JOYCE Interactive 3D Modeling

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2 JOYCE Interactive 3D Modeling Reduce design costs, accelerate time to market, and ensure the accuracy of your designs. 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 ( 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, zoom and pan the model to make it easy to visualize accurately how the product will work in your designs. Plus, 3D models and 2D drawings can be quickly downloaded in over 25 industry standard CAD formats, including AutoCAD, Mechanical Desktop and Autodesk Inventor. For even greater productivity help, check out the inside back cover of this catalog for information on Joyce's free JAX V2.0 linear motion design software. You can always count on Joyce to help you turn your ideas into working systems. 2

3 T A B L E O F C O N T E N T S Engineering Overview Accessories Drive Options & Controls Jack Designs Engineering Information Torque & Horsepower Column Loading Frequently Asked Questions Machine Screw Jacks Machine Screw ComDRIVE Ball Screw Jacks Ball Screw ComDRIVE NEW Stainless Steel Jacks Metric Jacks NEW Bevel Gear Jacks Bevel Ball Actuators Accessories Protective Bellows Anti-Backlash Devices Motor Mounts & Stock Motors Motor Starters Trunnions NEW Handwheels & Counters NEW Geared Potentiometers NEW Encoders Limit Switches Systems Common Arrangements Miter Gear Boxes Flexible Couplings Shafting Specialty Products Anode Jacks Self Leveling Systems Linear Actuators NEW Ordering Information Engineering Overview Engineering Information Machine Screw Jacks Machine Screw ComDRIVE Ball Screw Jacks Ball Screw ComDRIVE Stainless Steel Jacks Metric Jacks Bevel Gear Jacks Bevel Ball Actuators Accessories Systems Specialty Products Linear Actuators Ordering Information Free JAX V2.0 Software NEW Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 3

4 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 Joyce jacks and actuators are at the heart of linear motion systems in thousands of applications throughout industry. Encoders 200 PPR standard See page 119 SYSTEM ACCESSORIES String Encoders (Contact Joyce) Torque Limiting Coupling (Contact Joyce) Shafts and Couplings See pages Proximity Switches (Contact Joyce) Mechanical Counters (See page 117) Miter Gear Boxes See pages Geared Potentiometer 0-10V or 4-20Ma analog (See page 118) Speed Reducers with optional Torque Limiters available (Contact Joyce) Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

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 CONTROLS Hand Wheel (See page 117) Chain or Belt Drive (Contact Joyce) ELS Electronic Limit Switch Positioning to.001" increments; LCD display. See page 120. Specialty Motors AC/DC Servo Air Hydraulic 575 V, Single phase 50 Hz Custom Controls Including leveling and synchronization systems. (Contact Joyce) Direct Drive See page 114 for stock AC motor mounts and stock motors. Motor Starters See page 115. ComDRIVE Self-contained Actuators combine jack, motor and reducer into a single compact unit. Machine Screw pages Ball Screw pages Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 5

6 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 translates through the body of the jack, inherent 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 require a keyed jack. A key, fixed to the jack housing and inserted into a keyway milled into the lifting screw, forces the lifting screw to translate without rotating. Several dimensions of keyed jacks differ from translating jacks check the keyed jack drawings for each jack model. Joyce Keyed For Traveling Nut (KFTN) Design Jacks A keyed for jack (sometimes referred to as a rotating screw jack) features a lifting screw keyed to the worm gear as a single unit, forcing the lifting screw to rotate, but not translate. A flanged, attached to the load, is driven by the rotation of the lifting screw. This type of jack is ideal for applications that cannot accommodate a screw protection tube or require a flush mount. Refer to the keyed for dimensional drawings for each jack model Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

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 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 in. lbs. torque required to raise each pound of load =.044 x 7,000 = 308 in. lbs. C. Determine the jack input horsepower required: 352 rev /min x 308 in. lbs./63025 = 1.72 HP required. Next, utilize this jack in a multiple jack system for example the "H" system shown (see page 122). When calculating the horsepower required to drive a jack system it is usually easiest to break the system up into sections. For example the H system can be viewed as two jack systems joined via a speed reducer or miter box. Always remember to take into account the inefficiencies of miter boxes when calculating system horsepower requirements (use a 90% efficiency for RC and MK style miter boxes). D. Section 1 required horsepower: Total horsepower required for the left side of the system = 1.72 HP/jack x 2 jacks = 3.44 HP. 3.44HP/.9 = 3.82 HP required into the miter box of section A. Since Section 1 is identical to Section 2, Section 2 required horsepower = 3.82 HP. E. Sum sections A & B to determine the amount of horsepower required from the central miter box. Two sections each requiring 3.82HP = 2 x 3.82 HP = 7.64 HP required from the central miter box. Account for the efficiency of the central miter box to determine total horsepower required for the system (A speed reducer may be used here instead of a miter box. If a speed reducer is used, determine the efficiency of the speed reducer as supplied by the manufacturer) HP /.9 = 8.49 HP required into the central miter box and for the system. WJT65 jack Section 1 7,000 lbs. load Section 2 D.1.72 HP from each jack into reducer x 2 = 3.44HP Assume 90% efficiency = 3.82 HP input to each section A. 352 rpm B. 308 in. lbs. input C HP required E. Two sections each requiring 3.82 HP x 2 = 7.64 HP Estimating 90% efficiency, 7.64 HP.9 = 8.49 HP required from motor Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 7

8 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 Column Loading Capacity The type of load on a jack, and the way the jack is mounted, affects its load bearing capacity. There are two types of possible jack loads, tension and compression. A jack is under tension when its load pulls the screw away from the jack, while compression loads push the screw toward the jack (see diagram). A jack can be under tension or compression regardless of jack positioning, i.e. vertical, horizontal, upright or inverted. When tension loaded, the jack retains full rated capacity. Under compression loads however, the screw may not be able to support full capacity. For example, a 2-ton jack with a 15" screw length will be limited to 2293 pounds in compression, about half of the jack s capacity. In compression situations, the load, screw length and jack mounting configuration determine the column strength of the screw. The examples shown illustrate four common mounting configurations. Unguided If the screw is the only support for the load, it is considered unguided. The screw must be large enough to support the load and prevent buckling. On the Column Strength load charts, use the row labeled unguided for the allowable lengths for this design. Trunnion Mounting In a trunnion mounting arrangement, the screw has a pivot on the end and the jack body is mounted on a large pivoting frame, or trunnion. This type of mounting is particularly common in the antenna industry. In practice, the pivot should be as close to the centerline of the ACME nut as the design permits. This will eliminate moment loads caused by loose threads. Use the trunnion row on the charts for this mounting arrangement. Guided Guided loading is often termed fixed-fixed loading. Both ends of the column are rigidly held the jack body is bolted firmly to a sturdy base, and the load travels on slides, bearings, rollers or other means. The guides should be snug enough to prevent any side load or moment load from reaching the screw. Use the guided row in the Column load charts. Double-clevis Mounting: Double-clevis jacks have less load capacity than the other common mounting configurations. A double-clevis jack has pivots or clevises at both ends: one on the screw tip and one on the end of the protection tube. This tends to weaken it as a column by creating eccentric loads on the screw. This eccentricity will tend to increase with greater distance and higher loading. For this reason, double-clevis jacks are severely limited both in capacity and maximum 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 mounting, please consult the factory for load bearing information. How to use the Column load charts: Note: Charts can be used for Machine screw jacks, Ball screw jacks, Stainless steel jacks, Bevel Gear jacks, Bevel Ball actuators and metric jacks. Charts only apply to jacks with axial loads. For side loads, horizontal applications and offset loads, contact the factory. 1. Determine the proper mounting arrangement for your application. Locate the appropriate row and find the screw length at the bottom of the chart. 2. Find the load you need to move (in pounds) on the left side of the chart. 3. Find the point on the chart where the load and length intersect. Choose a jack whose line is on or above this intersection. 4. Add the length of the end condition you have chosen and any additional screw extension to the screw length to find unbraced screw length. Verify your selection using the unbraced length. Example: A jack must lift 5 tons (10,000 pounds) over a distance of 31 inches. The load places the screw in compression. The jack will be mounted firmly by its base, and the load will be attached to a load pad (Type 2 end) and is not guided. 1. Look at the unguided row at the bottom of the Machine Screw Jack Column Load Chart (page 9) and find the 31" mark. 2. Find the 10,000 lb. mark on the vertical axis (left side of the chart). Move to the right along this line until it crosses the 31" line. Any jack above this point should be suitable. 3. From this, the 10-ton double lead jack is selected. Look at the dimensions from the jack body for the Type 2 end for this jack. The Type 2 end adds 2" from the top of the jack to the end of the screw. Thus the total unbraced length of the screw is 33 (31 + 2). 4. Use this new unbraced screw length to verify your selection. In this case, the intersection point still falls below the 10 ton double lead jack line, so this selection is correct. Compression Unguided pivot Guided Tension Trunnion Mount Double-Clevis Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

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 Industrial Press Inc.) The horizontal portion of each line represents the jack s maximum dynamic capacity. Under static conditions, these lines can be exceeded. Please contact factory for assistance Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. (Pounds) 9

10 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 (Pounds) 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 Industrial Press Inc.) The horizontal portion of each line represents the jack s maximum dynamic capacity. Under static conditions, these lines can be exceeded. Please contact factory for assistance Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

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 Industrial Press Inc.) The horizontal portion of each line represents the jack s maximum dynamic capacity. Under static conditions, these lines can be exceeded. Please contact factory for assistance Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 11

12 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 (Pounds) Bevel Gear and Bevel Ball Jacks 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 Industrial Press Inc.) The horizontal portion of each line represents the jack s maximum static capacity Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

13 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 (kn) Metric Screw Jacks Column Load Chart Screw Length (mm) This chart includes a 2:1 Factor-of-Safety based on the Euler-Johnson equation for column loading The horizontal portion of each line represents the jack s maximum static capacity. Under static conditions, these lines can be exceeded. Please contact the Factory Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 13

14 E N G I N E E R I N G I N F O R M A T I O N J A C K S FAQ Q: What is a keyed screw jack? A: Some loads do not prevent lifting screw rotation these applications require a keyed jack. A key, fixed to the jack housing and inserted into a keyway milled into the lifting screw, forces the lifting screw to translate without rotating. Several dimensions of keyed jacks differ from normal jacks check the keyed jack drawings for each jack model.you can view a keyed jack in the Engineering Overview Jack Designs on page 6. Q: What is a Keyed For Traveling Nut (KFTN) screw jack? A: A keyed for jack (sometimes referred to as a rotating screw jack) features a lifting screw keyed to the worm gear as a single unit, forcing the lifting screw to rotate, but not translate. A flanged, attached to the load, is driven by the rotation of the lifting screw. This type of jack is ideal for applications that cannot accommodate a screw protection tube or require a flush mount. Refer to the keyed for dimensional drawing for each jack model. You can view a keyed for traveling nut jack in the Engineering Overview Jack Designs on page 6. Q: How do I calculate linear travel speed of a screw jack? A: Each screw jack has an inherent number of input shaft turns per inch (TPI) of screw travel. TPI is simply the result of the jack s gear ratio divided by screw lead. The TPI can be found on the jack specification pages at the beginning of each jack section. When the input RPM is divided by the TPI, the result is the linear speed of travel in inches per minute. Example: A model WJT 242 has a TPI of 96, if 350 RPM is applied to the input shaft, the resultant linear speed is (350/96) or 3.65 inches per minute. Q: How fast can I move a load with a screw jack? A: Machine screw jacks are designed to move loads at a typical rate of inches per minute. For higher speeds, consider Ball Screw Jacks shown on page 50, Bevel Gear Jacks shown on page 96 or Bevel Ball Actuators shown on page 104. For application assistance refer to your free JAX Software or fill out the Jack/- Actuator Selection Guide on page 154 and fax or mail to our office. Q: What is meant by duty cycle? A: An application duty cycle is the relationship between run time and total cycle time. Example: If a jack is on for 5 seconds of every minute, the duty cycle = 5/60, or 8.3%. Q: What is the allowable duty cycle of a screw jack? A: The allowable duty cycle is based upon several application variables such as load, speed, and temperature. For application assistance refer to your free JAX Software or fill out the Selection Guide on page 154 and fax or mail to Joyce. Q: How do I calculate required input torque/horsepower? A: Locate the Operating Torque Constant found on the jack specification pages at the beginning of each jack section. To calculate horsepower, multiply this constant times your load and divide by 63,025. Example: WJT 242 has a torque constant of.009w with (W) representing the load. Using a 2000 pound load you have (.009 x 2000) = (18 inch lbs. of input torque) at the worm shaft. The formula for horsepower is (Input RPM x Input Torque/63025). Using 350 input RPM you have (350 x 18 / 63025) =.10 or approximately 1/10 HP required. Note: Unlike Bevel Gear and Bevel Ball Actuators, Joyce Machine Screw Jack torque constants vary with speed, therefore the constants listed in the catalog are only accurate for the RPM listed. To calculate horsepower at speeds other than those listed, please refer to your free JAX Software or fill out the Selection Guide on page 154 and fax or mail to our office. Q: What is the difference between upright and inverted jack configurations? A: The difference between an upright and inverted jack is the location at which the jackscrew exits the jack relative to the jack base. For example, an upright jack s lifting screw exits the jack opposite the base. An inverted jack s lifting screw exits the jack on the same side as the base. The choice between an inverted or upright jack is totally dependent upon your application. and inverted jacks can be viewed on any of the jack drawings. Note: An upright jack mounted upside down is still referred to as an upright jack. Q: Can a Joyce screw jack backdrive? Does it require a braking device? A: Most machine screw jacks will not be backdriven, that is, power to the input shaft is required for travel in both directions. Some exceptions include the standard WJ 500 and some DWJ (double lead) models. Under extreme vibration conditions any machine screw jack has the potential to backdrive. Brakemotors should be considered for all these exceptions. Note: Bevel Ball and Ball screw Jacks will backdrive. Brakemotors are a requirement. Q: What is the maximum allowable travel of a screw jack? A: Either the column loading in compression or the availability of screw stock generally limits the maximum allowable travel. Column load limitations for guided, trunnion, and unguided conditions can be found on pages For travels over 20 feet, please contact Joyce Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

15 E N G I N E E R I N G I N F O R M A T I O N J A C K S FAQ Q: What is the calculated life for a screw jack? A: Because of the variables involved, it is impossible to accurately predict the life of a machine screw jack. Bevel Ball Actuators shown on page 104 should be specified if life predictability is required since they are the only screw jacks available with a completely mathematically predictable life. See Bevel Ball Actuator life expectancy charts on page 109. Q: Can I buy a screw jack with a clevis on both ends? A: Yes, when freedom of movement in two axes is required, a double clevis jack may be specified. This design incorporates a clevis machined or pinned on the screw end and a clevis welded to the protection tube. Double clevis units are useful in applications that require actuating a hinged platform or door. Q: What are the standard end conditions for the lifting screws on a screw jack? A: Joyce Machine Screw and Bevel Gear Jacks are available with any of the following four standard end conditions: Type 1 is a plain, turned-down end; Type 2 is a circular load pad with mounting holes; Type 3 is a threaded end; and Type 4 is a male clevis. Please refer to the jack drawings for dimensional information. Note: Ball Screw Jacks and Bevel Ball Actuators have a Type 3 screw end standard. Optional ends are available. Please refer to the jack drawings for dimensional information. Q: What do I need to consider when ordering a bellows boot to protect the jack lifting screw? A: When a bellows boot is ordered for a jack, the closed height dimensions may change from those listed on the jacks without boots. Refer to the chart on pages for jack closed height dimensions. When ordering a bellows boot for an inverted jack, the collar diameter for the end of the boot that fastens to the mounting structure must be customer specified. Q: Can I order a mechanical stop to limit jack screw travel? A: Yes, an optional stop can be ordered on either or both ends of the screw. However, mechanical stops are not intended to be used as operating limits. Engaging the stop may prevent damage to your structure but will most likely damage the jack. To control jack travel, please refer to the limit switches shown on pages 120 & 121. Note: Mechanical stops are standard on all Joyce ComDRIVE jacks. Q: How can I determine wormshaft rotation for raising and lowering the jack? A: The worm shaft rotating as shown (looking down on the jack) raises the load. Screw Center Line Left Side Right Side Q: How much backlash is in a Joyce machine screw jack? A: In machine screw jacks there are two types of backlash. Worm to worm gear backlash (typically 8-15 degrees worm rotation) and lifting screw to lifting nut backlash, sometimes called endplay (up to.020 inches on new standard jacks). Note: Due to the high ratios in worm gearing, worm to worm gear backlash is not a significant factor in most jack applications since it normally corresponds to less than.002 backlash of the lifting screw. Q: Can I reduce the screw backlash? A: Yes, screw backlash (endplay) can be adjusted via any of three following optional anti-backlash devices: Standard split-nut design; A90 external nut adjustment; and our patent pending A95 design. Please consult page 113 for the features and benefits of each design. Q: What is a screw jack's normal operating temperature? A: Our standard lubrication and seals are rated for a temperature range of o F. For operation outside of this range, special lubricant and/or seals can be provided. Please contact Joyce for recommendations. Q: Are Joyce screw jacks lubricated prior to shipment? A: All Joyce Machine Screw, Ball Screw Jacks and Bevel Ball Actuators are lubricated for normal operation before leaving the factory and are ready for use. The standard lubricant provided is an extreme pressure NLGI grade #1 (EP1). Specific information and commercial brand names can be found in our O&M manual. The Bevel Gear Jack utilizes both grease and oil. The upper bearing and jackscrew are both grease lubricated while the remaining internal components are oil lubricated. These jacks are grease lubricated prior to shipment; however oil must be added to the unit prior to operation. Q: What is screw lead error? A: The deviation from the mathematical lead expressed in inches per foot cumulative. Q: What is the amount of lead error in a standard lifting screw? A: Thread Milled Acme Screws up to.003"/ft. cumulative; Ball Screws up to.007"/ft. cumulative; Rolled Acme Screws up to.010"/ft. cumulative. Q: How much side load can I place on a screw jack? A: Standard jacks are not designed to accommodate side loads in a dynamic condition. We recommend the use of external guides when dynamic side loads are expected. Jacks can however accommodate some side loading in a static condition. The screw column length generally becomes the limiting factor in these applications. Please contact Joyce Application Engineering direct at for additional assistance Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 15

16 E N G I N E E R I N G I N F O R M A T I O N A C T U A T O R S FAQ Linear Actuators Q. What are the benefits of a Linear Actuator? A. Joyce/Dayton Linear Actuators offer a complete package solution including actuator, motor, limit switches, and position feedback (potentiometer) Q. What are the duty cycle limitations? A. Joyce/Dayton actuators have been designed and thoroughly tested to meet the duty cycles indicated in the catalog pages under the full load rating of the actuator. No special capacitors or other components are required to meet rated duty cycle. Q. What happens if I lose power? A. The actuator will come to a stop and stay in position until power is re-applied. An integral coil spring brake automatically engages when the motor is not running. Q. What is the clutch and how is it used? A. A screw clutch device is available on units without limit switches. This device allows the screw to turn if the actuator is run against a hard stop. The clutch is an emergency protection device and should not be repeatedly used as an end of travel limit. Integrated Actuators Q. What are the benefits of an integrated actuator? A. Integrated actuators offer maximum design flexibility with a choice of gear ratios, cast NEMA 56C motor mounting, and a choice of precision ACME screw or high speed ball screw drives. Q. Are integrated actuators self-locking? A. The IA51 and IA201 integrated actuators are inherently self-locking. All other models require a motor brake or other external locking device. Q. What motor options are available? A. Joyce/Dayton Integrated Actuators come standard with a NEMA 56C motor mounting so any motor with a 56C mounting can be adapted. Integrated Actuators can be purchased with AC or DC electric motors as well as with air motors. Q. Are the linear actuators user-serviceable? A. A comprehensive O&M manual is supplied with each actuator and some components can be replaced in the field. However, it is often more convenient and cost effective to replace the entire actuator. Q. Are the limit switches pre-set? A. Models with limit switches must be installed prior to setting the limit switch. This allows the flexibility to tailor the stop positions to the individual application Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

17 Versatile Joyce Machine Screw Jacks lift and precisely position all kinds of loads from 250 lbs. to 250 tons. or inverted, these precision jacks operate at full capacity whether the load is in tension or compression. WJ series single lead jacks are self locking under full lifting capacity. DWJ double lead series jacks offer increased travel speed. Heat treated alloy steel worm shafts, aluminum/ bronze worm gears and tapered roller or ball bearings provide rugged reliability. Double extended worm shafts are standard. Single extended worm shafts are available with right or left hand extension or additional length. Joyce jacks come in translating screw (shown), rotating screw (keyed for ) and keyed designs. All jack designs can be fitted with a protective boot. Jacks are available with one of four standard screw ends or special ends to meet your requirements. An optional anti-backlash feature (see page 113) compensates for thread wear, assuring minimum play between lifting screw and worm gear for smooth, precise operation. Jacks equipped with the antibacklash feature are rated at full capacity under static conditions. For jack capacity under dynamic conditions please contact Joyce/Dayton. Joyce/Dayton will custom design jacks to meet special requirements. Ordering Information Order must indicate model number, rise, upright or inverted configuration, translating, keyed to prevent rotation (KEYED) or keyed for (KFTN), type of screw end, with or without protective boot, etc. For complete ordering information see page 152 and Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 17

18 P E C I F I C A T I O N S Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

19 P E C I F I C A T I O N S Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 19

20 250 POUND - 1/2" Screw WJ 250 Material Notes: Housing and protection tube are aluminium Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

21 500 POUND - 1/2" Screw WJ 500 Material Notes: Housing and protection tube are aluminium. Screw is 304 S.S. Input (worm) shaft is 416 S.S Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 21

22 1000 POUND - 5/8" Screw WJ 1000 keyed keyed Material Notes: Housing and protection tube are aluminium. Screw is 304 S.S. Input (worm) shaft is 416 S.S Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

23 1 TON 3/4" - Screw WJ 51 / WJ 201 keyed keyed Material Notes: Housing and protection tube are aluminium Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 23

24 2 TON 1" - Screw WJT 62 / DWJ 62 WJT 122 / DWJ 122 WJT 242 / DWJ 242 WJT 252 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

25 2 TON Reverse Base - 1"Screw RWJT 62 / DRWJ 62 RWJT 122 / DRWJ 122 RWJT 242 / DRWJ 242 RWJT 252 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 25

26 3 TON - 1" Screw WJ 63 / WJ 123 / WJ 243 / WJ 253 DWJ 63 / DWJ 123 / DWJ 243 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

27 5 TON - 1 1/2" Screw WJT 65 / DWJ 65 WJT 125 / DWJ 125 WJT 245 / DWJ 245 WJT 255 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 27

28 10 TON - 2" Screw WJ 810 / DWJ 810 WJ 2410 / DWJ 2410 WJ 2510 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

29 15 TON - 2 1/4" Screw WJ 815 / DWJ 815 WJ 2415 / DWJ 2415 WJ 2515 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 29

30 20 TON - 2 1/2" Screw WJ 820 / DWJ 820 WJ 2420 / DWJ 2420 WJ 2520 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

31 25 TON - 3 3/8" Screw WJ 1125 / DWJ 1125 WJ 3225 / DWJ 3225 keyed Double Clevis keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 31

32 30 TON - 3 1/2" Screw WJ 1130/DWJ 1130 WJ 3230/DWJ 3230 keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

33 35 TON - 3 3/4" Screw WJ 1135 WJ 3235 keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 33

34 50 TON - 4 1/2" Screw WJT 1150 WJT 3250 keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

35 50 TON REVERSE BASE - 4 1/2" Screw RWJT 1150 RWJT 3250 keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 35

36 75 TON - 5" Screw WJ 1175 WJ 3275 keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

37 100 TON - 6" Screw WJ WJ keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 37

38 150 TON - 7" Screw WJ WJ keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators.

39 250 TON - 9" Screw WJ keyed keyed Visit our website now for 2D and Interactive 3D models of all our Jacks and Actuators. 39