Manufacturers Hot Hydraulic Cylinder for Backhoes with Good Price Double Acting Hydraulic Cylinder

• Certification: ISO9001
• Pressure: Medium Pressure
• Work Temperature: Normal Temperature
• Acting Way: Double Acting
• Working Method: Straight Trip
• Adjusted Form: Regulated Type
• Structure: Piston Type
• Material: Carbon Steel
• Oil Port: NPT/SAE/BSPP
• Seals: Parker/Hallite/Gapi
• Bore Size: 40mm-320mm
• Surface Treatment: Hard Chrome,Zinc,Copper
• MOQ: 50 PCS
• Operating Temperature: -40 Degree to +120 Degree
• Leading Time: 40-50 Working Days
• Quality Check: 100% Testing Before Shipping
• Acting Type: Double Acting or Single Acting
• Power: Hydraulic
• Paint Color: Black,Red,Gray,Yellow,Blue,Customization
• Transport Package: Plywood Pallets
• Trademark: Ningbo LD
• Origin: Ningbo
• HS Code: 841221009
• Production Capacity: 800, 000PCS/Year

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. 

About Us

Ningbo LD Machinery Co., LTD., established in 1988, is a leading manufacturer of hydraulic products, specializing in the design,  development, manufacture and marketing in the hydraulic industry, owns a subsidiary factory, Ningbo YUEWEI Hydraulic Technology Co., Ltd., covering 380,000+ square meters with advanced equipment, strong technical strength, and a rigorous quality control system.

With over 35 years of experience, LD's technical team of over 10 engineers and 150+ skilled workers excels in product design, casting, forging, and CNC machining. They meet evolving needs, provide optimal solutions, and offer one-stop services to customers.

 

Hydraulic Cylinder Producing Process

Step1: Quality Control on Raw Material
We maintain a lab in our factory for rigorous raw material inspection and testing:

·Spectro Machine for Chemical Properies Test
·Brinell Hardness Tester
·Surface Roughness Tester
·Metallographic Polishing Machine
·Microscope
·Rockwell Hardness Tester

For each batch received, we verify supplier certificates and conduct additional testing to ensure consistency. We also check for air bubbles in every batch. Only qualified materials are accepted and detailed records are logged in our ERP system. Additionally, we focus on salt spray tests for chrome rods and record monthly results in our QC department for customer reference if needed.

Step2: Quality Control on Machining
With 36 years of machining experience since 1988, we uphold 100% inspection. We invest heavily in auto robots and machines, with half of our production line automated to guarantee consistent quality. For cylinder parts, we conduct 3 rounds of inspections: self-inspection by workers, tour-hour checks (twice in the morning and afternoon), and final 100% inspection. Threads, tolerances, and everything are double-checked. We have a dedicated warehouse for measuring tools, and regularly inspect them to ensure accuracy and reliability of measurements.

Step3: Quality Control on Welding
We hold the AWS certification, highly regarded in the North American market. For visual tests, we ensure all components are welded securely and aesthetically. Penetration checks follow, leveraging our 15+ years of experience in optimizing welding angles for cylinder strength. After completing the first article, we analyse the welding to verify groove compliance and conduct radiographic testing for internal gap detection. Additionally, ultrasonic testing verifies the robot welding program, now handling 80% of welding. Once the program is confirmed, only the welding manager (with 5% modification rights) can make changes.

Step4: Quality Control on Assembling
For assembly, we stand apart. We use renowned brands like Aston, Parker, Hallite for seals. Our cylinders come with a two-year warranty. We engrave part numbers and manufacturing dates for quality assurance. If any part of the cylinder, including seals, fails within two years, we'll take responsibility. Additionally, we conduct post-assembly pressure tests on every cylinder.

Step5: Quality Control on Painting
We operate a half-automatic painting line, capable of painting 1500 cylinders daily (one container). Pre-painting, cylinders undergo a thorough wash. Each cylinder is then tested for hardness, thickness, and adhesion to ensure quality. These results are recorded in the OQC report, printed, and affixed to the box for shipment with your products.

Step6: Hydraulic Cylinder Packing
Each cylinder has a sticker with detailed info like bore size, stroke, and working pressure. We use individual plastic bags for packing. If needed, we can also use individual carton boxes. Cylinders are stacked and fastened with plat, allowing customers to cut as needed while keeping other layers secure. Customers can choose between plywood pallets or boxes. After shipping, we send a loading picture to ensure everything is loaded properly 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