China manufacturer Hot Selling Popular Size OEM Telescopic Hydraulic Cylinder for Dump Trailer manufacturer

Product Description


The Telescopic Dump Trailer is designed to handle bulk materials with unprecedented efficiency and flexibility. At its heart lies the telescopic cylinder, a core component that enables the trailer to extend and retract its dumping mechanism, delivering remarkable versatility and maneuverability. Its extended reach and precision control enable operators to dump materials at heights that would be otherwise difficult or impossible to reach. This capability opens up a world of possibilities, from accessing hard-to-reach areas to loading and unloading materials more efficiently, even in confined spaces.

Dual Ram
The Dual Ram Dump Trailer is a revolutionary transportation solution, which heart lies the hydraulic cylinder, a key component that enables the trailer’s dual-ram dumping mechanism, delivering superior performance and maneuverability. The Dual Ram Dump Trailer offers a cost-effective solution for material handling operations. Its durability and longevity reduce the need for frequent maintenance or replacements, while its efficiency in loading and unloading materials can significantly cut operational costs.

Scissor Hoist
The Scissor Hoist Dump Trailer is a highly versatile and efficient transportation solution, designed for handling bulk materials in a range of challenging environments. At its core lies the hoist cylinder, a crucial component that enables the scissor-like lifting mechanism and accurate positioning of the trailer’s dumping system. The Scissor Hoist Dump Trailer offers numerous advantages over traditional dump trailers. The hoist cylinder allows for efficient loading and unloading of materials, even in confined spaces or on uneven terrain. The scissor hoist dump trailer’s compact design and maneuverability make it suitable for a variety of applications, from construction sites to waste disposal facilities.

About Us
Established in 1988, HangZhou 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 HangZhou City, ZHangZhoug Province, the company wholly owns a subsidiary production factory named “HangZhou 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 Material
We 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 Machining

we 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, 2 times in the morning and 2 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 Welding

We 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 1 can change it unless the welding manager, and they only have 5% right.

Step4: Quality Control on Assembling
For 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 2 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 2 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 Painting
We have our half auto painting line. Right now, we can paint about 1500 cylinders per day, which is about 1 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 Packing
For 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 1 floor after 1 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

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 cHangZhou. The seals we use are: Hallite, Aston and Gapi

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Warranty: 2 Years Warranty
Seals: Packer/Hallite/Gapi
Surface Treatment: Hard Chrome, Zinc, Copper
Material: 20#Steel/45#Steel
Operating Temperature: -40 Degree to +120 Degree
US$ 300/Piece
1 Piece(Min.Order)




telescopic cylinder

What advantages do telescopic cylinders offer in heavy equipment?

Telescopic cylinders offer several advantages in heavy equipment applications. Here’s a detailed explanation:

Compact design:

Telescopic cylinders have a compact design that allows for a relatively small retracted length compared to their extended length. This compactness is advantageous in heavy equipment where space is limited. The reduced length enables the equipment to have a smaller footprint, making it easier to maneuver in confined areas and transport on trailers or trucks.

Extended reach:

Telescopic cylinders provide extended reach capabilities, which is beneficial in heavy equipment operations. The nested design allows for multiple stages to extend, enabling the cylinder to reach greater distances. This extended reach is particularly useful in applications where the equipment needs to lift or push loads over obstacles, reach into deep pits, or access elevated areas.

High force output:

Telescopic cylinders are capable of generating high force output, making them suitable for heavy lifting and pushing tasks. The hydraulic system used in telescopic cylinders allows for amplification of force through the application of hydraulic pressure. This high force output is advantageous in heavy equipment applications that require lifting and moving heavy loads or exerting significant pushing or pulling forces.

Customizable load capacity:

Telescopic cylinders offer load capacity customization. The modular nature of telescopic cylinders allows for the addition or removal of stages, which directly affects the cylinder’s load capacity. By adjusting the number of stages, the cylinder’s load capacity can be tailored to the specific requirements of the heavy equipment, ensuring optimal performance and safety.

Smooth operation:

Telescopic cylinders provide smooth and controlled operation. The hydraulic control system allows for precise control of the cylinder’s extension and retraction, ensuring smooth and synchronized movement of multiple stages. This smooth operation is important in heavy equipment applications where precise positioning, lifting, or pushing is required to avoid damage to the equipment or the load.

Durability and reliability:

Telescopic cylinders are built to withstand heavy-duty usage in demanding environments. They are designed using robust materials and undergo rigorous testing to ensure durability and reliability. The cylinders can withstand high load capacities, harsh operating conditions, and repetitive cycles, making them well-suited for heavy equipment applications that involve continuous and demanding operations.

Overall, telescopic cylinders offer advantages such as compact design, extended reach, high force output, customizable load capacity, smooth operation, durability, and reliability. These advantages contribute to improved efficiency, productivity, and performance of heavy equipment in various industries.

It’s important to consult the manufacturer’s specifications and guidelines to ensure the appropriate selection and application of telescopic cylinders in heavy equipment.

telescopic cylinder

How do telescopic cylinders handle variations in cylinder size and capacity?

Telescopic cylinders are designed to handle variations in cylinder size and capacity effectively. Here’s a detailed explanation:

Modular design:

Telescopic cylinders feature a modular design that allows for flexibility in cylinder size and capacity. They consist of multiple stages or sections that retract inside one another, similar to a telescope. The number of stages can vary depending on the desired extended length and capacity of the cylinder. This modular design enables telescopic cylinders to be customized according to specific requirements.

Variable stroke length:

Telescopic cylinders offer the advantage of variable stroke length. The stroke length refers to the distance the cylinder can extend and retract. By adjusting the stroke length, the effective size and capacity of the telescopic cylinder can be modified. This flexibility allows for accommodating variations in the size and capacity requirements of different applications.

Increased capacity with additional stages:

Telescopic cylinders can handle variations in capacity by adding more stages to the cylinder. Each stage contributes to the overall capacity of the cylinder. By including additional stages, the cylinder’s capacity can be increased to handle higher loads or operate in more demanding conditions. This scalability makes telescopic cylinders suitable for a wide range of applications with varying capacity needs.

Proportional force distribution:

Telescopic cylinders distribute the applied force proportionally across the stages. As the cylinder extends, each stage contributes to supporting the load and transmitting the force. The force distribution ensures that the load is evenly distributed among the stages, allowing the cylinder to handle variations in capacity effectively.

Hydraulic control system:

Telescopic cylinders rely on a hydraulic control system for operation. The system allows for precise control over the extension and retraction of each stage. By adjusting the hydraulic pressure and flow, operators can regulate the movement and force exerted by the cylinder, ensuring optimal performance and capacity utilization.

Overall, telescopic cylinders handle variations in cylinder size and capacity through their modular design, variable stroke length, ability to add stages for increased capacity, proportional force distribution, and hydraulic control system. These features make telescopic cylinders adaptable to different applications and enable them to effectively handle varying size and capacity requirements.

It’s important to consult the equipment manufacturer’s documentation and guidelines for specific information on the size, capacity, and operational considerations of telescopic cylinders.

telescopic cylinder

How does a telescopic cylinder differ from standard hydraulic cylinders?

A telescopic cylinder differs from standard hydraulic cylinders in several ways. Here’s a detailed explanation:

A telescopic cylinder, also known as a multistage cylinder or a sleeve cylinder, is specifically designed to provide an extended stroke length while maintaining a compact retracted length. In contrast, a standard hydraulic cylinder typically consists of a single-stage rod and barrel design. Here are the key differences between a telescopic cylinder and a standard hydraulic cylinder:

  • Design and Structure: The most significant difference lies in the design and structure. A standard hydraulic cylinder has a single-stage design, meaning it consists of a single rod and barrel. On the other hand, a telescopic cylinder features multiple stages or sleeves nested inside one another. This nested structure allows for a longer stroke length while keeping the retracted length compact.
  • Stroke Length: The stroke length of a telescopic cylinder can be significantly longer compared to a standard hydraulic cylinder. The ability to extend in multiple stages allows for a greater overall stroke length, making telescopic cylinders suitable for applications that require extended reach or height adjustment.
  • Retracted Length: While a standard hydraulic cylinder has a fixed retracted length equal to its stroke length, a telescopic cylinder offers a compact retracted length. The nested design enables the stages to retract inside one another, reducing the overall length of the cylinder when not in use. This compact retracted length is advantageous in applications with space constraints.
  • Load Capacity: Telescopic cylinders are designed to handle substantial loads while maintaining stability. The nested structure provides increased load-bearing capacity compared to standard hydraulic cylinders. The stages distribute the load evenly, ensuring efficient load transfer throughout the extended stroke.
  • Complexity and Maintenance: Telescopic cylinders are generally more complex in design compared to standard hydraulic cylinders. They require precise alignment of the stages and may include additional components such as locking mechanisms or guiding systems. This complexity can affect maintenance requirements and may require specialized inspection and servicing procedures.
  • Application: Telescopic cylinders are commonly used in applications that require extended reach or height adjustment, such as cranes, dump trucks, aerial platforms, and material handling equipment. Standard hydraulic cylinders, on the other hand, are versatile and widely used in various applications, including industrial machinery, construction equipment, and agricultural machinery.

Despite these differences, both telescopic cylinders and standard hydraulic cylinders are essential components in hydraulic systems. They both rely on hydraulic fluid to generate force and provide linear motion. The selection of the cylinder type depends on the specific requirements of the application, including stroke length, retracted length, load capacity, and available space.

It’s important to consult the manufacturer’s guidelines and specifications to ensure the proper selection, installation, and maintenance of the hydraulic cylinder based on the specific application requirements.

China manufacturer Hot Selling Popular Size OEM Telescopic Hydraulic Cylinder for Dump Trailer   manufacturer China manufacturer Hot Selling Popular Size OEM Telescopic Hydraulic Cylinder for Dump Trailer   manufacturer
editor by Dream 2024-05-16