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Stainless Steel Machine Screw Jack

Stainless Steel Machine Screw Jacks - 2/3 Ton to 12 Ton

ActionJac™ Stainless Steel Machine Screw Jacks are ideal for use in demanding environments where corrosion resistance is required. All external components are manufactured from 300 series Stainless Steel materials. These jacks use a stainless steel worm with a high strength bronze drive sleeve. Load capacities for Stainless Steel Machine Screw Jacks range from 1,300 to 23,000 pounds. A 17-4PH hardened worm is available for a 300% increase in capacity.

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Engineering Resources

Inch Stainless Screw Jacks

Inch Stainless Screw Jacks

All external components are manufactured from 300 series Stainless Steel materials. These jacks use a stainless steel worm with a high strength bronze drive sleeve.

The drive sleeve is supported on anti-friction tapered roller or ball thrust bearings. Rotation of the drive sleeve causes the acme thread lifting screw to translate or rotate, depending upon jack configuration. The threads are precision formed, typically using Class 2-C (Centralizing) tolerances. Jack lift shaft lead tolerance is approximately ±0.004" per foot.

Machine Screw Jacks having gear rations between 20:1 and 32:1 are self-locking and will hold loads without backdriving in the absence of vibrations. All other ratios may require a brake to prevent backdriving.

TRANSLATING JACKS

A lift shaft moves through the gear box and extends out from the top or bottom. Integrated nut and worm gear for synchronized rotation. When the lift shaft is held to prevent rotation, it moves linearly through the gear box to move the load.

ROTATING JACKS

A lift shaft moves a nut as it turns and is fixed to the worm gear and extends out the bottom or top of the jack. The load (attached to travel nut), moves along the lift shaft.

DOUBLE CLEVIS JACKS
Moves a load through an arc, such as tracking antennas, hinged doors or air dampers. One clevis is mounted on the end of the lift shaft and the other clevis is welded to a heavy duty stem cover, which is welded to the housing.

KEYED JACKS

Prevents rotation of the lift shaft with a square guide attached to the screw translating inside a square stem cover. The square stem tube is supplied with lube fittings. A lift shaft moves through the gear box and extends out from the top or bottom. An integrated nut and worm gear rotate together. When the lift shaft is held to prevent rotation, it moves linearly through the gear box to move the load.

ANTI-BACKLASH SCREW JACK

Used wherever reversible load conditions require precision positioning control. Adjustable backlash Machine Screw Jack models are available to reduce backlash to approximately 0.003".