Hand Screw Jack Wheel 5000kg 250mm Length Hand Crank Worm Gear Lift in China, Hand Screw Jack Wheel, Screw Jack Manual Lift Assembly, Manual Screw Jack Lift

• Application: Machinery, Marine, Agricultural Machinery, Lifting Systems, Lift Tables, Lifting Platforms
• Hardness: Hardened Tooth Surface
• Installation: Vertical Type
• Layout: Coaxial
• Gear Shape: Bevel Gear
• Step: Single-Step
• Model NO.: JTC50
• Type: Worm Reducer
• Transport Package: Standard Exporting Plywood Cases
• Specification: 5 TONS
• Trademark: JACTON
• Origin: Made in China
• HS Code: 8425491000
• Production Capacity: 4466PCS Per Month

Product Description

Handwheel for the emergency adjustment and manual adjustment of worm gear screw jacks or systems. Safety handwheel for the emergency adjustment and manual adjustment of worm gear screw jacks or systems. Safety handwheels decouple themselves to prevent turning with the spindle. Standstill of the handwheel is guaranteed only up to medium speeds.

All JACTON screw jacks with handwheels are ideal solutions for applications where electricity or power generators is inconvenient or dangerous, light weight, low duty cycle, low target cost and short travel length. Available in load capacity 1/4 ton, 1/2 ton, 1 ton, 2 ton, 2.5 ton, 3 ton, 5 ton, 10 ton, 15 ton and 20 ton, heavy load larger than 20 ton capacity, handwheel manual operation is not recommended. There are two types hand wheels, one is cast iron handwheels, another aluminum handwheels. The cast iron handwheels sizes 100mm, 125mm, 160mm, 200mm, 250mm, 300mm, 400mm and 500mm. The aluminum handwheels sizes 100mm, 125mm, 160mm, 200mm.
Types of Screw Jack: There are a few variations of screw jack available depending on the specific application. These variations can be achieved with either a machine screw jack or ball screw jack and are largely chosen based upon the system architecture in to which they are to be fitted:
Translating Screw Jack: The rotation of the worm wheel acts directly on the lead screw and the lead screw translates linearly. Unless the end of the lead screw is fixed (dependent on customer requirements), the lead screw will tend to rotate due to friction between the screw threads.
Translating Keyed Screw Jack: As above but the lead screw is keyed such that it cannot rotate. This is important if the lead screw end is not to be fixed to the load. Both the keyed and un-keyed translating screws are commonly used in applications where more than one screw jack is attached to a common load.
Rotating Screw Jack: The lead screw is fixed to the worm wheel so rotation of the worm wheel causes rotation of the lead screw thus translating the nut along the lead screw when the nut is attached to the load.
Translating Screw Jack System: The lead screw ends are to be attached to a common load. Clearance is required under the bottom mounting plane of the jack body to accommodate the translating screw cover.
Rotating Screw Jack System: The lifting nuts translate. Clearance under the bottom mounting plane of the jack body is not required but allowance must be made in the lifting platen design to allow the platen to pass over or past the lifting screw.
Translation speed of a screw jack is affected by the number of starts of the lead screw. With single start screw jacks the system is usually self-locking due to the friction angle of the threads being greater than the lead angle. i.e. an axial force applied to the screw does not result in rotation. This is not the case with a multi-start screw as the friction angle may be lower than the lead angle.
If the system in to which the screw jack is to operate has a lot of vibration the screw jack is more likely not to self lock since there is dynamic loading on the threads which may overcome friction. In this case, and in the case of a multi-start screw, the screw jack should have a locking mechanism.
 

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.

Company Profiles
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, Electric Linear Actuators, Gearmotors and Speed Reducers, Others Linear Motion and Power Transmission Products in China. Most of them are passed CE certificates. We are located in Chang An, Dong guan, Guang dong in China. We are an audited professional manufacturer and supplier by SGS (Serial NO.: QIP-ASI192186) and BV (Serial NO.: MIC-ASR202862) organizations. We have a strict quality system, with senior engineers, experienced skilled workers and practiced sales teams, and consistently provide the customers with the best engineered solution for precision linear actuation, power transmission and mechanical jacking systems. Jacton Industry guarantees quality, reliability, performance and value for today's demanding industrial applications.

Company Advantages
* One of the biggest orders with 1750 units screw lift jacks.
* Standard products with 2D Drawings(DXF, DWG, PDF) and 3D CAD Model(STEP).
* 100% quality assured with double quality inspections. Original Inspection Reports, Operation Manual, and Book Catalogue are put into the packages. 
* 100% safety transportation with strong standard export plywood cases materials (free fumigation). 
* International standard materials for all standard products. 
* Custom design available, OEM service available, Free engineering advice and Customer label available.

Products List
* Manual Screw Jacks
* Electric Screw Jacks
* Screw Jacks Series: 
Cubic Screw Jack JTC Series, Machine Screw Jack JTW Series, Trapezoidal Screw Jack JT Series, Worm Screw Jack JTM Series, Stainless Steel Screw Jack JSS Series, Through Hole Screw Jack JTH Series, Ball Screw Jack JTB Series, Cubic Ball Screw Jack JTD Series, Bevel Gear Screw Jack JTS Series, and Electric Cylinder JTE Series.
* Bevel Gearboxes Series: 
Cubic Bevel Gearbox JTP Series, Hollow Shaft Gearbox JTPH Series, Input Flange Gearbox JTPF Series, Input Flange and Hollow shaft Gearbox JTPG Series, Stainless Steel Gearbox JTP Series, Aluminum Gearbox JTA Series, and Spiral Bevel Gearboxes JT Series.
* Screw Jack Lifting Systems and Accessories: 
2jacks lifting system, 3jacks lifting system, 4jacks lifting system, 6jacks lifting system, 8jacks lifting system......14jacks lifting system. Lifting systems accessories cover ac, dc motors, geared motors, servo motors, stepper motors, handwheels, couplings, universal joints, telescopic universal joints, connecting shafts, cardan shafts, limit switches, proximity switches, safety nut, travel nut, rod ends, stop nuts, pillow block bearings, flange blocks, motor flange nema or iec, encoder, potentiometer, frequency converter, position indicators, trunnion plate, and trunnion mounting brackets. 
* Electric Linear Actuators Series:
Electro Mechanical Actuators LA Series, Electro Mechanical Actuators LAP Series. 
* Gear Reducers Series: 
Helical Gear Reducers R Series, Helical Bevel Gear Reducers K Series, Parallel Shaft Helical Gear Reducers F Series, Helical Worm Gear Reducers S Series, Helical Gear Motor GMH/GMV Series, and Worm Gear Reducers NMRV Series.   

Customers Distribution Countries
* American Countries: United States, Mexico, Canada, Chile, Argentina, Bolivia, Brazil, Colombia, Guatemala, Honduras, Panama, Peru.
* European Countries: Germany, France, United Kingdom, Italy, Spain, Poland, Romania, Netherlands, Belgium, Greece, Czech Republic, Portugal, Sweden, Hungary, Austria, Switzerland, Bulgaria, Denmark, Finland, Slovakia, Norway, Ireland, Georgia, Slovenia.
* Asian Countries: Malaysia, Indonesia, Singapore, Philippines, Vietnam, Thailand, India, Israel, Cambodia, Myanmar, Sri Lanka, Maldives, Pakistan, Iran, Turkey, Jordan, Saudi Arabia, Yemen, Oman, United Arab Emirates, Qatar, Georgia, Armenia.
* Oceanian Countries: Australia, New Zealand.
* African Countries: Egypt, Ethiopia, Nigeria, South Africa, Zambia, Mozambique.