Screw Jacks Catalogs
174Pages

Jacks, Actuators & Systems 800-523*5204 www.joycedayton.com

2 With Joyce's interactive 3D modeling you can now configure, view online, and download 3D models of Joyce/Dayton products directly into your designs. It's easy, too. Just go to the Joyce/Dayton web site (www.joycedayton.com), select a jack category to access the basic model, configure the model in real time and download the model for inclusion in your CAD drawing. The interactive 3D Models are created with SolidWorks™ 3D PartStream modeling program. The program uses simple pull-down menus to guide you through design options that include all existing jack configurations. You can rotate,...

1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com 3 Engineering Overview Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Drive Options & Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Jack Designs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Engineering Information Torque & Horsepower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

4 1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com E N G I N E E R I N G O V E R V I E W — A C C E S S O R I E S , SHAFT MOUNTED ACCESSORIES Electronic and Electromechanical Limit Switches See pages 134-135 Encoders 200 PPR standard See page 133 String Encoders (Contact Joyce) Mechanical Counters See page 131 Geared Potentiometer 0-10V or 4-20Ma analog See page 132 SYSTEM ACCESSORIES Torque Limiting Coupling (Contact Joyce) Shafts and Couplings See pages 140-142 Miter Gear Boxes See pages 137-139 Speed Reducers with...

1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com 5 D R I V E O P T I O N S A N D C O N T R O L S DRIVE OPTIONS Hand Wheel See page 131 Specialty Motors— • AC/DC • Servo • Air • Hydraulic • 575 V, • Single phase • 50 Hz Direct Drive See page 136 for stock AC motor mounts and stock motors. Motor Starters See page 128 Custom Controls Including leveling and synchronization systems. (Contact Joyce) ELS Electronic Limit Switch Positioning to .001" in cre ments; LCD display. See page 134 CONTROLS Chain or Belt Drive (Contact...

6 1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com E N G I N E E R I N G O V E R V I E W — J A C K D E S I G N S Joyce Translating Design Jacks A driven worm acts on an internal worm gear, which in turn drives a lifting screw to extend or retract. As the lifting screw trans lates through the body of the jack, in her ent screw rotation is prevented by an attached load or mounting structure that is anchored to resist rotation. Joyce Keyed Design Jacks Some loads do not prevent lifting screw rotation—these applications...

1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com 7 E N G I N E E R I N G I N F O R M A T I O N — T O R Q U E & H O R S E P O W E R Example: find the horsepower required to raise a 7,000 pound load at 22 inches/minute using a WJT65 screwjack. A. Determine the input speed: From page 18 - 16 turns of the input shaft = 1 inch of linear travel. 16 turns/inch x 22 inches/minute = 352 rpm input required. B. Determine the required input torque: From page 18 - .044 in. lbs. torque re quired to raise each pound of load = .044 x...

8 1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com E N G I N E E R I N G I N F O R M A T I O N — C O L U M N L O A D I N G eccentric loads on the screw. This ec cen tric i ty will tend to increase with greater distance and higher loading. For this reason, double-clevis jacks are severely limited both in capacity and max i mum length. Double-clevis mounting differs from trunnion mounting because the pivot is located further from the jack body. The column load charts do not apply for this mount ing, please consult the...

1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com 9 E N G I N E E R I N G I N F O R M A T I O N — C O L U M N L O A D I N G Machine Screw Jack and Machine Screw Comdrive Column Load Chart Screw Length (inches) This chart includes a 2:1 Factor-of-Safety based on the Euler-Johnson equation for column loading (Oberg, Erik et al: Machinery’s Handbook, 24th Edition. c. 1992 Industrial Press Inc.) The horizontal portion of each line represents the jack’s maximum dynamic capacity. Under static conditions, these lines can be...

10 1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com E N G I N E E R I N G I N F O R M A T I O N — C O L U M N L O A D I N G Ball Screw Jack & Ball Screw Comdrive Column Load Chart Screw Length (inches) This chart includes a 2:1 Factor-of-Safety based on the Euler-Johnson equation for column loading (Oberg, Erik et al: Machinery’s Handbook, 24th Edition. c. 1992 Industrial Press Inc.) The horizontal portion of each line represents the jack’s maximum dynamic capacity. Under static conditions, these lines can be exceeded....

1-800-523-5204 Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. www.joycedayton.com 11 E N G I N E E R I N G I N F O R M A T I O N — C O L U M N L O A D I N G Stainless Steel Screw Jack Column Load Chart (Pounds) Screw Length (inches) This chart includes a 2:1 Factor-of-Safety based on the Euler-Johnson equation for column loading (Oberg, Erik et al: Machinery’s Handbook, 24th Edition. c. 1992 Industrial Press Inc.) The horizontal portion of each line represents the jack’s maximum dynamic capacity. Under static conditions, these lines can be exceeded....