Metric Anti-backlash Screw Jacks
Metric Anti-backlash Actuators 5 to 500 kN 5-to-500-kN load capacity. Metric 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. When the actuator is under load, the lifting screws threads are supported by the worm gears threads. The anti-backlash…
Read MoreMetric Machine Screw Jacks
Metric Machine Screw Actuators 5 to 200 kN 5 to 500 kN load capacity. Metric Machine Screw Jacks are manufactured to the same high quality standards and include all of the same features and benefits as the standard line of actuators. Metric Machine Screw Actuators offer positive mechanical action, precise positioning, and uniform lifting speeds.…
Read MoreContinuous Duty Screw Jacks
Screw Jacks – 1/4 to 350 Ton 3,500 to 27,000 pound load capacity. Continuous Duty Cycle actuators are specifically designed for continuous operation. The gear set in these actuators operate 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…
Read MoreBall Screw Jacks
Screw Jacks – 1/4 to 350 Ton 1/2-to-50-ton capacity. Ball Screw Jacks provide high efficiency and high speed in one linear positioning package. These actuators come in many standard models, or can be custom designed for any application up to 50 tons. The positive action of the low friction ball screw and nut design provides…
Read MoreMini Screw Jacks
Screw Jacks – 1/4 to 350 Ton Up to 1,000 lbs. capacity. Duff-Norton miniature screw jacks allow for extremely fine adjustments. These small screw jacks are equipped with anti-backlash nuts to minimize vertical backlash between the screw and worm gear nut. The manual operation is accomplished with an easy-to-use hand knob. The dial indicator is…
Read MoreAnode Heavy Duty Screw Jacks
Screw Jacks – 1/4 to 350 Ton The Anode heavy-duty screw jack has been modified for high temperature loads found in the alumina smelting industry. The worm gears are made of wear resistant bronze and are up to 40% larger than our standard versions. This anode screw jack also contains heavy duty seals that protect…
Read MoreStainless Steel Screw Jacks
2-to-100-ton load capacity. Stainless Steel Screw Jacks offer positive mechanical action, precise positioning, and uniform lifting speeds. Standard configurations include upright or inverted units with translating or rotating lifting screws, and top plate, threaded, or clevis ends. Duff-Norton offers a complete line of both standard and custom engineered machine screw actuators for applications up to…
Read MoreAnti-backlash Screw Jacks
Screw Jacks – 1/4 to 350 Ton 1/4-to-250-ton capacity. 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. When the actuator is under load, the lifting screws threads are supported by the worm gears threads. The anti-backlash nut, pinned…
Read MoreEssential Platform Screw Jack
Screw Jacks – 1/4 to 350 Ton Essentials Platform Actuators – 1/8-to-10-ton load capacity. Establishing a strong foundation. The new Essentials Platform is built on Duff-Norton’s history of reliable products and provides customers with cost effective options to meet their fundamental needs.
Read MoreAcme Screw Jack
Screw Jacks – 1/4 to 350 Ton 1/4 to 350 ton capacity. Acme screw jacks offer positive mechanical action, precise positioning, and uniform lifting speeds. Standard configurations include upright or inverted units with translating or rotating lifting screws, and top plate, threaded, or clevis ends. Duff-Norton offers a complete line of both standard and custom engineered…
Read More