How Do I Choose Between Travelling Screw and Travelling Nut Designs? How Does a Translating Screw Jack Work? 3 Types of Machine Screw Jack Designs.

• Application: Motor, Electric Cars, Motorcycle, Machinery, Marine, Toy, Agricultural Machinery, Car, Lifting and Positioning
• Type: Worm Reducer
• Transport Package: Standard Exporting Plywood Cases
• Trademark: JACTON
• Origin: Made in China
• Model NO.: 250 KG to 100-Ton
• HS Code: 8428909090
• Production Capacity: 6000PCS Per Month

Product Description

How Do I Choose Between Travelling Screw and Travelling Nut Designs? How Does A Translating Screw Jack Work? 3 Types of Machine Screw Jack Designs.

Performance of these two options is the same so the choice depends mainly on the mounting requirements. Travelling screw versions have the screw passing through the housing of the jack. Thus the screw remains below the load at all times, but space is needed on the other side of the housing. Travelling nut designs have the screw and housing in a fixed axial position with the nut passing up and down the screw. Note that mounting can be in any orientation. In fact pull forces can be better than push forces because there is no tendency for buckling. Side loads should be avoided.

Screw jacks that are properly selected and maintained will reliably lift, position, support or hold industrial loads for years. Incorporating them into mechanized applications is a fairly simple matter once jack designs are understood. The basic components of machine screw jacks are lifting screw, gear set, and thrust bearing.

Jack Designs Jacks come in three basic designs - Translating, Keyed for Non-Rotation, and Keyed for Traveling Nut. They can be specified with a choice of four standard screw end conditions, plain turned end, load pad end, threaded end, or Male clevis end.
Translating screw jacks are the most commonly specified jacks. With this design a driven worm acts on an internal worm gear, which in turn drives a lifting screw to extend or retract. All that is required for proper function is to restrain the rotation of the lifting screw and apply torque to the input shaft. This is often achieved through the use of guides or by attaching a common load across multiple jacks. It is also possible to attach the jack to a significant load which will overcome inherent rotational forces and allow the load to extend and retract. Most applications use this jack design.
Keyed Jacks are keyed for non-rotation. With this variation of the translating screw 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. It is ideal for use in applications where a single jack must extend to meet and move a load to which it is not attached. Keyed jacks are commonly used in single jack applications where it would not otherwise be possible to restrain the rotation of the jack screw.
Keyed-for-traveling-nut jacks, feature a lifting screw keyed to the internal worm gear as a single unit, forcing the lifting screw to rotate, but not translate. A flanged traveling nut, attached to the load, is driven by the rotation of the lifting screw. Here again, it is important to restrain the rotation of the traveling nut by applying a significant load, or more commonly by guiding the load or attaching the load across multiple jacks. Screw jacks mount flush and are a necessary choice when clearance space is not available for the protection tube.







Important Note: The original actual pictures, videos, designs and molds came from the audited manufacturer and supplier - JACTON Industry Co.,Ltd. Don't copy the pictures, videos, models, designs and drawing dimensions without JACTON permission.

Shipment and Packing Pictures 
Shipping:
1. Ocean freight: seaport to seaport, price terms CIF, FOB, EXW, CFR etc.
2. Air freight: airport to airport, price terms EXW, CRF etc.
3. Air courier: DHL, FEDEX, UPS, TNT door to door shipment, price terms DDU, CPT etc.

Packing: 
100% standard exporting plywood cases. 
Note: International Exporting Standard Wooden Material with Free Fumigation.


JACTON Advantages
1. International standard materials for All JACTON products. 
2. 100% quality assured with double quality inspections.
3. 100% safety transportation with strong standard export plywood cases materials (free fumigation).
4. Internationl sales engineers have professional knowledge and skills on our standard products and service.
5. All our standard products with 2D CAD Drawings and 3D CAD Models.
6. Custom design available, OEM service available, Free engineering advice and Customer label available.


Finished Projects
1. Theatrical solutions stage and orchestra platform lifts projects. Customers are from France, Australia, Netherlands, United Kingdom, Spain and Canada. 
2. Hydroelectric power station projects and water conservancy projects. Customers are from Vietnam, Australia, Malaysia, Russian Federation, Nepal, Pakistan, Belgium, United States and United Kingdom. 
3. Aircraft maintenance platforms and docking systems projects. Customers are from Pakistan, Singapore and United Arab Emirates.  
4. Solar panel tracking system projects. Customers are from Spain, India and Canada. 
5. Bolted steel storage tanks and silos lifting solutions. Customers are from South Africa, United States, Mexico, Russian Federation, Brazil and Vietnam. 
6. Dish antenna elevation and azimuth positioning projects. Customers are from Singapore, Malaysia and United States. 
7. Railway wagon projects. Customers are from South Africa. 
8. Beverage can production lines. Customers are from Netherlands, United States, Thailand and Indonesia. 
9. Steel factories production lines. Customers are from Iran, United States and Turkey. 
10. Continuous PU sandwich panel production lines. Customers are from Thailand and United Kingdom.  


JACTON Customers Areas(Countries)
1. American Countries: United States, Mexico, Canada, Chile, Bolivia, Brazil, Colombia, Dominican Republic, Honduras, Costa Rica, Panama, Puerto Rico, Jamaica, Trinidad and Tobago, Aruba, Argentina, Peru, Venezuela.
2. European Countries: Russia, Germany, Turkey, France, United Kingdom, Italy, Spain, Ukraine, Poland, Romania, Netherlands, Belgium, Greece, Czech Republic, Portugal, Sweden, Hungary, Belarus, Austria, Switzerland, Bulgaria, Denmark, Finland, Slovakia, Norway, Ireland, Croatia, Georgia, Armenia, Lithuania, Slovenia, Estonia, Cyprus, Luxembourg, Iceland.
3. Asian Countries: Malaysia, Indonesia, Singapore, Pakistan, Philippines, Vietnam, United Arab Emirates, Thailand, Saudi Arabia, Iran, Turkey, India, Nepal, Yemen, Taiwan, Sri Lanka, Israel, Jordan, Kuwait, Qatar.
4. Oceanian Countries: Australia, New Zealand, Fiji.
5. African Countries: South Africa, Egypt, Ethiopia, Nigeria, Kenya, Tanzania. 


JACTON Products List
1. Manual Worm Gear Screw Jacks, Electric Worm Gear Screw Jacks.
2. Worm Gear Screw Jacks Series: JT series acme screw jacks, JTC series cubic screw jacks, JTW series machine screw jacks, JTM series worm screw jacks, JTB series ball screw jacks, JTD series cubic ball screw jacks, JSS series stainless steel screw jacks, JTS series bevel gear screw jacks, Non-standard series screw jacks. 
3. Spiral Bevel Gearboxes Series: JT series bevel gearboxes, JTP series cubic bevel gearboxes, JTA series aluminum bevel gearboxes, JTH series hollow shaft bevel gearboxes, BSS series stainless steel bevel gearboxes.  
4. Screw Lifting Systems and Systems Accessories: two-jacks systems, three-jacks systems, four-jacks systems, six-jacks systems, eight-jacks systems. Accessories cover couplings, universal joints, cardan shafts, connecting shafts, electric motors, geared motors and reducers, hand wheel with crank handles, pillow block bearings, flange block bearings, rod end bearings, stop nuts, limit switches, safety nut, travel nuts, linear shafts and bearings, linear guides and bearings, telescopic spring covers, bellows boot, protective tube, trunnion adapter plates, trunnion mounting brackets, motor flanges, rotary encoders, potentiometers, frequency inverters and position indicators etc.
5. Heavy Duty Linear Actuators Series: Parallel heavy duty linear actuators, In-line heavy duty linear actuators.
6. Geared Motors and Speed Reducers Series: helical gearmotors R series, helical bevel gearmotors K series, parallel shaft helical gearmotors F series, helical worm gearmotors S series, small AC gear motor series and worm gear motor reducer series.


Contact Information
JACTON Industry Co.,Ltd (VAT No.: 9144190007026567X3, registered Capital 500000CNY) is a leading manufacturer and supplier in China. JACTON products include worm gear screw jacks, manual screw jacks, electric screw jacks, machine screw jacks, stainless steel screw jacks, custom made screw jacks, ball screw jacks, spiral bevel gearboxes, right angle gearboxes, worm screw jack systems and accessories, heavy duty linear actuators, gearmotors and speed reducers, linear motion products and power transmission products. We are Alibaba, Made-In-China and SGS (Serial NO.: QIP-ASI192186) audited manufacturer and supplier. We also have a strict quality system, with senior engineers, experienced skilled workers and practiced sales teams, we consistently provide the high quality equipments to meet the customers electro-mechanical actuation, lifting and positioning needs. Jacton Industry guarantees quality, reliability, performance and value for today's demanding industrial applications.
Website (English): screw-jacks.en.made-in-china.com
Website (English): screw-jacks.en.made-in-china.com
Website (Chinese): screw-jacks.en.made-in-china.com