Duff-Norton Continuous Duty Cycle actuators are specifically designed for continuous operation. The gear set operates in an oil bath for thermal efficiency and long life. The shell is made of a finned aluminum for better cooling properties. Additionally, the Duff-Norton ball screw system increases these models efficiency.

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Stainless Steel Anti-Backlash 2 Ton to 150 Ton

Stainless Steel Anti-backlash actuators reduce vertical backlash resulting in smooth, precise operation and minimal wear along with the same great corrosion resistance offered by our standard stainless steel actuators. Backlash occurs when the motor driving an actuator reverses its load direction. Since there is a gap between the lifting screw and the worm gear threads detrimental screw movement may occur. When the actuator is under load, the lifting screws threads are supported by the worm gears threads. The anti-backlash nut, being pinned by to the worm gear and being adjusted downwards by the shell cap, forces the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum.

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Stainless Steel Machine Screw 2 Ton to 100 Ton

For harsh environments, Duff-Norton offers a complete line of stainless steel machine screw actuators in standard and special configurations for loads up to 100 tons.

Duff-Norton Stainless Steel actuators incorporate all of the same features as Duff-Norton's standard machine screw actuators, but can be used in severe environments where other materials are inadequate. All exposed surfaces are made of 316 stainless steel including the lifting screw, housing, shell cap, worm and dust guard. Options include: anti-backlash and keyed lifting screws for translating screw models.

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