Worm Gear Screw Jacks---Lude Transmission

As we know, screw jack mechanism can be used for crank table. The mechanism usually includes manual screw jacks,connecting shaft, couplings and pillow block. Usually the common used mechanism is 2-set screw jack mechanism. When the table is very long,3-set screw jack mechanism can be selected. When the table is very long and wide, 4-set mechanism can be considered. According to the load capacity, SWL1T/SWL2.5/SWL5T can be selected. Now, let's see a video about the crank table screw jack .

Worm gear screw jacks not only can be used by single unit, but also can be used by multiple units. Multiple screw jacks can make up to   a  screw jack system  together with spiral bevel gearbox,connecting shafts, couplings and motor etc. A screw jack can includes two screw jacks,three screw jacks,four screw jacks,six screw jacks and even more screw jacks. Screw Jack Systems  offer comprehensive lifting and positioning design solutions for a wide variety of industries. Our years of application experience assures that all elements of the design process are considered. When the load is very big, the motor power will be also very large for single screw jacks and the safety factor is low and a guide rail is needed. The performance and components of the screw lift are very unfavorable.  So more people tend to choose four linkages or six linkages, which perfectly solves the problem of too long span. At the same time, multiple linkages are relatively ...

The   trapezoidal screw jacks   ( also named acme screw jacks or   self locking Screw Jacks   )are widely used for metal sheet cutting machine.The most common used jacks are vertical screw jacks   with top plate . Please see the picture as below: The vertical screw jack with top plate is used for conditions which needs anti-backlash function. More   screw jack supplies at   http://www.ludetransmission.com/

Screw Jack System Accessories When you need multiple screw jack arrangement, you will need to use some screw jack system accessories. PP: Protective tube (lifting screw dust-proof and rustproof) BB: Bellows boots (lifting screw dust-proof and rustproof) HW: Hand wheel (hand operated) DC: Digital counter or digital position indicator (installed on worm shaft, precision display stroke) EM: Electric motor (motor driven) GR: Gear reducer (motor driven with reduction gearbox) WR: Worm gear reducer (motor driven with worm reduction gearbox) LS: Limit switches (control stroke, when full extend or full retract travel, the motor will stop ) SN: Stop nut (installed at the bottom of lifting screw, prevent lifting screw from being removed from the jack housing) PB: Pillow block bearing (when long distance between the supports, pillow block bearing is recommended) FB: Flange pillow block bearing (when rotating screw jacks with long stroke or unguided, flange pillow block bearing is recommended) ...

The main advantages of   electric worm gear screw jack   are: Higher Performance · Accurate and smooth delivery of force. · Increased range of actuation as the stroke position is easily and quickly varied. · Electro-mechanical solutions are more resistant to temperature variations. · Complete control of the entire motion profile using standard control methods. · Repeatable and accurate positioning. Reduced Costs · The   electro-mechanical screw jack   is generally cheaper when compared to a hydraulic system when the required ancillary hydraulic equipment is included. · Machinery requires less maintenance as no hydraulic oil to maintain, no leaks to repair. · Less manual intervention on machinery to set up processes as electro-mechanical solutions can be controlled over the complete motion profile. · Reduced downtime caused by hazardous fluid leaks. · Electro-mechanical solutions only use pow...

Sometimes customers look for screw jacks with anti-rotation function. Then lets us see more about anti-rotation device. When Work Screw rotation must be prevented, the Jacks can be realized with keyway along the Work Screw, a matching key (6) is fastened to the cover of the Jack which will eliminate Work Screw rotation. This design is only available for   translating screw jacks . If the structure/object connected to the lead screw is not prevented from rotating or the lead screw is not always in contact with the structure then a screw jack with an   “ Anti-Rotation ”   mechanism (keyed) should be used. For machine screw jacks the mechanism uses an internal key to prevent the lead screw from rotating. Anti-rotation device is suggested for limited strokes and low speed. The Anti-rotation device causes greater than normal wear on the Work Screw, somewhat reducing Jack life. For ball screw jacks a guided element fixed to the ball screw is used to prevent the b...