METRIC SCREW JACKS
9Pages

METRIC SCREW JACKS Joyce metric screw jacks, series MWJ, are specifically designed for positioning and lifting applications that must be fully metric. These jacks are commonly used in OEM machinery manufactured in the U.S. and shipped to other countries around the world. They are fully interchangeable with several European products. Metric screw jacks are available in four capacities: 10 kN, 25 kN, 50 kN, and 100 kN. MWJ screw jacks feature: • Industry standard metric (trapezoidal) lifting screw diameters and pitches. • Fully metric mounting hole locations, diameters and fasteners. Joyce/Dayton offers Metric Screw Jacks in several designs including: • Translating • Keyed for non-rotation • Keyed for traveling nut (KFTN) • Double clevis A guide for ordering is on pages 72 and 73. • Alloy steel worm shafts and bronze wormgears and traveling nuts. • Tapered roller or ball thrust bearings provide rugged reliability. Both upright and inverted configurations of these precision jacks operate at full capacity whether the load is in tension or compression. All MWJ jacks are self-locking under full capacity. Metric screw jacks are available with one of four standard screw ends or special ends to meet your requirements. Double input shafts are standard. An optional anti-backlash feature (pages 180 and 181) compensates for thread wear, assuring minimum play between lifting screw and wormgear for smooth, precise operation. All jack designs can be fitted with protective boots. Joyce/Dayton can customize metric screw jacks to meet your specifications. 2D and 3D models available on website • Ordering information on pages 72 and 73

Metric SCREW jacks ORDERING INFORMATION Instructions: Select a model number from this chart. 10 kN Sample Part Number: MWJ65U2S-300–STDX–STDX-B Jack Configuration Left Side Shaft Code Additional Options Right Side Shaft Code (see below) X=Standard Jack, no additional options S=Additional Specification Required (comment as necessary) Anti-Backlash p. 180 A=Split Nut A90=A90 Design A95=A95 Design XXXX=Remove STDX=Standard For optional shaft codes, see page 73. XXXX=Remove STDX=Standard For optional shaft codes, see page 73. Metric Screw Jack Rise Rise is travel expressed in millimeters and...

Metric SCREW jacks SHAFT CODES Instructions: Select the appropriate shaft codes for both right and left hand shafts. One shaft code must be specified for each side Screw Stops (p. 10) and Boots (pp. 170-172) Screw stops are optional on metric screw jacks. When specified, the closed height of the jack and the protection tube length may be increased. When boots are added to metric jacks, the closed height of the jack may be increased. CNT0=0.025 mm increments Note: Contact Joyce/Dayton for availability and options. Recommended for self-locking jacks only. Encoders and Electronic Limit...

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 for assistance. Metric Screw Jacks Column Loading Chart Metric SCREW jacks COLUMN LOADING 2D and 3D models available on website • Ordering information on pages 72 and 73

Metric SCREW jacks SPECIFICATIONS Model Thread Pitch/Lead Worm Gear Ratio Worm Shaft Turns for 1mm Travel Efficiency Rating % Approx. Basic Jack Weight (Kg) Jack Weight (Kg) per 25mm Travel *W: Load in kN. Tare Torque: Initial torque to overcome seal and normal assembly drag. This value must be added to starting torque or operating torque values. Starting Torque: Torque value required to start moving a given load (dissipates to operating torque values once the load begins moving). Operating Torque: Torque required to continuously raise a given load at the input RPM listed. Note: If your...

Metric SCREW jacks 10kN - 20mm Screw MWJ 51 MWJ 201 Note: Drawings are artist’s conception — not for certification; dimensions are subject to change without notice. 2D and 3D models available on website • Ordering information on pages 72 and 73

METRIC SCREW JACKS Upright keyed -j- END CONDITIONS SHOWN AT MINIMUM CLOSE. f (CLOSED HEIGHT DIFFERS FOR UPRIGHT KEYED JACKS) Typical Plan View BOTH ENDS Right Side Left Side Inverted keyed Note: Drawings are artist's conception — not for certification; dimensions are subject to change without notice. 2D and 3D models available on website • Ordering information on pages 72 and 73 sales@joycedayton.com joycedayton.com

METRIC SCREW JACKS END CONDITIONS SHOWN AT MINIMUM CLOSE. (CLOSED HEIGHT DIFFERS FOR UPRIGHT KEYED JACKS) Typical Plan View BOTH ENDS Right Side Left Side Inverted keyed Note: Drawings are artist's conception — not for certification; dimensions are subject to change without notice. 2D and 3D models available on website • Ordering information on pages 72 and 73 joycedayton.com sales@joycedayton.com

METRIC SCREW JACKS Upright keyed THREADED END MALE CLEVIS END END CONDITIONS SHOWN AT MINIMUM CLOSE. (CLOSED HEIGHT DIFFERS FOR UPRIGHT KEYED JACKS) 2D and 3D models available on website • Ordering information on pages 72 and 73 sales@joycedayton.com joycedayton.com