The document discusses a theatre lifting stage jack system for a theatre in France. It includes specifications for a lifting platform that is 15000x10000mm carrying a total load of 2400kN. The system would include 6 screw jacks each with a load capacity of 400kN and 628mm of travel, along with 3 miter gearboxes to connect the screw jacks. An electric motor with a gear reducer is also specified to drive the screw jack system at a speed of 37.5mm/min. Parts for the system like screw jacks, couplings, linking bars, bearings, motors and gearboxes are also referenced.

1. Jacton Electromechanical Co.,Ltd | Tel: +86 769 81585852 | Fax: +86 769 81620195
Email: sales@screw-jack.com | Web: www.screw-jack.com | Skype: jactonjack
Theatre Lifting Stage Jack In France
5 ton theatre lifting stage jack, 10 ton acme screws stage and theatre lifts, 20 ton stage and
orchestra platform lifts
Electric large hoist systems elevating stages lift is widely application for theatre stage synchronous lifting
platform, which structures include multiple screw jacks, miter gearboxes, flexible couplings and line
shaftings. Compared with hydraulic lifting platfrom or electric cylinder actuators lifting platfrom, screw
jack lifting system has self-locking feature without brake or locking mechanism, precisely positioning, full
synchronization, motor driven, easy installation and operation, maintenance free.
France Theatre Stage Lifting Equipment Design Manufacturer
Required: theatre stage lifting platform sizes 15000x10000mm, total 2400kN load on the lifting platform
with safety factors, each screw jack load 400kN, 628mm travel length, electric motor driven, application
layout as below picture.
Design Project:
1. Six screw jacks model JTW-50T-US-628-L-I-C-PP, spindle screw Tr120x20, 50 ton/500kN load
capacity, upright translating screw type, 628mm stroke, low worm gear ratio 32:1, top plate end fitting,
double input worm shafts, additional protective pipe for dust-proof.
2. Three miter gearboxes model JT72-1:1-60R-60R-I-LR-B3 2pcs, JT72-1:1-60R-60R-I-LR-O-B3 1pc.
Input and output shaft 72mm diameter, gear ratio 1:1, input and output 60rpm, maximum drive torque
3206Nm, I-LR, I-LR-O shaft arrangements and direction of shaft rotating and B3 horizontal mounting
positions.
3. One electric motor 15HP, 4pole, 1500rpm with gear reducer ratio 25:1, output 60rpm, foot mounted.
Electric screw jack lifting system speed 37.5mm/min.

2. Jacton Electromechanical Co.,Ltd | Tel: +86 769 81585852 | Fax: +86 769 81620195
Email: sales@screw-jack.com | Web: www.screw-jack.com | Skype: jactonjack
Theatre Lifting Stage Jack In France

3. Jacton Electromechanical Co.,Ltd | Tel: +86 769 81585852 | Fax: +86 769 81620195
Email: sales@screw-jack.com | Web: www.screw-jack.com | Skype: jactonjack
Theatre Lifting Stage Jack In France
Parts 1 – Worm Gear Screw Jacks
Website: http://www.screw-jack.com/jtw-worm-screw-jack/
Website: http://www.screw-jack.com/jt-acme-screw-jack/
Website: http://www.screw-jack.com/jtc-cubic-screw-jack/
Website: http://www.screw-jack.com/jtm-machine-screw-jack/
Website: http://www.screw-jack.com/jtb-ball-screw-jack/

4. Jacton Electromechanical Co.,Ltd | Tel: +86 769 81585852 | Fax: +86 769 81620195
Email: sales@screw-jack.com | Web: www.screw-jack.com | Skype: jactonjack
Theatre Lifting Stage Jack In France
Parts 2 – Jaw Type And Flex Type Couplings
Website: http://www.screw-jack.com/flexible-jaw-coupling.html
Parts 3 – Linking Bars
Website: http://www.screw-jack.com/connecting-shafts.html

5. Jacton Electromechanical Co.,Ltd | Tel: +86 769 81585852 | Fax: +86 769 81620195
Email: sales@screw-jack.com | Web: www.screw-jack.com | Skype: jactonjack
Theatre Lifting Stage Jack In France
Parts 4 – Pillow Block Bearings
Website: http://www.screw-jack.com/pillow-block-bearing.html
Parts 5 – Electric Motors / Geared Motors
Website: http://www.screw-jack.com/electric-motor.html

6. Jacton Electromechanical Co.,Ltd | Tel: +86 769 81585852 | Fax: +86 769 81620195
Email: sales@screw-jack.com | Web: www.screw-jack.com | Skype: jactonjack
Theatre Lifting Stage Jack In France
Parts 6 – Geared Motors
Website: http://www.screw-jack.com/helical-gear-motor.html
Other Products Includes: JT Acme Screw Jack, JTC Cubic Screw Jack, JTW Worm Screw Jack, JTM Machine Screw
Jack, JTB Ball Screw Jack, JTS Bevel Gear Jack, JT Series T Type Spiral Bevel Gear Boxes, JTP Series Cubic Spiral Bevel
Gear Boxes, JTV Series Cubic Spiral Bevel Gear Boxes, JTA Series Lightweight Aluminum Spiral Bevel Gear Boxes, Multiple
Screw Jack System Arrangements, Cast Iron Hand Wheel, Aluminum Hand Crank, Flexible Jaw Coupling, Electric Motor,
Worm Gear Speed Reducer, Geared Motor, Digital Position Indicator, Pillow Block Bearing, Ball Joint Rod End Bearing,
Bellows Boot, Linking Bar, Limit Switches, Swivel Mounting Plate, Pivoting Mounting Base, Planetary Speed Reducer,
Hydraulic Cylinder Rod End Bearing, Frequency Inverter, 24V DC Motor, 12V DC Motor, 36V DC Motor, 48V DC Motor, 24V
DC Motor Gear Reducer, 12V DC Motor Gear Reduction, 36V DC Gear Motor, 48V DC Gear Reduction Motor etc.