Ball Screw Worm Drive

Designed with state of the art cad and cae systems and adhering to stringent manufacturing requirements these screw jacks meet all the necessary safety cost efficiency and durability mandates of your application. Please note that higher speeds of travel can be achieved with larger screw pitches or multiple start screws. The third jack subcomponent is the drive sleeve.

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Jacks also have bearings on each side of worm shaft and on top and bottom of drive sleeve.

Ball screw worm drive. Mm per min at 1500 rpm. If eb is negative the thread is self locking. Actionjac inch or metric worm gear ball screw jacks use a ball screw and nut made from hardened alloy steel with hardened bearing balls carrying the load between nut and screw. Worm gear screw jacks.

The screw drives from our own production paired with high quality worm gearboxes result in screw jacks with outstanding properties in terms of lifting power and smoothness. Worm shaft supported on anti friction tapered roller bearings with external seals provided to prevent loss of lubrication sealed radial ball bearings on the series 5 and series 10 units. The drive sleeve is supported on anti friction tapered roller or ball thrust bearings. The worm shaft is supported on anti friction tapered roller bearings with external seals provided to prevent loss of lubrication.

In many cases the screw or worm must be self locking which further restricts the choice of lead. Upright or inverted jacks operate at full capacity in tension or compression. The inch and metric worm gear machine screw jacks incorporate an alloy or stainless steel worm which drives a high strength bronze worm gear drive sleeve. The lifting gear units are available with trapezoidal or ball screw drive with lifting forces from 150 to 500kn.

Rotation of the drive sleeve causes the lifting screw to translate or rotate depending upon jack configuration. The worm gear screw jack s maximum drive revs standard grease lubrication of 1500 rpm must not. Select from standard lead wb wbl and high lead hwb hwbl models to meet your travel speed and ball nut life requirements. Ball screw jacks joyce worm gear ball screw jacks lift and precisely position loads up to 50 tons.

The combination of the worm shaft and drive sleeve makes up the gearing ratio for the screw jack. Rotation of the drive sleeve causes the acme thread lifting screw to translate or rotate depending upon jack configuration. Dd electric cylinder ball screw driven alloy steel worm drives a high strength bronze worm gear drive sleeve. The drive sleeve is supported on anti friction tapered roller or ball thrust bearings.

The worm shaft is supported on anti friction tapered roller bearings with external seals provided to prevent loss of lubrication. This rolling action reduces friction between the nut and the screw permitting smooth and efficient movement of the load. An alloy steel worm which drives a high strength bronze worm gear drive sleeve. Thomson s worm gear screw jacks muli and jumbo set new engineering standards for precision and reliability.

This is the mating part to the worm shaft and is cut to asme standards. Worm gear screw jacks with ball screws achieve between 312 mm per min and 535 mm per min depending on size and lead. To test for self locking the value of back drive efficiency eb must determined.