China Hot selling Swl Worm Screw Jack for Lifting with Great quality

Merchandise Description


Product Description

1, The gear is created of high-toughness low-carbon alloy metal by carburizing and quenching. The hardness of

the tooth surface is up to HRC58-62. The gears are groun d grinding technological innovation with higher precision and
good contact.
2, Large transmission efficiency: one phase is higher than ninety six.5%, double stage is higher than ninety three%, 3rd
stage is greater than ninety%.
3, Sleek procedure and minimal sound.
4, Modest size, light-weight weight, prolonged support daily life and substantial carrying capability.
5, Straightforward to disassemble and simple to install.

Expressed Strategy Of Model


Solution Parameters



How to Select a Screw Jack? Some inquiries you want response pls.

Q1: The potential is to load ? KG (it indicates how a lot of Kg or Tons the screw jack need to carry or drop?)

The stroke is ? mm (it indicates the screw shaft length, this sort of as 500mm)

The lifting velocity is ? mm/second (it indicates how a lot time you want to use to end the stroke?
These kinds of as I want to use twenty seconds to end the 500mm stroke then can arrive out the pace is 25mm/s )

Screw jack SWL2.5-a hundred and twenty efficiency parameters table as the beneath:
Q2: Which the screw prime you require? Solution: I need (A B C D E F).
Q3: Handbook sort (Hand wheel pushed) or electrical motor driven variety? Reply: I need to have type.
This fall: Screw movement (screw travelling up and down when functioning) or Nut motion (the nut travelling up
and down when functioning)? Upright or Inverted? Solution: I require (A B E F)

Our Rewards



Packaging & Delivery


Company Profile

Xihu (West Lake) Transmission Equipment Co., Ltd. found HangZhou city, ZHangZhoug, as 1 skilled
producer and exporter of cycloidal pin wheel reducer,worm reducer, equipment reducer, gearbox ,
AC motor and relative spare components, owns prosperous knowledge in this line for many a long time.

We are 1 direct manufacturing facility, with sophisticated generation products, the sturdy advancement team and
making capacity to provide top quality goods for consumers.

Our merchandise broadly served to a variety of industries of Metallurgy, Chemicals, textile,medicine,wood
and many others. Principal marketplaces: China, Africa,Australia,Vietnam, Turkey,Japan, Korea, Philippines…

Welcome to request us any concerns, excellent offer you often for you for long expression organization.


Q: Are you investing company or manufacturer?
A: We are factory.

Q: How extended is your supply time?
A: Generally it is 5-10 times if the merchandise are in stock. or it is 15-twenty days if the products are not in stock.

Q: Can we purchase 1 laptop of each merchandise for top quality screening?
A: Yes, we are glad to acknowledge trial get for quality screening.

Q:How to pick a gearbox which fulfills your need?
A:You can refer to our catalogue to select the gearbox or we can help to decide on when you offer
the technical details of essential output torque, output speed and motor parameter and so on.

Q: What information shall we give ahead of positioning a obtain get?
A:a) Variety of the gearbox, ratio, enter and output sort, enter flange, mounting position, and motor informationetc.
b) Housing coloration.
c) Purchase amount.
d) Other specific specifications.

Worm Shafts and Gearboxes

If you have a gearbox, you may possibly be pondering what the ideal Worm Shaft is for your application. There are a number of things to contemplate, which includes the Concave form, Variety of threads, and Lubrication. This write-up will make clear each factor and aid you choose the correct Worm Shaft for your gearbox. There are several options obtainable on the marketplace, so don’t be reluctant to store all around. If you are new to the planet of gearboxes, read on to learn much more about this popular type of gearbox.
worm shaft

Concave form

The geometry of a worm gear varies considerably based on its manufacturer and its meant use. Early worms experienced a basic profile that resembled a screw thread and could be chased on a lathe. Afterwards, equipment with a straight sided g-angle were developed to produce threads that had been parallel to the worm’s axis. Grinding was also created to improve the finish of worm threads and lessen distortions that take place with hardening.
To choose a worm with the correct geometry, the diameter of the worm gear need to be in the exact same device as the worm’s shaft. As soon as the basic profile of the worm equipment is determined, the worm equipment teeth can be specified. The calculation also requires an angle for the worm shaft to stop it from overheating. The angle of the worm shaft ought to be as shut to the vertical axis as attainable.
Double-enveloping worm gears, on the other hand, do not have a throat about the worm. They are helical gears with a straight worm shaft. Given that the enamel of the worm are in get in touch with with each other, they generate significant friction. Unlike double-enveloping worm gears, non-throated worm gears are a lot more compact and can handle smaller hundreds. They are also simple to manufacture.
The worm gears of various manufacturers offer many advantages. For occasion, worm gears are a single of the most effective methods to enhance torque, while reduce-top quality components like bronze are difficult to lubricate. Worm gears also have a low failure charge simply because they let for significant leeway in the design process. In spite of the distinctions between the two expectations, the general overall performance of a worm equipment program is the exact same.
The cone-shaped worm is an additional kind. This is a technological scheme that brings together a straight worm shaft with a concave arc. The concave arc is also a helpful utility design. Worms with this form have a lot more than 3 contacts at the exact same time, which implies they can minimize a huge diameter with no excessive wear. It is also a relatively lower-expense product.
worm shaft

Thread sample

A excellent worm equipment needs a best thread sample. There are a couple of essential parameters that figure out how good a thread sample is. To start with, the threading pattern need to be ACME-threaded. If this is not achievable, the thread should be manufactured with straight sides. Then, the linear pitch of the “worm” must be the exact same as the circular pitch of the corresponding worm wheel. In straightforward terms, this means the pitch of the “worm” is the exact same as the round pitch of the worm wheel. A rapid-adjust gearbox is generally utilized with this sort of worm gear. Alternatively, lead-screw modify gears are utilized instead of a fast-change gear box. The pitch of a worm gear equals the helix angle of a screw.
A worm gear’s axial pitch should match the circular pitch of a equipment with a greater axial pitch. The circular pitch is the length between the details of enamel on the worm, even though the axial pitch is the length in between the worm’s enamel. One more aspect is the worm’s direct angle. The angle among the pitch cylinder and worm shaft is known as its direct angle, and the larger the guide angle, the better the effectiveness of a gear.
Worm equipment tooth geometry may differ based on the producer and intended use. In early worms, threading resembled the thread on a screw, and was simply chased employing a lathe. Later on, grinding enhanced worm thread finishes and minimized distortions from hardening. As a outcome, these days, most worm gears have a thread sample corresponding to their dimensions. When deciding on a worm gear, make positive to examine for the variety of threads just before getting it.
A worm gear’s threading is vital in its procedure. Worm enamel are normally cylindrical, and are organized in a sample comparable to screw or nut threads. Worm teeth are frequently shaped on an axis of perpendicular when compared to their parallel counterparts. Because of this, they have better torque than their spur gear counterparts. In addition, the gearing has a lower output velocity and high torque.

Variety of threads

Distinct sorts of worm gears use distinct quantities of threads on their planetary gears. A one threaded worm equipment must not be used with a double-threaded worm. A single-threaded worm equipment should be utilized with a solitary-threaded worm. One-threaded worms are a lot more successful for speed reduction than double-threaded kinds.
The variety of threads on a worm’s shaft is a ratio that compares the pitch diameter and amount of tooth. In general, worms have 1,2,4 threads, but some have a few, 5, or six. Counting thread starts off can aid you decide the quantity of threads on a worm. A single-threaded worm has much less threads than a a number of-threaded worm, but a multi-threaded worm will have a lot more threads than a mono-threaded planetary gear.
To measure the quantity of threads on a worm shaft, a small fixture with two floor faces is used. The worm need to be taken out from its housing so that the finished thread spot can be inspected. After figuring out the number of threads, straightforward measurements of the worm’s outside the house diameter and thread depth are taken. As soon as the worm has been accounted for, a solid of the tooth room is made making use of epoxy material. The casting is moulded among the two tooth flanks. The V-block fixture rests against the exterior diameter of the worm.
The circular pitch of a worm and its axial pitch should match the circular pitch of a greater equipment. The axial pitch of a worm is the distance between the factors of the tooth on a worm’s pitch diameter. The guide of a thread is the distance a thread travels in a single revolution. The guide angle is the tangent to the helix of a thread on a cylinder.
The worm gear’s speed transmission ratio is primarily based on the amount of threads. A worm gear with a large ratio can be easily reduced in one particular phase by employing a set of worm gears. Even so, a multi-thread worm will have a lot more than two threads. The worm equipment is also more effective than single-threaded gears. And a worm gear with a high ratio will allow the motor to be utilized in a range of programs.
worm shaft


The lubrication of a worm gear is notably difficult, owing to its friction and higher sliding get in touch with pressure. The good news is, there are a number of possibilities for lubricants, such as compounded oils. Compounded oils are mineral-based lubricants formulated with 10 p.c or far more fatty acid, rust and oxidation inhibitors, and other additives. This mix outcomes in improved lubricity, diminished friction, and reduce sliding put on.
When picking a lubricant for a worm shaft, make positive the product’s viscosity is proper for the sort of gearing utilized. A minimal viscosity will make the gearbox tough to actuate and rotate. Worm gears also endure a higher sliding motion than rolling motion, so grease should be in a position to migrate evenly during the gearbox. Repeated sliding motions will push the grease absent from the make contact with zone.
Another consideration is the backlash of the gears. Worm gears have high equipment ratios, occasionally 300:1. This is essential for power programs, but is at the identical time inefficient. Worm gears can produce warmth for the duration of the sliding motion, so a substantial-quality lubricant is vital. This variety of lubricant will decrease warmth and make sure optimum efficiency. The pursuing tips will aid you select the right lubricant for your worm equipment.
In lower-speed purposes, a grease lubricant could be enough. In higher-velocity purposes, it really is best to use a synthetic lubricant to avoid premature failure and tooth use. In the two situations, lubricant selection depends on the tangential and rotational velocity. It is critical to adhere to manufacturer’s suggestions relating to the selection of lubricant. But keep in mind that lubricant selection is not an straightforward activity.

China Hot selling Swl Worm Screw Jack for Lifting     with Great qualityChina Hot selling Swl Worm Screw Jack for Lifting     with Great quality