Product description:

Hydraulic cylinders are actuators that convert hydraulic energy into linear mechanical force. They have a compact structure, high output force, and smooth operation. They are the core components for performing actions such as pushing, pulling, lifting, and pressing in various mechanical and industrial systems, and are widely used in construction machinery, metallurgy, mining, shipping, and other fields.

A swing cylinder is an essential hydraulic component widely used in excavators, cranes, forestry equipment, and material handling machinery. It is designed to control the swing or rotation movement of machine parts, such as the upper structure of an excavator or the working arm of specialized machinery. By converting hydraulic energy into rotational or linear motion, the swing cylinder ensures precise and powerful movement control, allowing equipment to operate efficiently and safely under demanding conditions.

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Structure and Working Principle

The swing cylinder consists of a cylinder barrel, piston, piston rod, seals, bearings, and mounting ends. When pressurized hydraulic oil flows into the cylinder chamber, it pushes the piston to move linearly. This motion is transmitted through a mechanical linkage or swing arm, producing a controlled rotation or swinging action.

The cylinder enables smooth, stable, and accurate control of swing angles — a critical function in excavators and other machinery that require precise positioning. Its robust construction and high-pressure design allow it to handle heavy loads, shock impacts, and continuous operation without compromising performance.

Materials and Manufacturing Process

The cylinder barrel is made from high-strength alloy steel, precision honed to achieve a smooth internal surface that minimizes seal wear and extends service life. The piston rod is hard chrome plated or QPQ-treated, providing excellent resistance to corrosion, abrasion, and impact.

Advanced CNC machining, robotic welding, and heat treatment processes are used to ensure perfect dimensional accuracy and mechanical strength. The entire production process follows strict quality standards to guarantee that each swing cylinder meets the highest performance and safety requirements.

All critical components — including seals, guide rings, and bearings — are carefully selected from trusted global brands to ensure maximum reliability in harsh operating environments.

Key Features and Advantages

High Working Pressure: Capable of operating under pressures up to 35 MPa or more, ensuring strong torque output and stability.

Precision Control: Provides smooth and accurate swing motion, improving equipment performance and operator control.

Excellent Sealing System: Equipped with advanced seals from brands like NOK, Hallite, or Parker, preventing oil leakage and contamination.

Durable and Reliable: Made from premium alloy steel with superior surface treatment to resist wear, corrosion, and fatigue.

Customizable Design: Available in various bore sizes, stroke lengths, and mounting configurations to suit different equipment models.

Easy Maintenance: Simple structure and replaceable components make inspection, repair, and seal replacement fast and convenient.

Working principle of hydraulic cylinder:

Applications:

The hydraulic cylinder is an energy conversion device that converts hydraulic energy into mechanical energy. It is the core executive component in the hydraulic system. The hydraulic cylinder uses hydraulic oil to drive the piston to move, converting hydraulic energy into linear reciprocating motion. When the hydraulic oil enters the cylinder barrel, it pushes the piston rod to extend or retract, completing the predetermined action. The direction and speed of its movement are regulated by the hydraulic control system. The hydraulic cylinder consists of a cylinder barrel, cylinder cover, piston and piston rod, sealing device, and buffering device. According to its structure, it can be classified as piston type, plunger type, multi-stage telescopic sleeve type, and gear rack type. Hydraulic cylinders are widely used in machine tools, construction machinery, vehicles, and other fields, featuring a simple structure and smooth movement.

Swing cylinders are widely used in various heavy machinery applications, including:

Excavators and backhoes – to control the swing motion of the upper structure or boom arm.

Cranes and loaders – for rotation and alignment of lifting arms or platforms.

Forestry and agricultural machines – to power hydraulic swing arms and attachments.

Marine and mining equipment – for directional control, rotation, or lifting operations.

In each of these applications, the swing cylinder provides stable, controlled motion and ensures optimal machine performance even in extreme environments.

Quality Control and Testing

Every swing cylinder undergoes strict quality control and performance testing before leaving the factory. Typical tests include:

Hydraulic pressure and leakage tests

Dimensional accuracy and surface roughness inspection

Coating adhesion and corrosion resistance tests

Fatigue and endurance testing under heavy load

These comprehensive tests guarantee exceptional durability, safety, and performance in real-world working conditions.

Company profile:

Since its establishment in 2014, Wuxi Hengxin Zhicheng Co., Ltd. has rapidly grown into a leading enterprise in the steel manufacturing industry. We focus on the research, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders, and are committed to providing customers with high-quality, customizable products that fully meet diverse application needs.

Our products are exported to global markets such as the Middle East, South America, Africa, and Southeast Asia, and are highly trusted by large purchasers and customers in the steel industry. We always prioritize quality, reliability and customer service, and attach great importance to establishing long-term and stable cooperative relationships with customers. We provide each customer with tailor-made solutions.

We continuously promote technological innovation and improve service capabilities and production efficiency. Through an efficient online platform, you can browse our best-selling products at any time and communicate with the sales and support teams in real time to conveniently obtain the information you need. We sincerely invite partners from all countries to visit, exchange and provide guidance, and jointly explore more possible cooperation opportunities!

Certification:

Packaging and Transportation:

【Package standard】

We use steel bands to tightly package the products into hexagonal bundles. The structure is stable and not prone to deformation. Each bundle is equipped with two high-strength nylon straps to ensure the safety and convenience of the lifting operation.

To meet various maritime transportation needs, we offer a range of customized packaging options, including full coverage with oilcloth, moisture-proof wooden boxes, and high-strength protective frame packaging, to ensure the maximum safety of goods during transportation.

【Guarantee for transportation】

We offer 20-foot and 40-foot standard container transportation services. Each container can carry up to 25 tons of goods and we can accept trial orders with a minimum of 5 tons. This allows for flexible adaptation to your purchasing scale. All packaging complies with maritime shipping standards to ensure that the goods are delivered to the destination efficiently and safely.

Why us?

We focus on the research, development, production and sales of seamless steel pipes, special-shaped steel pipes and hydraulic cylinders. We have a complete production chain and an advanced equipment system, including piercing machines, cold drawing machines, hot rolling machines, high-precision flaw detection and testing equipment. The company has passed multiple authoritative certifications such as ISO9001, API, SGS, CCS, DNV, ABS, CE, RoHS, etc., ensuring that each product complies with international standards. We are committed to providing customers with high-quality, customizable solutions to meet diverse application needs.

Relying on our own built processing base and modern workshops, combined with multiple branches and storage centers across the country, we have achieved sufficient inventory and efficient logistics coordination, significantly shortening the delivery cycle and ensuring the rapid delivery of orders.

We have established a complete service and support system. After the order is signed, the professional after-sales team can provide timely and safe on-site guidance and technical support to ensure that customers are at ease throughout the process from procurement to use.

FAQ：

1. Do you support customized design and production?

Sure. We have a professional engineering team that can conduct customized design and production with special sizes, control systems or OEM according to your requirements.

2. How fast can you deliver?

In stock sizes, it takes 3-5 days. For customized sizes, it takes 30-35 days.

3. What payment methods do you support?

We support TT payment. Generally, 30% to 50% of the payment is made in advance, and the remaining amount is paid before shipment.

4. Can you provide material certification (MTC)?

Yes, we will provide MTC to you after production is completed to ensure that the material quality meets the standards.

5. What is the minimum order quantity?

Generally, we accept trial orders. The minimum order quantity is 1-3 tons, which can be determined according to different products.