CRITICAL COMPRESSION BUCKLING LOAD OF A SCREW JACK: When there are compression loads on the screw, it may fail due to buckling, before reaching its static load capacity. If the critical compression buckling load calculated is lower than the actual compression buckling load applied, a screw jack with a larger diameter screw must be selected and its suitability checked. In general, the load applied on the screw jack, including possible impacts, must not surpass the calculated value. The safety factor considered is 3; reconsider this if so considered opportune for the specific application. As a recommendation, when a hypothetical screw jack failure may involve injuries to people, multiply the critical load calculated by an additional factor of 0.6.
CRITICAL RESONANCE SPEED OF A SCREW JACK: Applicable to the TRAVELLING NUT SCREW JACKS version (the screw rotates and the nut moves). With reduced diameter and long length screws, there is a risk of having considerable vibration on turning if this occurs at speeds close to the first vibration frequency (the second and highest correspond to very high speeds, at which the screws never work). In the worst cases, the screw may break and, additionally, the risk of collapse due to side buckling considerably increases. For these reasons, be sure that the screw jack screw works at considerably lower rotation speeds than resonance speeds. If not, select a screw of a larger diameter and/or reduce its turning speed and/or modify the screw jack end supports.
OVERHEATING OF A SCREW JACK: With the aim of avoiding overheating due to internal friction of the screw jacks, the axial strength and the advance speed must be controlled. To do this, check the unit selected. If it does not comply, choose a larger screw jack and/or reduce the load and/or reduce the speed. For very small strokes, please contact the NIASA technical department.
LATERAL LOAD OF A SCREW JACK: JACTON recommends that, if they exist, the lateral loads on the screw must be supported by guide systems designed for this purpose, in addition to the guide for the gearbox, so that the screw or the nut exclusively support axial traction/ compression loads. If there are side loads, the life of the screw jack will be notably reduced, as there will be premature wear of the screw and the nut, which is often the origin of faults.
JTC Series Cubic Screw Jack
2.5 kN Cubic Mini Screw Jack (0.25T)
1. Maximum static load capacity 2.5kN
2. Lifting screw Tr 14x4
3. Gear ratios 5:1, 20:1
4. Custom made travel length
5. Translating, rotating screw design
6. Multiple mini screw jack systems
7. Hand wheel operated, motor driven
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5 kN Cubic Small Screw Jack (0.5T)
1. Maximum static load capacity 5kN
2. Lifting screw Tr 18x4
3. Gear ratios 5:1, 20:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
10 kN Cubic Screw Jack (1T)
1. Maximum static load capacity 10kN
2. Lifting screw Tr 20x4
3. Gear ratios 5:1, 20:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
25 kN Cubic Screw Jack (2.5T)
1. Maximum static load capacity 25kN
2. Lifting screw Tr 30x6
3. Gear ratios 6:1, 24:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
6. Multiple units screw jack systems
7. Hand wheel operated, motor driven |
50 kN Cubic Screw Jack (5T)
1. Maximum static load capacity 50kN
2. Lifting screw Tr 40x7
3. Gear ratios 7:1, 28:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
6. Multiple units screw jack systems
7. Hand wheel operated, motor driven |
100 kN Cubic Screw Jack (10T)
1. Maximum static load capacity 100kN
2. Lifting screw Tr 55x9
3. Gear ratios 9:1, 36:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
150 kN Cubic Screw Jack (15T)
1. Maximum static load capacity 150kN
2. Lifting screw Tr 60x9
3. Gear ratios 9:1, 36:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
200 kN Cubic Screw Jack (20T)
1. Maximum static load capacity 200kN
2. Lifting screw Tr 70x10
3. Gear ratios 10:1, 40:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
250 kN Cubic Screw Jack (25T)
1. Maximum static load capacity 250kN
2. Lifting screw Tr 80x10
3. Gear ratios 10:1, 40:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
350 kN Cubic Screw Jack (35T)
1. Maximum static load capacity 350kN
2. Lifting screw Tr 100x10
3. Gear ratios 10:1, 40:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
500 kN Cubic Screw Jack (50T)
1. Maximum static load capacity 500kN
2. Lifting screw Tr 120x14
3. Gear ratios 14:1, 56:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
7. Multiple small screw jack systems
8. Hand wheel operated, motor driven |
JTW Series Machine Screw Jack
1 Ton Machine Screw Jack (1T)
1. Maximum static load capacity 1 ton
2. Lifting screw Tr 24x4
3. Gear ratios 6:1, 12:1, 24:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
2.5 Ton Machine Screw Jack (2.5T)
1. Maximum static load capacity 2.5 ton
2. Lifting screw Tr 30x6
3. Gear ratios 6:1, 12:1, 24:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
5 Ton Machine Screw Jack (5T)
1. Maximum static load capacity 5 ton
2. Lifting screw Tr 40x7
3. Gear ratios 6:1, 12:1, 24:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
10 Ton Machine Screw Jack (10T)
1. Maximum static load capacity 10 ton
2. Lifting screw Tr 58x12
3. Gear ratios 8:1, 12:1, 24:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
15 Ton Machine Screw Jack (15T)
1. Maximum static load capacity 15 ton
2. Lifting screw Tr 58x12
3. Gear ratios 8:1, 12:1, 24:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
20 Ton Machine Screw Jack (20T)
1. Maximum static load capacity 20 ton
2. Lifting screw Tr 65x12
3. Gear ratios 8:1, 12:1, 24:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
25 Ton Machine Screw Jack (25T)
1. Maximum static load capacity 25 ton
2. Lifting screw Tr 90x16
3. Gear ratios 10-2/3:1, 32:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
35 Ton Machine Screw Jack (35T)
1. Maximum static load capacity 35 ton
2. Lifting screw Tr 100x20
3. Gear ratios 10-2/3:1, 32:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
50 Ton Machine Screw Jack (50T)
1. Maximum static load capacity 50 ton
2. Lifting screw Tr 120x20
3. Gear ratios 10-2/3:1, 32:1
4. Custom made stroke length
5. Translating, rotating screw design
6. Multiple screw jack lift systems
7. Anti-rotation keyed screw design
8. Handwheel, Electric motor operated |
100 Ton Machine Screw Jack (100T)
1. Maximum static load capacity 100 ton
2. Lifting screw Tr 160x23
3. Gear ratios 12:1, 36:1
4. Custom made travel length
5. Translating, rotating screw design
6. Anti-rotation keyed screw design
6. Multiple units screw jack systems
7. Hand wheel operated, motor driven |
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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 brand products. We insist on choosing brand suppliers to supply the high quality raw materials to control the producing process. Optimization constantly the production processes, inspecting in each link and managing production site.
2. 100% quality assured with double quality inspections. The quality inspection by quality inspectors from processing to finished products as the first time. Before packing, the corresponding sales engineers must inspect the orders following the paper drawings, order quantities and special markings in the invoice or sales contracts as the second time. After that, fill in the inspection report with signature and company stamp.
3. 100% safety transportation. Packing with strong standard export plywood cases materials (free fumigation), inner packing with epe foams to prevent products swaying and outer packing with iron sheets and fasteners to fasten the packages.
4. Internationl sales engineers have professional knowledge and skills on our standard products and service. They have enough ability to solve the basic technical problem immediately whatever by phone, online chat, face to face communications.
5. All the standard products with 2D CAD Drawings (PDF, DWG and DXF formats), and 3D CAD Models (STEP, STP, MODEL, IGS, PRT and CATParT formats).
6. Custom design available, OEM service available, Free engineering advice, Free quotes available and Customer label available.
7. Inspection equipments include motor with inverter drive system, height adjustmemt motorized lifting system, coordinate measuring machines, outside micrometers, inside micrometers, depth calipers, vernier calipers, digital calipers, hardness testers, digital noise meters, industrial infrared thermometers, digital speed measuring instruments, digital multimeters, and high precision clamp digital ammeter etc.
8. Processing with modern advanced machines such as CNC gear hobbing machines, CNC flank grinding machines, CNC cylindrical grinding machines, multi-axis CNC milling machines, CNC lathes and others equipments.
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
Dongguan JACTON Industry Co.,Ltd (VAT No.: 9144190007026567X3, registered Capital 500000CNY) is a leading manufacturer and supplier of screw jacks (mechanical actuators), bevel gearboxes, lifting systems, linear actuators, gearmotors and speed reducers, and others linear motion and power transmission products in China. 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
Audited Supplier 
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