Screw Jacks
1. Suitable for heavy load, low speed and low frequency;
2. Main components: precision trapezoid screw pair and high precision worm gear pair;
3. Compact design, small volume, light weight, wide drive sources, low noise, easy operation, convenient maintenance.
4. The trapezoid screw has self-locking function, it can hold up load without braking device when screw stops traveling.
5. The lifting height can be adjusted according to customer requirements.
6. Widely applied in industries such as machinery, metellurgy, construction and hydraulic equipment.
7. Top End: top plate, clevis end, TO-012 automotive parts and accessories cv Joint automotive body parts threaded end, plain end
Images & Parts Name
How to choose model?
1.Do you want manual (hand wheel) type or electric motor as driver type?See the following
Manual (hand wheel) type Electric motor type
2.Do you need translating nut movement or translating screw movement ? Nut movement has a better precision than screw movement
Translating nut movement Translating screw movement
3. Pull or lift (Upright or Inverted ) ?
4. Which type of Screw Top you need?
5. Tell me your lift capacity (how many kilos or tons) and the screw travel distance(? mm — ? mm), below is the performance of SWL series screw jack, Besides we can also supply SJA/B,JWM/B series and can customize.
SWL Performance Table:
6. The input type / Input model
There are also single axis input, dual axis input and flange input model, pls clear us the input model you want.
single axis input dual axis input flange input
7. The linkage scheme (if you need 2 or more quantity screw jacks)
Linkage scheme solutions as following (2 sets, 4 sets, 8 sets)
Application Example:
Packaging & Shipping Payment:
We accept T/T, the Credit Card, Paypal, L/C, AT5 AT10 T2.5 T5 T10 MXL XL L H XH HTD Series Timing Belt Pulleys Alibaba Trade Assurance etc.
Packaging:
1. Common package: PE bags with bubble, carton box then bubble, the outmost is plywood box, safe package.
2. Or according to clients’ requirements.
Shipping:
1. Sea transportation, shipping FCL or shipping LCL, this is the most common way
2. Land transportation, this is suitable for the inland countries
3. Air transportation, this is used in the very urgent order
4. Express DHL,TNT,UPS,Fedex etc., this is always used for the sample order to test and also be very urgent order.
Delivery:
1. Standard Items: 15-30 working days.
Our Services1.Low MOQ : It can meet your promotional business very well.
2.OEM&ODM : Accepted.
3.Good Service : We treat each of our clients like friends and our family.
4.Good Quality : 100% inspection with strict quality control system, we have passed the ISO9001:2008 quality system authentication.
5.Prompt Feedback : We reply every clients within 2 hours.
6.Accurate delivery : We ship on time or in advance 100%.
7.After Sales Services : We continue to serve you after sales and will be responsible for quality problem.
FAQQ1. Can I get 1 sample to test?
A: Yes, for chery auto car automobile automotive CV joint drive shaft factory manufacturer CR-601 255530 sample can be at a very low price and welcomed. The transport fees are at your account.
Q2. How about the quality of your product?
A: It is very popular by our customers, we have a sale volume of USD 8000,000.00 each year and we 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, 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.
Company InformationHangZhou Lude Transmission Equipment Co.,Ltd is concentrated on SCREW JACK and SLEWING DRIVE 2 main products line in transmission industry since 2001 and FREE CUSTOMIZE SERVICE CAN BE OFFERED. There are more than 350 employee in our factory, among them there are 35 technology research and development staff and 30 quality inspection personnel and 20 after sale service staff. 60% of the staff have college degree or above.
Our company enjoys high-end CNC machining, quality inspection machines, technology research machines for many, see the picture following.
Contact for more details to discussing, oem cnc machined M3 threaded bushing 10 for sales this is very necessary…
Worm Gear Motors
Worm gear motors are often preferred for quieter operation because of the smooth sliding motion of the worm shaft. Unlike gear motors with teeth, which may click as the worm turns, worm gear motors can be installed in a quiet area. In this article, we will talk about the CZPT whirling process and the various types of worms available. We’ll also discuss the benefits of worm gear motors and worm wheel.
worm gear
In the case of a worm gear, the axial pitch of the ring pinion of the corresponding revolving worm is equal to the circular pitch of the mating revolving pinion of the worm gear. A worm with one start is known as a worm with a lead. This leads to a smaller worm wheel. Worms can work in tight spaces because of their small profile.
Generally, a worm gear has high efficiency, but there are a few disadvantages. Worm gears are not recommended for high-heat applications because of their high level of rubbing. A full-fluid lubricant film and the low wear level of the gear reduce friction and wear. Worm gears also have a lower wear rate than a standard gear. The worm shaft and worm gear is also more efficient than a standard gear.
The worm gear shaft is cradled within a self-aligning bearing block that is attached to the gearbox casing. The eccentric housing has radial bearings on both ends, enabling it to engage with the worm gear wheel. The drive is transferred to the worm gear shaft through bevel gears 13A, one fixed at the ends of the worm gear shaft and the other in the center of the cross-shaft.
worm wheel
In a worm gearbox, the pinion or worm gear is centered between a geared cylinder and a worm shaft. The worm gear shaft is supported at either end by a radial thrust bearing. A gearbox’s cross-shaft is fixed to a suitable drive means and pivotally attached to the worm wheel. The input drive is transferred to the worm gear shaft 10 through bevel gears 13A, one of which is fixed to the end of the worm gear shaft and the other at the centre of the cross-shaft.
Worms and worm wheels are available in several materials. The worm wheel is made of bronze alloy, aluminum, or steel. Aluminum bronze worm wheels are a good choice for high-speed applications. Cast iron worm wheels are cheap and suitable for light loads. MC nylon worm wheels are highly wear-resistant and machinable. Aluminum bronze worm wheels are available and are good for applications with severe wear conditions.
When designing a worm wheel, it is vital to determine the correct lubricant for the worm shaft and a corresponding worm wheel. A suitable lubricant should have a kinematic viscosity of 300 mm2/s and be used for worm wheel sleeve bearings. The worm wheel and worm shaft should be properly lubricated to ensure their longevity.
Multi-start worms
A multi-start worm gear screw jack combines the benefits of multiple starts with linear output speeds. The multi-start worm shaft reduces the effects of single start worms and large ratio gears. Both types of worm gears have a reversible worm that can be reversed or stopped by hand, depending on the application. The worm gear’s self-locking ability depends on the lead angle, pressure angle, and friction coefficient.
A single-start worm has a single thread running the length of its shaft. The worm advances one tooth per revolution. A multi-start worm has multiple threads in each of its threads. The gear reduction on a multi-start worm is equal to the number of teeth on the gear minus the number of starts on the worm shaft. In general, a multi-start worm has two or three threads.
Worm gears can be quieter than other types of gears because the worm shaft glides rather than clicking. This makes them an excellent choice for applications where noise is a concern. Worm gears can be made of softer material, making them more noise-tolerant. In addition, they can withstand shock loads. Compared to gears with toothed teeth, worm gears have a lower noise and vibration rate.
CZPT whirling process
The CZPT whirling process for worm shafts raises the bar for precision gear machining in small to medium production volumes. The CZPT whirling process reduces thread rolling, increases worm quality, and offers reduced cycle times. The CZPT LWN-90 whirling machine features a steel bed, programmable force tailstock, and five-axis interpolation for increased accuracy and quality.
Its 4,000-rpm, 5-kW whirling spindle produces worms and various types of screws. Its outer diameters are up to 2.5 inches, while its length is up to 20 inches. Its dry-cutting process uses a vortex tube to deliver chilled compressed air to the cutting point. Oil is also added to the mixture. The worm shafts produced are free of undercuts, reducing the amount of machining required.
Induction hardening is a process that takes advantage of the whirling process. The induction hardening process utilizes alternating current (AC) to cause eddy currents in metallic objects. The higher the frequency, the higher the surface temperature. The electrical frequency is monitored through sensors to prevent overheating. Induction heating is programmable so that only certain parts of the worm shaft will harden.
Common tangent at an arbitrary point on both surfaces of the worm wheel
A worm gear consists of two helical segments with a helix angle equal to 90 degrees. This shape allows the worm to rotate with more than one tooth per rotation. A worm’s helix angle is usually close to 90 degrees and the body length is fairly long in the axial direction. A worm gear with a lead angle g has similar properties as a screw gear with a helix angle of 90 degrees.
The axial cross section of a worm gear is not conventionally trapezoidal. Instead, the linear part of the oblique side is replaced by cycloid curves. These curves have a common tangent near the pitch line. The worm wheel is then formed by gear cutting, resulting in a gear with two meshing surfaces. This worm gear can rotate at high speeds and still operate quietly.
A worm wheel with a cycloid pitch is a more efficient worm gear. It reduces friction between the worm and the gear, resulting in greater durability, improved operating efficiency, and reduced noise. This pitch line also helps the worm wheel engage more evenly and smoothly. Moreover, it prevents interference with their appearance. It also makes worm wheel and gear engagement smoother.
Calculation of worm shaft deflection
There are several methods for calculating worm shaft deflection, and each method has its own set of disadvantages. These commonly used methods provide good approximations but are inadequate for determining the actual worm shaft deflection. For example, these methods do not account for the geometric modifications to the worm, such as its helical winding of teeth. Furthermore, they overestimate the stiffening effect of the gearing. Hence, efficient thin worm shaft designs require other approaches.
Fortunately, several methods exist to determine the maximum worm shaft deflection. These methods use the finite element method, and include boundary conditions and parameter calculations. Here, we look at a couple of methods. The first method, DIN 3996, calculates the maximum worm shaft deflection based on the test results, while the second one, AGMA 6022, uses the root diameter of the worm as the equivalent bending diameter.
The second method focuses on the basic parameters of worm gearing. We’ll take a closer look at each. We’ll examine worm gearing teeth and the geometric factors that influence them. Commonly, the range of worm gearing teeth is one to four, but it can be as large as twelve. Choosing the teeth should depend on optimization requirements, including efficiency and weight. For example, if a worm gearing needs to be smaller than the previous model, then a small number of teeth will suffice.
