Basic Info.
Work Temperature
Normal Temperature
Working Method
Straight Trip
Adjusted Form
Regulated Type
Transport Package
Plywood Pallet
Specification
Bore 2” x Stroke 4" with 1.125" Rod
Product Description
Knuckleboom loaders have become indispensable in the material handling industry, providing efficient and versatile solutions for various applications.
One of the key components that empower these machines is the hydraulic cylinder. With its robust design and exceptional power, the hydraulic cylinder plays a crucial role in enhancing the performance and functionality of knuckleboom loaders.
The integration of hydraulic cylinders in knuckleboom loaders has revolutionized the material handling industry.
Hydraulic cylinders are essential components in the operation of wheel skidders, which are widely used in forestry and construction industries. These powerful machines are designed to efficiently transport and load heavy logs and debris in rugged terrains.
The hydraulic cylinders in wheel skidders are responsible for providing the necessary force and control to perform various tasks, making them vital for the machine's overall performance and productivity,enabling efficient and precise operation in forestry and construction industries.
Their ability to generate high forces, adjustability, and durability make them indispensable for lifting, carrying, and maneuvering heavy loads in challenging terrains.
Hydraulic cylinders are essential components in track feller bunchers, heavy-duty machines used in the forestry industry for tree harvesting and processing. These cylinders play a vital role in various functions of the machine, providing the necessary power and control for efficient operations.
Hydraulic cylinders are used for the stabilization and leveling of the track feller buncher. These cylinders help maintain the stability of the machine on uneven terrain, ensuring safe and secure operations. They allow the machine to adjust its position and balance to overcome obstacles and maintain stability during tree cutting and handling.
Hydraulic cylinders play a vital role in the operation of wheel feller bunchers, which are powerful machines used in the forestry industry for tree harvesting and processing.
These cylinders are essential for various functions, such as controlling the cutting head, the boom arm, and the grapple. By exerting hydraulic pressure, these cylinders provide the necessary force and precision to efficiently cut and process trees.
Established in
1988 , Ningbo LD Machinery Co, LTD. (hereinafter referred to "LD") is a leading manufacturer specializing in the design, research, development, manufacture and marketing in the hydraulic industry. Being one of major suppliers of customized components and cylinders for manufacturers spreaded all over the world, the company is committed to offer high quality products with competitive prices and excellent service worldwide.
Headquartered in Ningbo City, Zhejiang Province, the company wholly owns a subsidiary production factory named "Ningbo YUEWEI Hydraulic Technology Co., Ltd", which covers an area of more than
380,000 square meters , possesses abundant technical strength and sound production management system, superior machining production equipment, strict and effective quality control system, advanced and excellent inspection instruments.
More than
35 years experience in machining industry, with over
10 experienced technical engineers and
150 skilled workers, LD has a senior engineering technical team with special skills and rich experience in product design, casting, forging, and CNC machining, can handle special material, structure, defect and processing, meet the evolving needs, and provide optimal solution and real one-stop service to customers.
Hydraulic Cylinder Producing Process
Step1: Quality Control on Raw MaterialWe have our own lab in factory, inspect the raw material and do the test. For every batch of material we received, we will ask supplier provide their certificate, and then cut them to do the test again to see if the results match the certification. Also, every batch we received, we will cut them into pieces to check the air bubbles. Once they are all qualified, we will accept it, and all detail information will be recording in our ERP system. We will also pay lot of attention on the salt spray test for chrome rod. Every month, we will cut the material, put them into test machine to see if it reach the requirement. All the result will be recorded at our QC department. If customer need, we can provide it.
Step2: Quality Control on Machiningwe start doing components machining from 1988 with 36 years experience now and insist doing 100% inspection. We spend lots of money, invest on auto robots and machines. Now half of the producing line is by robot so that we can ensure our quality be stable good. For every part of the cylinder, we do 3 times inspecting. Firstly, workers will do self inspection. Secondly, we have tour-hour inspection checking the products, two times in the morning and two times in the afternoon, make sure that every step is good. After the products are all completed, we will do 100% inspection. For thread, for the tolerance, everything, we need double check. Also, we have specific warehouse just for the measuring tools. Every inspector have their own measuring tool and we will check the measuring tools regularly to make sure they are all in good condition, so that the measuring results will be convincing.
Step3: Quality Control on WeldingWe are qualified to AWS certification, which is very popular in North American market. First, for the visual test, we will make sure that every components are welded good, look beautiful. And the second, we need to check the penetration. We have more than 15 years experience, we do know what kind of designing angle can make the cylinder welding strong. Once we finish the first article, we will cut it and analyse the welding to see if it is fulfill the groove. And then do the radiographic testing to make sure there is no gap inside. What's more, we will do the ultrasonic test to check the program for the robot. Now 80% of welding is doing by robot. Once the program confirmed, no one can change it unless the welding manager, and they only have 5% right.
Step4: Quality Control on AssemblingFor assembling, we have some difference with others. The brand we uses for seals are all those famous brand like Aston, Parker, Hallite. The cylinder we give to our customer has two years warranty. For our company, we engrave our part number and manufacturing date for the quality warranty. So no matter for seals or any others, as long as they are parts of cylinder, if it is under two years, we will take responsibility for them. And we will do the test for every cylinder like for pressure after we finish assembling.
Step5: Quality Control on PaintingWe have our half auto painting line. Right now, we can paint about 1500 cylinders per day, which is about one container. Before we do the painting, we will do the wash first and for every cylinder, we will test for hardness, thickness and adhesion to make sure the painting are all good, which will be recorded into OQC report, print out and stick on the box, ship to you with your products.
Step6: Hydraulic Cylinder PackingFor every cylinder, we have the stick to show the detail information like bore size, stroke and working pressure. And we will use individual plastic bag packing. If customer need, we can also use individual carton box packing. We will fasten one floor after one floor with plat, so customer can only cut what they need and other layer will still be fasten. Moreover, there will be plywood pallet or plywood box for customer choosing. We will also send the loading picture to customer after we ship them to make sure everything is well loaded in China.
Packing Reference
Order Process
Enterprise Features
FAQ
Q1. What is LD product's quality assurance?
100% inspection for each product before shipping with inspection rereport for tracking.
Q2: How long is the warranty on LD products?
The warranty is 2 years for general products since the date of shipment.
Q3: How LD deal with the quality problem during warranty period?
1. LD will take the corresponding cost caused by customer local reparing.
2. LD will provide the product by free if the repair cost is higher than the product value, but the freight involved shall be borne by customer side.
Q4: How to ensure the order can be shipped on time?
LD will send the "production schedule" every week after receiving customers' orders. If any delays, LD will inform customers 3 weeks in advance, so as to facilitate the customer to arrange the schedule.
Q5: Does LD offer delivery service?
Yes. LD has deep cooperation with logistics companies all over the world to provide customers with quick and convenient "Door-to-Door services",including sea, air and express.
Q6: How LD control the product quality?
1. Raw materials: We will test the material of each batch of raw materials we receive, and the piston rod will be tested with salt spray. This is to ensure that the material of our products meets the requirements at the beginning.
2. Processing: We have the leading machining equipment, and obtained ISO9001 certification.
3. Welding: Our factory is equipped with welding robots, and has obtained the AWS certification.
4. Assembly pressure test: 100% testing with OQC report for chaining. The seals we use are: Hallite, Aston and Gapi
Address:
Xiwu Street No. 50, Fenghua District, Ningbo, Zhejiang, China
Business Type:
Manufacturer/Factory
Business Range:
Industrial Equipment & Components, Manufacturing & Processing Machinery
Management System Certification:
ISO 9001, ISO 14001
Company Introduction:
Ningbo LD Hydraulic Co., Ltd. Was founded in 1988, the company covers an area of 380, 000 sqft, with more than 150 employees. The company specializes in the production of hydraulic cylinders. Through the construction of modern factories, LD has become a high-tech company transforming from traditional manufacturing to intelligent manufacturing.
LD rely on the industrial Internet of Things platform, the comprehensive use of ERP, CRM, WMS, MES and other systems for all aspects of supervision, the formation of data association linkage mechanism, give full play to the advantages of intelligent production.
We has a full set of advanced equipment, from the "elemental and mechanical property analysis of raw materials" to the "comprehensive quality control of finished products", as well as the final step "product cylinder testing", LD always take the quality as the lead, to achieve the ultimate goal of 100% rate qualified products.
LD has a professional hydraulic design R & D team, fully used 3D design, virtual simulation, digital twin and other technologies, establish a digital R & D platform, integrate CAD, CAE, PDM, CAPP and other systems, to achieve the rapid transmission of design information and manufacturing information, significantly improve the digital R & D capability of hydraulic cylinder, to achieve rapid and efficient product development.
LD is qualified with ISO9001, ISO14001, AWS certification. Products are widely used in agricultural equipments, construction equipment, garden equipments, environmental equipments etc. In year 2022, Ningbo LD produced more than 450, 000 cylinders. Our good stable quality, competitive prices, great service has been unanimously recognized by customers all over the world.
The company is determined to continuously improve our core competitiveness, provide global customers with more stable, efficient and reliable China-made hydraulic cylinders.
Our products, our pride.
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