Trapezoid Screw Jacks JWM Series for Lifting Equipment
Trapezoidal screw jacks(also named acme screw jacks or self-locking screw jacks) having high gear ratios and standard design are generally self-locking. They will hold loads without back driving in the absence of vibrations. JWM series trapezoid screw jacks are suitable for low speed and low frequency. A trapezoidal screw jack is an essential jack-up part that accomplishes the functions such as lifting, dropping, pushing, and inverting through worm gear drives screw. Compact configuration, small size, lightweight, convenient installation, flexible operation, high reliability and stability, a long service life, more connection form, etc.
Trapezoid Screw Jacks JWM Series for Lifting Equipment
Trapezoidal screw jacks(also named acme screw jacks or self-locking screw jacks) having high gear ratios and standard design are generally self-locking. They will hold loads without back driving in the absence of vibrations. JWM series trapezoid screw jacks are suitable for low speed and low frequency. A trapezoidal screw jack is an essential jack-up part that accomplishes the functions such as lifting, dropping, pushing, and inverting through worm gear drives screw. Compact configuration, small size, lightweight, convenient installation, flexible operation, high reliability and stability, a long service life, more connection form, etc.
The JWM series electrical motors, alternating or direct currents, and hydraulic or pneumatic motors can drive trapezoidal screw jacks. Also, they can be driven manually or with any other type of transmission.
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JWM Series Trapezoid Screw Jacks Specifications Parameter:
JWM Series Trapezoid Screw Jack Dimensions Drawing:
1. JWM010 Series Trapezoid Screw Jacks
2. JWM025 Series Trapezoid Screw Jacks
3. JWM050 Series Trapezoid Screw Jacks
4. JWM100 Series Trapezoid Screw Jacks
5. JWM150 Series Trapezoid Screw Jacks
6. JWM200 Series Trapezoid Screw Jacks
7. JWM300 Series Trapezoid Screw Jacks
8. JWM750 Series Trapezoid Screw Jacks
Structure of JWM Series Trapezoidal Screw Jack:
| Screw shaft end | Select from a wide variety of fitting configurations. |
| High precision, large screw shaft | This series uses a trapezoidal screw. |
| Ideal bearing structure | This series uses a tapered roller bearing that is durable against both thrust and radial loads. |
| High-precision worm wheel | This series uses a unique aluminum bronze material machined with high precision and offers ample strength. |
| Large input shaft | This series offers ample strength for the use of multiple connected jacks. |
| Screw shaft guide | A screw guide is provided on the output shaft cover of the worm wheel to minimize the drift of the screw. |
| Grease lubrication | Grease lubrication offers easy maintenance. |
| Lightweight housing | The housing is manufactured from diecast aluminum and is both lightweight and compact. |
| High-efficiency reduction | This design offers the benefits of many years of experience with Worm Speed Reducer. |
JWM Series Trapezoid Screw Jacks Features:
JWM screw jacks are trapezoidal screw jacks; the trapezoid screw pairs have high precision and high worm-gear pairs.
1. Model: JWM010, JWM025, JWM050, JWM100, JWM150, JWM200, JWM300, JWM500, JWM750, JWM1000.
2. Journey: 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000mm.
3. It is suitable for low-speed and low frequency
4. Main components: Precision trapezoid screw pair and high precision worm-gears pair
5. Compact design, easy operation, convenient maintenance
6. It is suitable for heavy load, low speed, low service frequency
7. Trapezoid screw has a self-lock function; it can hold up the load without breaking the device when the screw stops traveling.
8. Accessory parts: Motor, hand wheel, rubber bellows, steel cover, frequency inverter, and brake.
9. Application: Metallurgy, construction, irrigation, chemical industry, healthcare, etc.
Application of Trapezoidal Screw Jack
Trapezoid screw jacks are widely used in many industries, such as chemical, medical, cultural, health, etc. And from the various parts of the device, it can be learned that such devices features in many aspects. In order to have a better understanding of the device, people are supposed to have a more comprehensive knowledge of them.
Trapezoidal Screw of Screw Jack Processing Requirements
What are the processing requirements for the trapezoidal screw of the screw jack: the screw jack is composed of a worm wheel and a worm. There are threads inside the worm gear, which can cooperate with trapezoidal screws or ball screws. This mechanism is self-locking and can drive heavy objects with a small force. At the same time, this mechanism converts rotary motion into linear motion, so the staggered angle of the worm gear is usually 90°. In this mechanism, the worm is generally used as the active part, while the worm wheel is used as the driven part. To achieve the action of the screw rod rising and falling.
The screw part of the screw jack is also an essential part, and in the elevator, because it meshes with the nut to realize the transmission movement, its processing requirements are very high. Today we will talk about the processing requirements of the trapezoidal screw.
1. When processing or assembling, the knurling knife should move quickly in the groove without too much gap. Because if the gap is too large, the hob will tilt during operation, and the rolled-out screw will have uneven threads, which will affect the accuracy, and at the same time, the service life cannot be guaranteed.
2. When the screw is on the lathe, it is necessary to open the lathe first, start it, let the workpiece rotate, and then tighten the screw to prevent the workpiece from slipping.
3. When the lathe is running, do not cool the hob to prevent damage to the alloy knife.
4. The choice of material is also critical. If low-quality round steel is used, the wear of the hob will increase, and the accuracy of the screw is not guaranteed.
5. Regularly check the knife groove. If you have any questions about model selection, please get in touch with our technical engineers, who will give you accurate answers.
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Customized Trapezoid Screw Jacks
We are the factory with the ability to customize the trapezoid screw jacks to your specific requirements for your application. Please share detailed information including your use scenario, required loading capacity, reduction ratio, power source, stroke length, and other requests. Our sales and technical team will provide solutions and drawings for your confirmation.
Trapezoid Screw Jacks Model Selection Guide:
- Step 1: select the corresponding model according to your load capacity requirements,
- Step 2: confirm the reduction ratio: 1/6, 1/12, or 1/24. If you need a special speed ratio, please contact our sales team.
- Step 3: Determine the head form of the screw, there are cylinder type, nut type, flange type, thread type, and flat head type for your option.
- Step 4: confirm the screw length or stroke you need. The default stroke is 500mm, and the screw length can be customized according to different needs.
- Step 5: confirm the accessories you need, such as matching motors, hand wheels, protection tubes for screws, dust cover, anti-rotation functions, nuts, etc.
Contact us now to get your customized trapezoid screw jacks.
Professional Trapezoid Screw Jack Manufacturer
With over 30 years of professional manufacturing experience, our specialized workers always produce trapezoid screw jacks with refined craftsmanship and consistent quality. Whether working on large volume orders or simply 1 set, our standardized production process makes sure you get the same level of high-quality trapezoid screw jacks at a short lead time.
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- Well-trained Staffs
- Extensive Manufacturing experience
- Fully-equipped Production Workshop
- Well-established manufacturing standard
FAQ
Q: What is the difference between a trapezoidal worm gear screw jack and a ball screw jack?
A: The trapezoidal screw jack uses a threaded acme screw that is typically self-locking, meaning it will hold its position without a brake. Ball screw jacks incorporate ball screws to convert rotary motion to linear movement. Ball screw jacks are inherently more efficient, requiring 1/3 horsepower compared to trapezoidal worm gear jacks.
Q: What is a Translating or Keyed-Type Screw Jack?
A: This type of jack has a key fixed to the jack housing and inserted into a keyway milled into the lifting screw which forces the screw to translate through the gearbox housing without rotating.
Q: What is a Rotating or Traveling Nut-Type Screw Jack?
A: This design incorporates a lifting screw keyed to the worm gear as a single unit, forcing the lifting screw to rotate in the gearbox, but not translate. A traveling nut, running on the rotating screw generates linear motion for the attached load. This type of jack is ideal for applications that cannot accommodate a screw protection tube.
Q: operated in multiple unit systems:
A: Yes, easily configured in systems, motorized and manual, to raise and lower a load in unison.
Q: Can a worm gear screw jack be operated at high speed?
A: Input power should not exceed the KW rating in specification tables. Maximum gearbox speed should not exceed 1,800 rpm.
Packing Shipping Delivery
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How to choose power transmissions parts and industrial products which meet our requirement
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| Conveyor Chains | V-Belts | Worm Gearbox | Helical Gear | Worm |
| Agricultural Chain | CNC Proces Parts | Casting | Stamping | |
| Powder Metallurgy | CNC Proces Parts | Casting | Stamping |
What Products Do you sell ?
We are a group of factories, give customer one stop solution of power transmission and industrial products. We are in the position to supply wide range of products, including chains, sprockets, v-belt and v-belt pulleys, timing belt and timing belt pulleys, gears, speed reducers, motors, racks, couplings, and many other parts, like locking assembly, taper bushing, Chain guide, shaft collar, torque limiter, cam clutch, universal joint, motor base and motor slide, rod end, clevis, rubber mount, etc. We make special parts according to drawings and/or samples.
How to choose a gearbox which meets our requirement?
You can refer to our catalogue to choose the gearbox or we can help to choose when you provide
the technical information of required output torque, output speed and motor parameter etc.
What information shall we give before placing a purchase order?
a) Type of the gearbox, ratio, input and output type, input flange, mounting position, and motor informationetc.
b) Housing color.
c) Purchase quantity.
d) Other special requirements.
What industries are your gearboxes being used?
Our gearboxes are widely used in the areas of textile, food processing, beverage, chemical industry,
escalator,automatic storage equipment, metallurgy, tabacco, environmental protection, logistics and etc.
What is the producing process?
Production process including raw material cutting, machine processing, grinding, accessories cleaning, assemble, cleaning, stoving, oil coating, cover pressing, testing, package.
How to control the products quality?
Combining advanced equipment and strict management, we provide high standard and quality bearings for our customers all over the world.
What is the transportation?
-If small quantity , we Suggest to send by express, such as DHL,UPS, TNT FEDEX. If large amount, by air or sea shipping.
Can we design packaging?
-Yes. Default is regular packing, and we can make customer's own packing.
Can you provide OEM service?
-Yes, we work on OEM orders. Which means size, quantity, design, packing solution, etc will depend on your requests; and your logo will be customized on our products.
Can you give me discount on Power Transmissions Parts and Industrial parts?
-Yes, of course. Pls. send me your Email, you'll get more
Q: Are You a trading company or a manufacturer?
A: We Are the factory and have our Own trading company
Q: How Can I get an offer?
A: please send US quotation information: drawings, materials, weight, quantity and requirements, we can accept PDF, ISGS, DWG, STEP file format. If you don't have the drawings, please send us the samples, we can also quote you according to your samples.
Q: What is your minimum order size?
A: it is usually 100 pieces, but a low quantity is acceptable under some special circumstances.
Q: Do you provide samples? Is it free or extra?
A: Yes, we can provide samples free of charge, but we don't pay the freight.
Q: What is the lead time for mass production?
A: honestly, it depends on the number of orders. Normally, if you don't need the tools, deposit them after 30 days or so.
Q: What if the parts don't Work?
A: we can guarantee the quality, but if it happens, please contact us immediately, take some photos, we will check the problem and solve it as soon as possible.
Q: What are your terms of payment?
A: payment is less than US $1000,100% in advance. Payment: $1000,50% wire transfer in advance, balance before shipment,Other Terms of payment are negotiable
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