FeaturesBest hand operated lead screw jack,Low cost Manual lifting jacks screw jacks with handwheel The 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, 31 Advance CZPT Fenjin Marine Gearbox 120C 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, Pull Line geaxbox Motor Gearbox Pull Back Car Spare Part Toy Accessories Toy Car Gearbox 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, CZPT Auto Spare Parts Car Transmission Front Complete Drive Shafts 43410-0E040 for LEXUS RX (_L1_) Front Axle Right 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, Original Case excavator accessories parts DRIVE SHAFT Travel reducer LB013570 for SUMITOMO SH350-5 except the human damage.

What Is a Worm Gear Reducer?

If you have never seen a worm gear reducer before, you’re missing out! Learn more about these incredible gears and their applications by reading this article! In addition to worm gear reducers, learn about worms and how they’re made. You’ll also discover what types of machines can benefit from worm gears, such as rock crushers and elevators. The following information will help you understand what a worm gear reducer is and how to find one in your area.

Typical worm shaft

A typical worm has two shafts, one for advancing and one for receding, which form the axial pitch of the gear. Usually, there are eight standard axial pitches, which establish a basic dimension for worm production and inspection. The axial pitch of the worm equals the circular pitch of the gear in the central plane and the master lead cam’s radial pitch. A single set of change gears and one master lead cam are used to produce each size of worm.
Worm gear is commonly used to manufacture a worm shaft. It is a reliable and efficient gear reduction system that does not move when the power is removed. Typical worm gears come in standard sizes as well as assisted systems. Manufacturers can be found online. Listed below are some common materials for worm gears. There are also many options for lubrication. The worm gear is typically made from case hardened steel or bronze. Non-metallic materials are also used in light-duty applications.
A self-locking worm gear prevents the worm from moving backwards. Typical worm gears are generally self-locking when the lead angle is less than 11 degrees. However, this feature can be detrimental to systems that require reverse sensitivity. If the lead angle is less than four degrees, back-driving is unlikely. However, if fail-safe protection is a prerequisite, back-driving worm gears must have a positive brake to avoid reverse movement.
Worm gears are often used in transmission applications. They are a more efficient way to reduce the speed of a machine compared to conventional gear sets. Their reduced speed is possible thanks to their low ratio and few components. Unlike conventional gear sets, worm gears require less maintenance and lower mechanical failure than a conventional gear set. While they require fewer parts, worm gears are also more durable than conventional gear sets.
There are two types of worm tooth forms. Convex and involute helicoids have different types of teeth. The former uses a straight line to intersect the involute worm generating line. The latter, on the other hand, uses a trapezoid based on the central cross section of the root. Both of these tooth forms are used in the production of worms. And they have various variations in pitch diameter.

Types of worms

Worms have several forms of tooth. For convenience in production, a trapezoid-based tooth form is used. Other forms include an involute helicoidal or a convolute worm generating a line. The following is a description of each type. All types are similar, and some may be preferred over others. Listed below are the three most common worm shaft types. Each type has its own advantages and disadvantages.
Discrete versus parallel axis: The design of a worm gear determines its ratio of torque. It’s a combination of two different metals – one for the worm and one for the wheel – which helps it absorb shock loads. Construction equipment and off-road vehicles typically require varying torques to maneuver over different terrain. A worm gear system can help them maneuver over uneven terrain without causing excessive wear.
Worm gear units have the highest ratio. The sliding action of the worm shaft results in a high self-locking torque. Depending on the angle of inclination and friction, a worm gear can reach up to 100:1! Worm gears can be made of different materials depending on their inclination and friction angle. Worm gears are also useful for gear reduction applications, such as lubrication or grinding. However, you should consider that heavier gears tend to be harder to reverse than lighter ones.
Metal alloy: Stainless steel, brass, and aluminum bronze are common materials for worm gears. All three types have unique advantages. A bronze worm gear is typically composed of a combination of copper, zinc, and tin. A bronze shaft is more corrosive than a brass one, but it is a durable and corrosion-resistant option. Metal alloys: These materials are used for both the worm wheel.
The efficiency of worm gears depends on the assembly conditions and the lubricant. A 30:1 ratio reduces the efficiency to 81:1%. A worm gear is more efficient at higher ratios than an helical gear, but a 30:1 ratio reduces the efficiency to 81%. A helical gear reduces speed while preserving torque to around 15% of the original speed. The difference in efficiency between worm gear and helical gear is about half an hour!

Methods of manufacturing worm shafts

Several methods of manufacturing worm shafts are available in the market. Single-pointed lathe tools or end mills are the most popular methods for manufacturing worms. These tools are capable of producing worms with different pressure angles depending on their diameter, the depth of thread, and the grinding wheel’s diameter. The diagram below shows how different pressure angles influence the profile of worms manufactured using different cutting tools.
The method for making worm shafts involves the process of establishing the proper outer diameter of a common worm shaft blank. This may include considering the number of reduction ratios in a family, the distance between the worm shaft and the gear set center, as well as the torques involved. These processes are also referred to as ‘thread assembly’. Each process can be further refined if the desired axial pitch can be achieved.
The axial pitch of a worm must match the circular pitch of the larger gear. This is called the pitch. The pitch diameter and axial pitch must be equal. Worms can be left-handed or right-handed. The lead, which refers to the distance a point on the thread travels during one revolution of the worm, is defined by its angle of tangent to the helix on the pitch of the cylinder.
Worm shafts are commonly manufactured using a worm gear. Worm gears can be used in different applications because they offer fine adjustment and high gear reduction. They can be made in both standard sizes and assisted systems. Worm shaft manufacturers can be found online. Alternatively, you can contact a manufacturer directly to get your worm gears manufactured. The process will take only a few minutes. If you are looking for a manufacturer of worm gears, you can browse a directory.
Worm gears are made with hardened metal. The worm wheel and gear are yellow in color. A compounded oil with rust and oxidation inhibitors is also used to make worm gears. These oils adhere to the shaft walls and make a protective barrier between the surfaces. If the compounded oil is applied correctly, the worm gear will reduce the noise in a motor, resulting in a smoother performance.

applications for worm gear reducers

Worm gears are widely used in power transmission applications, providing a compact, high reduction, low-speed drive. To determine the torque ratio of worm gears, a numerical model was developed that makes use of the equation of displacement compatibility and the influence coefficient method, which provides fast computing. The numerical model also incorporates bending deflections of the gear surfaces and the mating surfaces. It is based on the Boussinesq theory, which calculates local contact deformations.
Worm gears can be designed to be right or left-handed, and the worm can turn either clockwise or counter-clockwise. An internal helical gear requires the same hand to operate both parts. In contrast, an external helical gear must be operated by the opposite hand. The same principle applies to worm gears in other applications. The torque and power transferred can be large, but worm gears are able to cope with large reductions in both directions.
Worm gears are extremely useful in industrial machinery designs. They reduce noise levels, save space, and give machines extra precision and fast-stopping capabilities. Worm gears are also available in compact versions, making them ideal for hoisting applications. This type of gear reducer is used in industrial settings where space is an issue. Its smaller size and less noise makes it ideal for applications that need the machine to stop quickly.
A double-throated worm gear offers the highest load capacity while still remaining compact. The double-throated version features concave teeth on both worm and gear, doubling the contact area between them. Worm gears are also useful for low to moderate-horsepower applications, and their high ratios, high output torque, and significant speed reduction make them a desirable choice for many applications. Worm gears are also quieter than other types of gears, reducing the noise and vibrations that they cause.
Worm gears have numerous advantages over other types of gears. They have high levels of conformity and can be classified as a screw pair within a lower-pair gear family. Worm gears are also known to have a high degree of relative sliding. Worm gears are often made of hardened steel or phosphor-bronze, which provides good surface finish and rigid positioning. Worm gears are lubricated with special lubricants that contain surface-active additives. Worm gear lubrication is a mixed lubrication process and causes mild wear and tear.