

We can produce and custom Excavators Hydraulic Cylinders, as follow:
- Boom Cylinder: Raises and lowers the main arm (boom).
- Stick Cylinder: Controls the movement of the secondary arm (stick) for reach.
- Bucket Cylinder: Tilts the bucket for digging, scooping, or dumping.
- Auxiliary Cylinders: Operate additional attachments like grapples, breakers, or augers.
Key Components of Hydraulic Cylinders
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Cylinder Barrel:
- Houses the piston and contains pressurized hydraulic fluid.
- Made of durable materials like high-strength steel.
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Piston:
- Divides the cylinder into two chambers: rod-side and cap-side.
- Moves under hydraulic pressure to perform the desired action.
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Piston Rod:
- Extends out of the cylinder to transfer motion to the excavator's mechanical linkage.
- Coated with materials (e.g., chrome) for corrosion resistance and durability.
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Seals:
- Prevent fluid leakage and contamination.
- Ensure smooth and efficient operation.
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End Caps:
- Close the cylinder and provide ports for hydraulic fluid entry and exit.
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Ports:
- Allow hydraulic fluid to flow into and out of the cylinder.
Advantages of Hydraulic Cylinders in Excavators
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High Force Output:
- Capable of lifting and moving heavy loads.
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Precision:
- Provides controlled and smooth motion for precise operations.
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Durability:
- Designed to handle harsh environments and resist wear.
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Compact Design:
- Produces significant force in a relatively small form factor.
Types of Hydraulic Cylinders Used in Excavators
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Single-Acting Cylinder:
- Pushes the piston in one direction using hydraulic pressure; gravity or external force returns it.
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Double-Acting Cylinder:
- Pushes and pulls the piston using hydraulic pressure on both sides.
- Most commonly used in excavators for bidirectional motion.
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Telescopic Cylinder:
- Extends in multiple stages for greater reach, though less common in standard excavator setups.
Key Considerations for Hydraulic Cylinders in Excavators
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Load Capacity:
- Must handle the specific weight and stress of the application.
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Stroke Length:
- Determines the cylinder's range of motion.
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Operating Pressure:
- Designed to withstand the hydraulic system's pressure, typically ranging between 2,000–5,000 PSI.
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Material and Coatings:
- Resistant to corrosion, abrasion, and wear.
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Seal Quality:
- Ensures longevity and prevents leakage in demanding conditions.
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Maintenance:
- Regular inspection and lubrication for optimal performance.
Common Problems and Solutions
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Leaks:
- Caused by worn seals or damage; replace seals promptly.
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Bent Piston Rod:
- Results from overloading or misalignment; ensure proper operation and alignment.
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Contamination:
- Dirt or debris in hydraulic fluid; maintain clean systems and replace filters regularly.
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Overheating:
- Caused by prolonged usage or system inefficiencies; monitor fluid temperature and system pressure.

Hydraulic cylinders have a variety of structural forms, and there are many ways to categorize them as follows: According to the movement can be divided into linear reciprocating motion and rotary swing type. According to the hydraulic pressure can be divided into single-acting type, double-acting type. According to the structural form can be divided into piston, piston, multi-stage retractable sleeve, rack and pinion. According to the installation can be divided into tie rods, lugs, feet, hinged shafts. According to the pressure can be divided into 16Mpa, 25Mpa, 31.5Mpa and so on.
Hydraulic cylinders can be used individually, in combination of two or more, and can also be combined with other institutions to accomplish special functions. Based on simple structure and reliable work performance, it is widely used in the hydraulic system of various machines, such as hydraulic cylinder for dump trucks and tip lorry, multi-stage hydraulic cylinder, engineering machinery cylinder, piston cylinder, press cylinder, large tonnage hydraulic cylinder, sanitation equipment cylinder, mining machinery cylinder, agricultural machinery cylinder, oil press cylinder, metallurgical hydraulic cylinder, elevator cylinder, ship hydraulic cylinder, large caliber hydraulic cylinder, steering cylinder, etc. Our factory can custom and produce various hydraulic cylinder with good quality, over 20 years experience.


Cylinder Process Flow Chart:
