FeaturesJacton Industry JTC Series Machine Screw Jack Maintenance Manual Caution,hand wheel screw jack worm gear screw lifting mechanismThe longer the stroke, the less load it can lift, considering the compression limit of the screw. It can powered by motor, belt or handwheel. Can be mounted uprightly, horizontally or inverted for different applications with different screw end. It is stable, accurate and space saving.
A manual screw jack is consist of a hand wheel and a complete worm gear screw jack. The screw jack makes it possible to transform the rotary motion provided by a handwheel, into linear motion that allows push or pull vertical lifting and horizontal positioning. They can be used to lift, pull, move, or align any type of load with perfect synchronism, which is difficult to achieve with other types of actuators.They can be applied either with vertical mountings facingup or down, or with horizontal mountings.
All screw jacks can be moved manually via a handwheel. To do this, 1 input shaft shall be available on the screw jack for the connection of the handwheel. Manual screw jacks are available in load capacity 0.25 ton, 0.5 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, manual operated screw jack is not recommended. They are ideal solutions for applications where electricity or power generators is inconvenient or dangerous, or in case of power failure, light weight, low duty cycle, low speed, low target cost, short stroke, and intermittent positioning applications. If must be not backdriving, a self locking machine screw jack with handwheel is the best choice. If high speed ball screw jack with handwheel, locking mechanisms need to be considered. If a brake motor is used, the brake shall be un-clamped firstly, so to allow for movement.

Cast Iron Handwheel Diameter 125mm, 160mm, 200mm, 250mm, 300mm and 400mm, larger diameter handwheel is available, please consult CZPT Industry. The recommended screw jack with 0.25 ton, 0.5 ton, 1 ton, 2 ton, 2.5 ton, 5 ton, 10 ton, 15 ton, 20 ton capacities are available in matching cast iron handwheel for hand-operation application.

Aluminum Handwheel with Folding Handle Diameter 125mm, 160mm and 200mm. The recommend screw jack 0.25 ton, 0.5 ton, 1 ton, 2 ton, 2.5 ton, 5 ton capacities are available in matching aluminum handwheel for hand-operation application.

In order to precise position display of the travel length, the worm shaft adds a digital position indicator which measures the rotation and display a corresponding position in a counter window. There are 3 sizes position indicators: 04 series position indicator 4 numbers with 14mm hollow shaft, 09 series position indicator 5 numbers with 20mm hollow shaft, 10 series position indicator 5 numbers with 25mm or 30mm hollow shaft. Note: inapplicable motorized screw jacks.

Miniature Hand Wheel Manual Screw Jack with Clevis End, or Top Plate End
Mini compact CZPT screw jack 2.5 KN capacity, translating screw configuration, upright mount, gear ratios 1/5 (one rpm input travel length 0.8 mm), 14mm diameter lifting screw and 4mm screw leads(pitch) as standard, stroke 65mm, clevis end, or top plate, 500 kg Chain Pulley Block Hand Operated Hoisting Equipment Manual Lever Hoist 0.5 ton Chain Block manual small hoist 2 input shafts, attached handwheels 125mm diameter.
Hand Operated Screw Jack 50 kN
Cubic manual screw jacks load capacity 50 kN, self locking trapezoidal screw diameter 40mm, pitch 7mm, upright mount, translating screw type, stroke 500mm, ratio 7:1 (one rpm input travel length 1mm), threads end attaches rod end bearing, double input shafts, attached protect pipe, and hand wheels diameter 300 mm.

5 ton stainless steel hand crank screw jack for lifting tables. Stainless steel worm gear screw jack 5 ton capacity, translating screw configuration, inverted mount, gear ratios 1/12 (one rpm input travel length 0.59 mm), 40mm diameter lifting screw and 7mm screw leads(pitch) as standard, stroke 1200mm, clevis end fitting, right input shaft and left motor flange, attached handwheel 200mm dia., and electric motor with motor flange.

Manual Operated Worm Gear Jack Screw 5tonnes

Hand Worm Screw Lift Jacks 2.5 tonnes

Manual Screw Jack 5 ton
Crank screw jacks with 5 ton capacity, anti-rotation keyed screw configuration, upright mount, gear ratios 1/7 (one rpm input travel length 1 mm), 40mm diameter lifting screw and 7mm screw leads(pitch) as standard, stroke 350mm, thread end screwed into rod end(set screws fix), right shaft and left shaft, attached handwheels 300mm diameter, rod end bearings, protective pipe and digital counters.

2.5 ton hand operated screw jack lift for industrial vintage cast iron crank dining crank table base. Hand wheel screw jack with 2.5 ton capacity, upright installation, translating screw configuration, gear ratios 1/6 (one rpm input travel length 2 mm), 30mm diameter CZPT screw and 12mm(2P) screw leads(pitch) as standard, stroke 300mm(12″), top plate(flange) end fittings, 2 input shafts, attached handwheel 200mm(8″) or 300mm(12″) diameter, couplings and drive shafts.

2.5ton Stainless Steel Manual Operate Screw Jack with Traveling Nut for Hand Crank Lift Systems. Stainless Steel Machine Screw Jack 2.5 ton capacity, rotating screw configuration, upright mount, gear ratios 1/6 (one rpm input travel length 1 mm), 30mm diameter lifting screw and 6mm screw leads(pitch) as standard, stroke 500mm, plain end fitting, 2 input shafts, attached handwheels 200mm dia., and copper travel nut.

10 ton hand wheel worm gear screw jack for screw jacks platform lift. Hand-operated machine screw jack (or linear actuator) type device 10 tons capacity, upright installation, translating screw configuration, gear ratios 1/8 (one rpm input travel length 1.5 mm), 58mm diameter machine screw and 12mm screw leads(pitch) as standard, stroke 500mm, top plate(flange) end fitting, 2 input shafts, attached handwheels 300mm(12″) diameter.

5ton hand operated lifting screw jacks for mechanical hand crank lift table. Manual machine screw jack 5 tons capacity, translating screw configuration, upright mount, gear ratios 1/6 (one rpm input travel length 1.167 mm), 40mm diameter lifting screw and 7mm screw leads(pitch) as standard, stroke 150mm, Powder Metallurgy Parts Precision Metal Bushing Casting Sintered Iron Bushes Bearing Sleeve Bore clevis end fitting, 2 input shafts, attached handwheels 300mm(12″) diameter, protect tube and bellows boots.

1 Ton Manual Worm Gear Screw Jack for Llifting

Mechanical screw jacks can be operated by manually or by electrical motor. More than 1 screw jacks can be connected together to move simultaneously.Mechanical Lifting and Pulling Screw Jacks These models are used instead of hydraulic jacks where pushing and pulling is neeed between heavy components espacially in industrial building construction works, industrial machinery installations, bridge constructions.Working principle of screw jacksTravelling Screw Type: Main components of screw jacks are; trapezoidal lifting screw, worm screw, worm gear and gear housing. Worm screw is rotated manually or by motor. Worm gear is rotated by worm screw. The lifting screw moves through the rotating worm gear. If free load connected to screw jack, screw will rotate circularly and move up ande down. If it is constantly load, screw will move vertical ways linearly. The linear motion speed of lifting screw depends on thread size and rotation ratio of worm gears.Anti-rotation Keyed Screw Type: Main components of screw jacks are; trapezoidal lifting screw, worm screw, worm gear and gear housing. Worm screw is rotated manually or by motor. Worm gear is rotated by worm screw. The lifting screw moves through the rotating worm gear. In order to prevent/block screw’s rotation, wedge should be opened to screw. By this way, the screw can just move vertically. Screw connection type’s importance will be put away. The linear motion speed of lifting screw depends on thread size and rotation ratio of worm gears.Travelling Nut Type: Main components of screw jacks are; trapezoidal lifting screw, worm screw, lifting nut and gear housing. Worm screw is rotated manually or by motor. With the rotation of the gear, the screw that is inside the screw jack only makes its rotation about its axis. The flange, which is produced from the bronze material on the screw shaft moves linearly upwards or downwards. One of the purposes of using such systems is the lack of ducting or storage for the movement of the screw used in the screw type and screw type cockp. Although screw jack doesn’t lift down from bottom. The linear motion speed of lifting screw depends on thread size and rotation ratio of worm gears.
Manual screw jack (hand wheel screw jacks, hand crank screw jacks, hand operated screw jacks) is driven by a hand wheel or crank or handle. The best advantage is suitable for heavy load, low speed, low service frequency. Our manual screw jacks have different configuration form and assembly type,and the lifting height can highly customized according to users’ demand, low cost and easy operation.
Our standard jacks use Trapezoidal screw and have self-locking function which is very safe for manually operated by hand. We have different models for your selection, our jtw series machine screw jack is the most cost-effective selection for this application. You can also use digital position indicators if you need more precise position display. It can measure the rotations of the input shaft and display the corresponding position in the digital counter window. The display value per input shaft revolution is variable and is achieved through a series of gear reductions configured to accommodate different worm gear screw jack ratios, screw pitch, and travel length.
Packaging & ShippingShipping:1. CZPT 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.

Our Advantages* One of the biggest orders with 1750 units screw 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.

Finished Projects1. 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, Belgium, United States and United Kingdom. 3. Aircraft maintenance platforms and docking systems projects. Customers are from Singapore. 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 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, Roofing and Gin Block Thailand and Indonesia. 9. Steel factories production lines. Customers are from United States. 10. Continuous PU sandwich panel production lines. Customers are from Thailand and United Kingdom.
Other Products* Manual Screw Jacks.* Electric Screw Jacks.* Worm Gear Screw Jacks Series.* Bevel Gear Screw Jack Series.* Electric Cylinders Series.* Spiral Bevel Gearboxes Series.* Lifting Systems and Accessories.* Electric Linear Actuators Series.* Geared Motor and Gear Reducers Series.

Clients Countries1. American Countries: United States, Mexico, Canada, Chile.2. 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.3. Asian Countries: Malaysia, Indonesia, Singapore, Philippines, Vietnam, Thailand, India, Israel.4. Oceanian Countries: Australia, New Zealand.5. African Countries: South Africa, Egypt.

Contact InformationJACTON INDUSTRY Co., Ltd (VAT No.: 9144190007026567X3) is 1 of the leading companies in the field of Screw Jacks(Mechanical Actuators), Bevel Gearboxes, Lifting Systems, Linear Actuators, Gearmotors and Speed Reducers. We are an audited professional manufacturer and supplier by SGS (Serial NO.: QIP-ASI192186) and BV (Serial NO.: MIC-ASR257162) 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. CZPT Industry guarantees quality, reliability, performance and value for today′s demanding industrial applications.

FAQ
1. What type of payment methods do you accept?
We accept Wire transfer, Credit Card, Paypal, Alibaba Trade Assurance order, Western Union and L/C etc.
2. Can I get 1 sample to test?
Yes, sample can be at a normal price and welcomed. The transport fees are at your account.
3. How about the quality of your product?
Jacton industry is only focus on the field of Screw Jacks(Mechanical Actuators), Bevel Gearboxes, Lifting Systems, Linear Actuators, Gearmotors and Speed Reducers. 4. OEM/ODM Accepted?
Yes, Please send you new product drawings or sample to us if you have, and we can custom-made as your required. We will also provide professional advices of the products to make the design to be maximize the performance.
5. If you can not find the product on our website,how do you do?
Please send us inquiry with product pictures and drawings by email or other ways you prefer, we’ll check if we could produce.
6. Can I trust you?
Absolutely yes. Samples could be provided to test firstly, and we can use Alibaba trade assurance service to do business to guarantee both the seller and buyer’s benefit, and we are golden supplier for years.
7. What’s our products warranty?One year quality guarantee for the products from your purchase date, Factory price good chemical stability black nylon PEEKPOM plastic sleeve plastic spacer nylon bushing except the human damage.

How to Select a Worm Shaft and Gear For Your Project

You will learn about axial pitch PX and tooth parameters for a Worm Shaft 20 and Gear 22. Detailed information on these two components will help you select a suitable Worm Shaft. Read on to learn more….and get your hands on the most advanced gearbox ever created! Here are some tips for selecting a Worm Shaft and Gear for your project!…and a few things to keep in mind.

Gear 22

The tooth profile of Gear 22 on Worm Shaft 20 differs from that of a conventional gear. This is because the teeth of Gear 22 are concave, allowing for better interaction with the threads of the worm shaft 20. The worm’s lead angle causes the worm to self-lock, preventing reverse motion. However, this self-locking mechanism is not entirely dependable. Worm gears are used in numerous industrial applications, from elevators to fishing reels and automotive power steering.
The new gear is installed on a shaft that is secured in an oil seal. To install a new gear, you first need to remove the old gear. Next, you need to unscrew the two bolts that hold the gear onto the shaft. Next, you should remove the bearing carrier from the output shaft. Once the worm gear is removed, you need to unscrew the retaining ring. After that, install the bearing cones and the shaft spacer. Make sure that the shaft is tightened properly, but do not over-tighten the plug.
To prevent premature failures, use the right lubricant for the type of worm gear. A high viscosity oil is required for the sliding action of worm gears. In two-thirds of applications, lubricants were insufficient. If the worm is lightly loaded, a low-viscosity oil may be sufficient. Otherwise, a high-viscosity oil is necessary to keep the worm gears in good condition.
Another option is to vary the number of teeth around the gear 22 to reduce the output shaft’s speed. This can be done by setting a specific ratio (for example, five or ten times the motor’s speed) and modifying the worm’s dedendum accordingly. This process will reduce the output shaft’s speed to the desired level. The worm’s dedendum should be adapted to the desired axial pitch.

Worm Shaft 20

When selecting a worm gear, consider the following things to consider. These are high-performance, low-noise gears. They are durable, low-temperature, and long-lasting. Worm gears are widely used in numerous industries and have numerous benefits. Listed below are just some of their benefits. Read on for more information. Worm gears can be difficult to maintain, but with proper maintenance, they can be very reliable.
The worm shaft is configured to be supported in a frame 24. The size of the frame 24 is determined by the center distance between the worm shaft 20 and the output shaft 16. The worm shaft and gear 22 may not come in contact or interfere with one another if they are not configured properly. For these reasons, proper assembly is essential. However, if the worm shaft 20 is not properly installed, the assembly will not function.
Another important consideration is the worm material. Some worm gears have brass wheels, which may cause corrosion in the worm. In addition, sulfur-phosphorous EP gear oil activates on the brass wheel. These materials can cause significant loss of load surface. Worm gears should be installed with high-quality lubricant to prevent these problems. There is also a need to choose a material that is high-viscosity and has low friction.
Speed reducers can include many different worm shafts, and each speed reducer will require different ratios. In this case, the speed reducer manufacturer can provide different worm shafts with different thread patterns. The different thread patterns will correspond to different gear ratios. Regardless of the gear ratio, each worm shaft is manufactured from a blank with the desired thread. It will not be difficult to find one that fits your needs.

Gear 22’s axial pitch PX

The axial pitch of a worm gear is calculated by using the nominal center distance and the Addendum Factor, a constant. The Center Distance is the distance from the center of the gear to the worm wheel. The worm wheel pitch is also called the worm pitch. Both the dimension and the pitch diameter are taken into consideration when calculating the axial pitch PX for a Gear 22.
The axial pitch, or lead angle, of a worm gear determines how effective it is. The higher the lead angle, the less efficient the gear. Lead angles are directly related to the worm gear’s load capacity. In particular, the angle of the lead is proportional to the length of the stress area on the worm wheel teeth. A worm gear’s load capacity is directly proportional to the amount of root bending stress introduced by cantilever action. A worm with a lead angle of g is almost identical to a helical gear with a helix angle of 90 deg.
In the present invention, an improved method of manufacturing worm shafts is described. The method entails determining the desired axial pitch PX for each reduction ratio and frame size. The axial pitch is established by a method of manufacturing a worm shaft that has a thread that corresponds to the desired gear ratio. A gear is a rotating assembly of parts that are made up of teeth and a worm.
In addition to the axial pitch, a worm gear’s shaft can also be made from different materials. The material used for the gear’s worms is an important consideration in its selection. Worm gears are usually made of steel, which is stronger and corrosion-resistant than other materials. They also require lubrication and may have ground teeth to reduce friction. In addition, worm gears are often quieter than other gears.

Gear 22’s tooth parameters

A study of Gear 22’s tooth parameters revealed that the worm shaft’s deflection depends on various factors. The parameters of the worm gear were varied to account for the worm gear size, pressure angle, and size factor. In addition, the number of worm threads was changed. These parameters are varied based on the ISO/TS 14521 reference gear. This study validates the developed numerical calculation model using experimental results from Lutz and FEM calculations of worm gear shafts.
Using the results from the Lutz test, we can obtain the deflection of the worm shaft using the calculation method of ISO/TS 14521 and DIN 3996. The calculation of the bending diameter of a worm shaft according to the formulas given in AGMA 6022 and DIN 3996 show a good correlation with test results. However, the calculation of the worm shaft using the root diameter of the worm uses a different parameter to calculate the equivalent bending diameter.
The bending stiffness of a worm shaft is calculated through a finite element model (FEM). Using a FEM simulation, the deflection of a worm shaft can be calculated from its toothing parameters. The deflection can be considered for a complete gearbox system as stiffness of the worm toothing is considered. And finally, based on this study, a correction factor is developed.
For an ideal worm gear, the number of thread starts is proportional to the size of the worm. The worm’s diameter and toothing factor are calculated from Equation 9, which is a formula for the worm gear’s root inertia. The distance between the main axes and the worm shaft is determined by Equation 14.

Gear 22’s deflection

To study the effect of toothing parameters on the deflection of a worm shaft, we used a finite element method. The parameters considered are tooth height, pressure angle, size factor, and number of worm threads. Each of these parameters has a different influence on worm shaft bending. Table 1 shows the parameter variations for a reference gear (Gear 22) and a different toothing model. The worm gear size and number of threads determine the deflection of the worm shaft.
The calculation method of ISO/TS 14521 is based on the boundary conditions of the Lutz test setup. This method calculates the deflection of the worm shaft using the finite element method. The experimentally measured shafts were compared to the simulation results. The test results and the correction factor were compared to verify that the calculated deflection is comparable to the measured deflection.
The FEM analysis indicates the effect of tooth parameters on worm shaft bending. Gear 22’s deflection on Worm Shaft can be explained by the ratio of tooth force to mass. The ratio of worm tooth force to mass determines the torque. The ratio between the two parameters is the rotational speed. The ratio of worm gear tooth forces to worm shaft mass determines the deflection of worm gears. The deflection of a worm gear has an impact on worm shaft bending capacity, efficiency, and NVH. The continuous development of power density has been achieved through advancements in bronze materials, lubricants, and manufacturing quality.
The main axes of moment of inertia are indicated with the letters A-N. The three-dimensional graphs are identical for the seven-threaded and one-threaded worms. The diagrams also show the axial profiles of each gear. In addition, the main axes of moment of inertia are indicated by a white cross.