Screw Jacks

Function:
Screw jack is a basis jack-up part, accomplanish the fuctions such as
lifting, drop, push and inverting through worm gear drives screw.
Advantages:
-Self-locking ability
-Can be driven directly by motor or other power or manual
-Can be customized according user’s demand
-Compact configuration, small size, lightweight
-Convenient installation, flexible operation
-High reliability and stability
-Long service life
-More connection form etc.
Application Industry:
Screw jak is applied to all fields for lifting or pulling, such as
Aircraft maintenance platform, Solar plate, machinery, metallurgy,
water conservancy, medical treatment, chemical industry, culture and
hygienist etc.
Images & synchronize gear ring gearboxes parts OEM33368-35030 Parts Name

How to choose a suitable model? Some parameters need to clear when choose a screw jack, pls clear us the below to offer you the best products and service.

1. The lift capacity ? (It means how many Kilos or KN the screw jack need to lift? Such as 5Kn)
The screw’s travel stroke? (It means the screw’s travel distance, such as 400mm)
The ratio? (It means how much time the screw takes to finish the travel stroke, such as I want to use 10 seconds to finish the 400mm stroke)

2.Translating screw or translating nut ?
(Translating nut has a much higher precision than translating screw and it can save space. )

3. Pull or lift (below in picture Upright or Inverted )

4.Which of the screw top you need?

5.Manual type(hand wheel operated) or electric motor driver type?
If electric motor driver type you should tell me the flange size of your electric motor for us to match the suitable screw jack’s flange, if your motor has no flange we can send you an coupling to linkage the motor and the screw jack.

Screw jacks quantity above 2 sets pls see the below linkage scheme, generally we will make a CAD drawing for you to check the feasibility.

Application Example:

Packaging & ShippingPackaging:
1. Commerial Packaging: PE bags,PP bags,Bubble bags,Carton box then the outest is plyooden box, safe package.
2. Or according to clients’ requirements.
Shipping:
1. Express Delivery: DHL,TNT, China made air compressor drive shaft rubber flexible disc coupling flexible coupling-flexible coupling manufacturer29571T UPS,Fedex,EMS,ARAMEX,2-4 working days to arrive if smooth, this way charge is high but transportation time is the shortest.
2. By Air, this way need about 7 days about, the transportation need time is also very short, but the transport charge is still a little big high.
3. By Sea/Railway, this is the most common ways when going international trade, from port to port, the cost is low, but maybe need a little more time, say 20-40 days between worldwide ports.
Delivery:
1. Standard Items: 7-15 working days.
2. Nonstandard Items: 15-25 working days.
3. Actual delivery time vary depends on different products and different quantity.

Payment:
We accept T/T, Paypal, Rubber And ceramic pulley lagging For Conveyor Belt Pulleys L/C, Escrow, Alibaba Trade Assurance etc.
Note: Payment terms are different depends on different total amount,different countries and regions

FAQQ1. Can i get 1 or more samples?
A: Yes,Sample orders welcomed. Low amount free samples could be provided when we have stocks.
Q2. How about the quality of your product?
A: Passed ISO9001:2008 quality authentication. Q3. OEM/ODM accepted?
A: 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.
Q4. If you can not find the product on our website,how do you do?
A: Please send us inquiry with product pictures and drawings by email or other ways you prefer, we’ll check if we could produce.
Q5. Can I trust you?
A: Absolutely yes. Samples could be provided to test firstly, we’re also alibaba trade assurance golden supplier.
Company Information
Why choosing us?

(1) We have first-class testing equipment to detect bearing various data parameters and control the quality of the bearing.

Whenever bearings must first detected whether the quality is qualified and the unqualified bearing will be eliminated directly.

So we can get the trust of a large customer, and supply them for several years.
(2) We have our own R & D capabilities, to help customers solve the problem of non-standard bearings.

We can also according to customer requirements change their own mark.
(3) price, our manufacture ensure that our prices across China are quite competitive.

Looking Forward To Hearing From You, We Will Reply You Within 2 Hours! Sleeve Bushing Taper Lock Bush QD type JA, SH, SDS, SD, SK

What Are Worm Gears and Worm Shafts?

If you’re looking for a fishing reel with a worm gear system, you’ve probably come across the term ‘worm gear’. But what are worm gears and worm shafts? And what are the advantages and disadvantages of worm gears? Let’s take a closer look! Read on to learn more about worm gears and shafts! Then you’ll be well on your way to purchasing a reel with a worm gear system.

worm gear reducers

Worm shaft reducers have a number of advantages over conventional gear reduction mechanisms. First, they’re highly efficient. While single stage worm reducers have a maximum reduction ratio of about five to sixty, hypoid gears can typically go up to a maximum of one hundred and twenty times. A worm shaft reducer is only as efficient as the gearing it utilizes. This article will discuss some of the advantages of using a hypoid gear set, and how it can benefit your business.
To assemble a worm shaft reducer, first remove the flange from the motor. Then, remove the output bearing carrier and output gear assembly. Lastly, install the intermediate worm assembly through the bore opposite to the attachment housing. Once installed, you should carefully remove the bearing carrier and the gear assembly from the motor. Don’t forget to remove the oil seal from the housing and motor flange. During this process, you must use a small hammer to tap around the face of the plug near the outside diameter of the housing.
Worm gears are often used in reversing prevention systems. The backlash of a worm gear can increase with wear. However, a duplex worm gear was designed to address this problem. This type of gear requires a smaller backlash but is still highly precise. It uses different leads for the opposing tooth face, which continuously alters its tooth thickness. Worm gears can also be adjusted axially.

worm gears

There are a couple of different types of lubricants that are used in worm gears. The first, polyalkylene glycols, are used in cases where high temperature is not a concern. This type of lubricant does not contain any waxes, which makes it an excellent choice in low-temperature applications. However, these lubricants are not compatible with mineral oils or some types of paints and seals. Worm gears typically feature a steel worm and a brass wheel. The brass wheel is much easier to remodel than steel and is generally modeled as a sacrificial component.
The worm gear is most effective when it is used in small and compact applications. Worm gears can greatly increase torque or reduce speed, and they are often used where space is an issue. Worm gears are among the smoothest and quietest gear systems on the market, and their meshing effectiveness is excellent. However, the worm gear requires high-quality manufacturing to perform at its highest levels. If you’re considering a worm gear for a project, it’s important to make sure that you find a manufacturer with a long and high quality reputation.
The pitch diameters of both worm and pinion gears must match. The two worm cylinders in a worm wheel have the same pitch diameter. The worm wheel shaft has two pitch cylinders and two threads. They are similar in pitch diameter, but have different advancing angles. A self-locking worm gear, also known as a wormwheel, is usually self-locking. Moreover, self-locking worm gears are easy to install.

worm shafts

The deflection of worm shafts varies with toothing parameters. In addition to toothing length, worm gear size and pressure angle, worm gear size and number of helical threads are all influencing factors. These variations are modeled in the standard ISO/TS 14521 reference gear. This table shows the variations in each parameter. The ID indicates the worm shaft’s center distance. In addition, a new calculation method is presented for determining the equivalent bending diameter of the worm.
The deflection of worm shafts is investigated using a four-stage process. First, the finite element method is used to compute the deflection of a worm shaft. Then, the worm shaft is experimentally tested, comparing the results with the corresponding simulations. The final stage of the simulation is to consider the toothing geometry of 15 different worm gear toothings. The results of this step confirm the modeled results.
The lead on the right and left tooth surfaces of worms is the same. However, the lead can be varied along the worm shaft. This is called dual lead worm gear, and is used to eliminate play in the main worm gear of hobbing machines. The pitch diameters of worm modules are equal. The same principle applies to their pitch diameters. Generally, the lead angle increases as the number of threads decreases. Hence, the larger the lead angle, the less self-locking it becomes.

worm gears in fishing reels

Fishing reels usually include worm shafts as a part of the construction. Worm shafts in fishing reels allow for uniform worm winding. The worm shaft is attached to a bearing on the rear wall of the reel unit through a hole. The worm shaft’s front end is supported by a concave hole in the front of the reel unit. A conventional fishing reel may also have a worm shaft attached to the sidewall.
The gear support portion 29 supports the rear end of the pinion gear 12. It is a thick rib that protrudes from the lid portion 2 b. It is mounted on a bushing 14 b, which has a through hole through which the worm shaft 20 passes. This worm gear supports the worm. There are two types of worm gears available for fishing reels. The two types of worm gears may have different number of teeth or they may be the same.
Typical worm shafts are made of stainless steel. Stainless steel worm shafts are especially corrosion-resistant and durable. Worm shafts are used on spinning reels, spin-casting reels, and in many electrical tools. A worm shaft can be reversible, but it is not entirely reliable. There are numerous benefits of worm shafts in fishing reels. These fishing reels also feature a line winder or level winder.

worm gears in electrical tools

Worms have different tooth shapes that can help increase the load carrying capacity of a worm gear. Different tooth shapes can be used with circular or secondary curve cross sections. The pitch point of the cross section is the boundary for this type of mesh. The mesh can be either positive or negative depending on the desired torque. Worm teeth can also be inspected by measuring them over pins. In many cases, the lead thickness of a worm can be adjusted using a gear tooth caliper.
The worm shaft is fixed to the lower case section 8 via a rubber bush 13. The worm wheel 3 is attached to the joint shaft 12. The worm 2 is coaxially attached to the shaft end section 12a. This joint shaft connects to a swing arm and rotates the worm wheel 3.
The backlash of a worm gear may be increased if the worm is not mounted properly. To fix the problem, manufacturers have developed duplex worm gears, which are suitable for small backlash applications. Duplex worm gears utilize different leads on each tooth face for continuous change in tooth thickness. In this way, the center distance of the worm gear can be adjusted without changing the worm’s design.

worm gears in engines

Using worm shafts in engines has a few benefits. First of all, worm gears are quiet. The gear and worm face move in opposite directions so the energy transferred is linear. Worm gears are popular in applications where torque is important, such as elevators and lifts. Worm gears also have the advantage of being made from soft materials, making them easy to lubricate and to use in applications where noise is a concern.
Lubricants are necessary for worm gears. The viscosity of lubricants determines whether the worm is able to touch the gear or wheel. Common lubricants are ISO 680 and 460, but higher viscosity oil is not uncommon. It is essential to use the right lubricants for worm gears, since they cannot be lubricated indefinitely.
Worm gears are not recommended for engines due to their limited performance. The worm gear’s spiral motion causes a significant reduction in space, but this requires a high amount of lubrication. Worm gears are susceptible to breaking down because of the stress placed on them. Moreover, their limited speed can cause significant damage to the gearbox, so careful maintenance is essential. To make sure worm gears remain in top condition, you should inspect and clean them regularly.

Methods for manufacturing worm shafts

A novel approach to manufacturing worm shafts and gearboxes is provided by the methods of the present invention. Aspects of the technique involve manufacturing the worm shaft from a common worm shaft blank having a defined outer diameter and axial pitch. The worm shaft blank is then adapted to the desired gear ratio, resulting in a gearbox family with multiple gear ratios. The preferred method for manufacturing worm shafts and gearboxes is outlined below.
A worm shaft assembly process may involve establishing an axial pitch for a given frame size and reduction ratio. A single worm shaft blank typically has an outer diameter of 100 millimeters, which is the measurement of the worm gear set’s center distance. Upon completion of the assembly process, the worm shaft has the desired axial pitch. Methods for manufacturing worm shafts include the following:
For the design of the worm gear, a high degree of conformity is required. Worm gears are classified as a screw pair in the lower pairs. Worm gears have high relative sliding, which is advantageous when comparing them to other types of gears. Worm gears require good surface finish and rigid positioning. Worm gear lubrication usually comprises surface active additives such as silica or phosphor-bronze. Worm gear lubricants are often mixed. The lubricant film that forms on the gear teeth has little impact on wear and is generally a good lubricant.