China Best Sales Constant Current Drive CCC Approved Fws Freight Cabinet Case Basketball Scoreboard LED Screen with Great quality

Product Description

Superior quality LED displays by FWS Led
All Sizes and Resolutions Available
Weatherproof: Made to Withstand Rain, Snow, and Any Weather
Customizable: We Can Create Any Size and Configuration
LED Rental Cabinet
Picture for 500 x 500 and 500 x 1000 Cabinet

Memorize Parameters including Brightness, Chroma Fixation Figures, and Module Parameters when power is cut.

     LED DISPLAYS MANUFACTURING FWS Led designs customized LED advertising screens for each project and client, so they are customized screens.    


  Parameters  P2.976 P3.91 P4.81
Technical parameter



Pixel Pitch 2.976mm 3.91mm 4.81mm
Module Definition 84W x 84H 64W×64H = 4096 52W× 52H = 2074
Cabinet Pixel Density 112896 Pixel/m^2 65536 Pixel/m2 43264 Pixel/m2
Driver Type  1/ 21 Scans  1/ 32 Scans  1/ 32 Scans 
Pixel Structrue SMD1921 3 in 1 LED 
Module Size 250mm × 250mm 
Module Weight 0.65KG
Module Maximun Power Dissipation ≤42W
Average Power Dissipation 450 W/sqm
Refresh Rate >1920HZ
Waterproof Rating  IP 65
Brightness ≥3500-4500

Pre-Sales Service
1) Your inquiry related to our products or price will be replied to in 24 hours.
2) Well-trained and experienced staff to answer all your inquiries in fluent English.
3) OEM&ODM, any your customized screen we can help you to design and put into product.
4) Distributorships are offered for your unique design and some of our current models.
5) Protection of your sales area, ideas of design, and all your private information.

After-Sales Service
1. Free training: 
You can send your engineers who know electronics and information to our factory and we provide free technical training, which contains training operation and maintenance of the LED display at our factory. We also offer the instruction manual, software, test report, drawing steel structure, and so on. 
2. Installation: 
We can offer you an engineer to install the LED display, but you have to offer him two-way air tickets and accommodation, and a visa. The engineer’s salary is $80/day, or we can CZPT you to install the screen by team-viewer remote control. 
3. After-Sales Service;
If you have any questions about our product, you can inform us by mail or call, and we will reply to you in 24 hours, and offer you a good solution for your problem.


Trade Terms
1)  Payment: T/T, usually 50% prepayment before production,
     50% balance to be paid before delivery, it also changes according to the total  quantity
2)  50% of the total price must be paid before production as a down payment. (T/T)
     The other 50% must reach the seller’s accounts on the delivery date, or the seller will hold the products. (T/T)
3)  Sample can be delivered in 10 days
4)  Shipping port: HangZhou, Mainland China
5)  Discounts are offered based on order quantities.

About Us

  Our company is named HangZhou FWS Technology Co., Ltd. was established in May 2008. It’s a high-tech enterprise which is specialized in researching, designing, manufacturing, and exporting all kinds of led displays. With qualified talents, high technology, and abundant funds, we have many offices and branches in most cities of China, so we can offer fast and perfect service to our clients.

              Our Company has a high-quality
experienced technicians and advanced modern production equipment; CZPT machine, injection molding machine, COB machine, high-temperature aging furnace, TABLE machine (point-by-point brightness debug) reflow soldering machine and several wave soldering machines, PCBA lines, automatic packaging production lines and 3,000sqm aging vertical testing stand. Fully implement strict ISO9001-2000 quality management, and strive to make every piece of LED displays, LED unit boards, modules, lighting to be the best, our products have passed the European CE, American UL certification and other related certifications.



Our Clients



Q1; How do you ship the goods and how long does it take to arrive?
A: We mostly accept FOB train terms, but we can help you order and arrange a shipping agent.
It usually takes 20-30 days on the sea. a few days for customs clearance.

Q2; Is it OK to print my logo on the products?
A: Yes. Please inform us formally before our production and confirm the design firstly based on our sample.

Q3; Are you a manufacturer or trading company?
A: We are a professional OEM/ODM manufacturer specializing in the LED Display industry for more than 11 years.

Q4; How does your factory do regarding quality control?
A; Quality is a priority. Brighter people always attach great importance to quality control from the very beginning to the very end.
    We focus on every detail, Our factory has gained ISO9001, ISO14001, CE, RoHS, and FCC authentication.

Q5; Do you provide any free spare parts in each order?
A; Yes, a certain amount of spare parts will be provided for free, spare parts including modules,
    power cable, signal cable, LED lamp, IC, mask, power supply, receiving card, etc.

Q6; How about your Warranty Term?
A: 3-year warranty. Structure design, installation problem, program the screen, how to use the screen…don’t worry, we have a professional after-sale team to solve any questions after you placed an order. And your exclusive sales engineer will also help you get over any problems.

Q7; What is your best service?
A: One to 1 sales engineer to customer responsibility system. We will do:
1. Know your project and provide the best solution for it;
2. Track your order and let you know each step and detail of it;
3. Teach you how to install and use the screen;
4. Care about the subsequent use of your screen and ensure your after-sales service is well.


Applications of Spline Couplings

A spline coupling is a highly effective means of connecting 2 or more components. These types of couplings are very efficient, as they combine linear motion with rotation, and their efficiency makes them a desirable choice in numerous applications. Read on to learn more about the main characteristics and applications of spline couplings. You will also be able to determine the predicted operation and wear. You can easily design your own couplings by following the steps outlined below.

Optimal design

The spline coupling plays an important role in transmitting torque. It consists of a hub and a shaft with splines that are in surface contact without relative motion. Because they are connected, their angular velocity is the same. The splines can be designed with any profile that minimizes friction. Because they are in contact with each other, the load is not evenly distributed, concentrating on a small area, which can deform the hub surface.
Optimal spline coupling design takes into account several factors, including weight, material characteristics, and performance requirements. In the aeronautics industry, weight is an important design factor. S.A.E. and ANSI tables do not account for weight when calculating the performance requirements of spline couplings. Another critical factor is space. Spline couplings may need to fit in tight spaces, or they may be subject to other configuration constraints.
Optimal design of spline couplers may be characterized by an odd number of teeth. However, this is not always the case. If the external spline’s outer diameter exceeds a certain threshold, the optimal spline coupling model may not be an optimal choice for this application. To optimize a spline coupling for a specific application, the user may need to consider the sizing method that is most appropriate for their application.
Once a design is generated, the next step is to test the resulting spline coupling. The system must check for any design constraints and validate that it can be produced using modern manufacturing techniques. The resulting spline coupling model is then exported to an optimisation tool for further analysis. The method enables a designer to easily manipulate the design of a spline coupling and reduce its weight.
The spline coupling model 20 includes the major structural features of a spline coupling. A product model software program 10 stores default values for each of the spline coupling’s specifications. The resulting spline model is then calculated in accordance with the algorithm used in the present invention. The software allows the designer to enter the spline coupling’s radii, thickness, and orientation.


An important aspect of aero-engine splines is the load distribution among the teeth. The researchers have performed experimental tests and have analyzed the effect of lubrication conditions on the coupling behavior. Then, they devised a theoretical model using a Ruiz parameter to simulate the actual working conditions of spline couplings. This model explains the wear damage caused by the spline couplings by considering the influence of friction, misalignment, and other conditions that are relevant to the splines’ performance.
In order to design a spline coupling, the user first inputs the design criteria for sizing load carrying sections, including the external spline 40 of the spline coupling model 30. Then, the user specifies torque margin performance requirement specifications, such as the yield limit, plastic buckling, and creep buckling. The software program then automatically calculates the size and configuration of the load carrying sections and the shaft. These specifications are then entered into the model software program 10 as specification values.
Various spline coupling configuration specifications are input on the GUI screen 80. The software program 10 then generates a spline coupling model by storing default values for the various specifications. The user then can manipulate the spline coupling model by modifying its various specifications. The final result will be a computer-aided design that enables designers to optimize spline couplings based on their performance and design specifications.
The spline coupling model software program continually evaluates the validity of spline coupling models for a particular application. For example, if a user enters a data value signal corresponding to a parameter signal, the software compares the value of the signal entered to the corresponding value in the knowledge base. If the values are outside the specifications, a warning message is displayed. Once this comparison is completed, the spline coupling model software program outputs a report with the results.
Various spline coupling design factors include weight, material properties, and performance requirements. Weight is 1 of the most important design factors, particularly in the aeronautics field. ANSI and S.A.E. tables do not consider these factors when calculating the load characteristics of spline couplings. Other design requirements may also restrict the configuration of a spline coupling.


Spline couplings are a type of mechanical joint that connects 2 rotating shafts. Its 2 parts engage teeth that transfer load. Although splines are commonly over-dimensioned, they are still prone to fatigue and static behavior. These properties also make them prone to wear and tear. Therefore, proper design and selection are vital to minimize wear and tear on splines. There are many applications of spline couplings.
A key design is based on the size of the shaft being joined. This allows for the proper spacing of the keys. A novel method of hobbing allows for the formation of tapered bases without interference, and the root of the keys is concentric with the axis. These features enable for high production rates. Various applications of spline couplings can be found in various industries. To learn more, read on.
FE based methodology can predict the wear rate of spline couplings by including the evolution of the coefficient of friction. This method can predict fretting wear from simple round-on-flat geometry, and has been calibrated with experimental data. The predicted wear rate is reasonable compared to the experimental data. Friction evolution in spline couplings depends on the spline geometry. It is also crucial to consider the lubrication condition of the splines.
Using a spline coupling reduces backlash and ensures proper alignment of mated components. The shaft’s splined tooth form transfers rotation from the splined shaft to the internal splined member, which may be a gear or other rotary device. A spline coupling’s root strength and torque requirements determine the type of spline coupling that should be used.
The spline root is usually flat and has a crown on 1 side. The crowned spline has a symmetrical crown at the centerline of the face-width of the spline. As the spline length decreases toward the ends, the teeth are becoming thinner. The tooth diameter is measured in pitch. This means that the male spline has a flat root and a crowned spline.


Spindle couplings are used in rotating machinery to connect 2 shafts. They are composed of 2 parts with teeth that engage each other and transfer load. Spline couplings are commonly over-dimensioned and are prone to static and fatigue behavior. Wear phenomena are also a common problem with splines. To address these issues, it is essential to understand the behavior and predictability of these couplings.
Dynamic behavior of spline-rotor couplings is often unclear, particularly if the system is not integrated with the rotor. For example, when a misalignment is not present, the main response frequency is 1 X-rotating speed. As the misalignment increases, the system starts to vibrate in complex ways. Furthermore, as the shaft orbits depart from the origin, the magnitudes of all the frequencies increase. Thus, research results are useful in determining proper design and troubleshooting of rotor systems.
The model of misaligned spline couplings can be obtained by analyzing the stress-compression relationships between 2 spline pairs. The meshing force model of splines is a function of the system mass, transmitting torque, and dynamic vibration displacement. This model holds when the dynamic vibration displacement is small. Besides, the CZPT stepping integration method is stable and has high efficiency.
The slip distributions are a function of the state of lubrication, coefficient of friction, and loading cycles. The predicted wear depths are well within the range of measured values. These predictions are based on the slip distributions. The methodology predicts increased wear under lightly lubricated conditions, but not under added lubrication. The lubrication condition and coefficient of friction are the key factors determining the wear behavior of splines.

China Best Sales Constant Current Drive CCC Approved Fws Freight Cabinet Case Basketball Scoreboard LED Screen   with Great qualityChina Best Sales Constant Current Drive CCC Approved Fws Freight Cabinet Case Basketball Scoreboard LED Screen   with Great quality