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  • Screw Jacks
    Screw jacks use the mechanical advantage of threads to lift the workpiece. Jacking may involve spinning a nut to drive a screw or worm gear drive. Most screw jacks fall into one of two categories: ball screw jacks and machine screw jacks. Ball screw jacks use recirculating ball bearings
  • Machine Screw Jack vs. Ball Screw Jack
    and designers must choose the type of jack to select - Ball screw or Machine screw. Both are good choices for reliably lifting and positioning loads, but when should designers choose machine screw jacks and when should they choose ball screw jacks?
  • Screw Jacks are the Ticket for Parking
    Robotic Parking, Inc. faced multiple challenges when building compact parking structures.
  • Pedestrian Walkway: Delivering A Safe, Movable Ferry Bridge On-Time With Nook Ball Screw Jacks
    Isleburn Mackay & Macleod Ltd. designs and fabricates systems and components for large marine-based structures. Recently, the firm won a contract to design and manufacture a movable, covered, pedestrian walkway at the Aberdeen Ferry Terminal in Aberdeen, Scotland. Northlink Ferry Company operates a
  • New Spins on Bearing Technology (.pdf)
    Nook Industries provides a complete selection of inch and metric Ball Screws, Roller Screws, Acme Screws, Lead Screws, End Bearing Supports, Precision Locknuts, Worm Gear Screw Jacks, Electric Actuators, HRC 60 Linear Shafting, Linear Bearings and Pillow Blocks to the Linear Motion Industry
  • Joyce Horse Power Calculation
    and contact Joyce/Dayton. Horsepower Example for a 4-Jack System. Find the horsepower required to raise a system load of 28,000-pounds, a distance of 10 inches, at a speed of 11 in./min., using four WJT125 jacks by referencing the Machine Screw Jacks Specifications. The load per jack is 7000 pounds
  • Good News for Guitarists -- Automated Sander Finishes Frets Fast
    ., on a motion-control architecture that employs six axes of motion to automate the sanding process. Two Baldor vector motors power the rough and smooth sanding belts. Two servomotor axes with ball-screw jacks raise the belts once the workpiece has moved across the sanding faces. The swing-arm jig that holds the fret
  • Loading and Unloading of Cruise Ships
    design; Hamilton Engineering Inc. for the mechanical design; and Technical Systems, Inc. for the controls design and implementation. Loading and Unloading of Cruise Ships | Joyce. Joyce. Home. About Us. Latest News. Careers. Contact Us. Certifications. Products. Screw Jacks. Machine Screw Jacks. Ball

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