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Crane Hydraulic Cylinder Wholesale
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Construction Hydraulic Cylinders

Crane Hydraulic Cylinder

Many innovative technologies
Crane requires high safety performance, and frequent operation during operation, especially shock and vibration, thus require high reliability. At the same time, the limit condition bears a large side load and has higher requirements on the hardness and wear resistance of the rod surface. Standardized design, applications of welding, anti-loosening, and other patent technology make our cylinders more reliable.

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Overview

Features
1.  Anti-leakage patent technology is adopted to improve the sealing performance;
2. The application of lightweight technology makes the main engine more energy efficient;
3.  The waterproof patent technology of the pumping cylinder can prevent the emulsification of hydraulic oil;
4.  The sleeve technology of the support cylinder improves the capacity to resist eccentric greatly.

Parameters

Item

Value

Unit

Scope of application

Bore diameter

40 - 620

mm

Crane of 1-4000 Tons

Rod diameter

25 - 535

mm

Stroke

30 - 15875

mm

Working pressure

10 - 42

MPa

Output force

Push

≤ 9656

KN

Pull

≤ 3674

KN

Working pressure

-40 - 100

℃

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Jiangsu Hengcai Hydraulic Mechanical Co., Ltd.
As China Crane Hydraulic Cylinder Manufacturers and Crane Hydraulic Cylinder Factory, Jiangsu Hengcai Hydraulic Mechanical Co., Ltd. was founded in 1988, focusing on the research and manufacturing of hydraulic cylinders. The manufacturing facility is located in Jianhu County, Yancheng City, Jiangsu Province, which faces Dafeng port in the east, neighbors Xuzhou in the west, borders Nantong in the south, and connects Lianyungang in the north. Xichang railway crosses our city; 204 National Road, Yanhai Highway, Yanxu Highway, and Ningjing Highway are all available. Only 70 kilometers from Yancheng Nanyang International Airport, convenient traffic lays a good foundation for our rapid development!

The company covers an area of 130000 square meters and has more than 200 employees. It was named a national high-tech enterprise and Jiangsu province model enterprise on management. The company has gained the certificates of ISO9001, ISO14001, and CE and has a good record of enterprise operation.
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Crane Hydraulic Cylinder Industry knowledge

Jiangsu Hengcai Hydraulic Mechanical Co., Ltd. is a Crane Hydraulic Cylinder manufacturer working from a 130,000 m² plant in Jianhu County, Yancheng City, Jiangsu Province, China. We have concentrated on hydraulic cylinder development and production since 1988, and crane duty is one of the application classes our engineering team works with most often — from 1 t truck-mounted units to 4000 t lifting systems.

Crane cylinders leave our works as standard catalogue units or as fully customized assemblies built to customer drawings and samples. Bore, rod, stroke, mounting, porting, sealing and coating are all fixed against the actual machine interface, so the cylinder arrives as a drop-in assembly rather than a generic part that has to be adapted on site.

Crane Duty Conditions We Design Around

Crane work combines frequent operation, shock and vibration, and in many linkages a limit condition where the cylinder carries a substantial side load. That combination moves the reliability question onto the rod surface, the guidance inside the bore, and the sealing package that has to hold pressure over long cycle counts.

  • Rod hardness and wear resistance — the rod surface meets side load, dust and moisture first, so heat treatment and finishing are specified for crane duty and verified by hardness and metallographic testing.
  • Anti-leakage sealing — patent sealing technology is applied across the range to keep oil in and contamination out over high cycle counts.
  • Structural security — welding and anti-loosening technology is used at critical joints so vibration during lifting duty does not work the assembly loose.
  • Lightweight design — reduced moving mass and optimised internal flow paths lower the energy the crane consumes on every stroke.
  • Waterproof pumping cylinder — our waterproof patent technology prevents water ingress from emulsifying the hydraulic oil.
  • Eccentric load capacity — sleeve technology in support cylinders increases resistance to offset loading.

Specification Envelope for Crane Service

The table below is the working envelope we manufacture against for crane hydraulic cylinders. Values are confirmed per project rather than applied as a blanket rating.

Item Range Unit Notes for crane duty
Bore diameter 40 – 620 mm Sized from required push force and permissible pressure
Rod diameter 25 – 535 mm Set by buckling length, side load and pull force
Stroke 30 – 15875 mm Long strokes for boom and luffing functions
Working pressure 10 – 42 MPa Matched to the crane’s system pressure setting
Push force ≤ 9656 kN Confirms lifting and luffing capability
Pull force ≤ 3674 kN Return and retraction duty
Operating temperature −40 – 100 °C Seal and coating selection follow the site climate
Crane capacity match 1 – 4000 t Truck-mounted to heavy lifting systems

Matching Cylinder Function to Crane Configuration

Cylinder function Typical configuration Design focus
Boom luffing / derricking Mobile, truck-mounted and deck cranes Buckling resistance at extended length, end-of-stroke cushioning, stable sealing under side load
Telescopic boom extension Truck and all-terrain cranes Multi-stage thrust, stage concentricity, seal life across repeated cycling
Outrigger and support leg Crane carriers and stabiliser beams Sleeve technology for eccentric load, holding stability under static load
Marine crane hydraulic cylinder Ship and offshore deck cranes Corrosion-resistant rod and coating systems, reliable behaviour down to −40 °C

Configuration Options We Build To

Crane cylinders are configured against the machine drawing, so the options below are selected together with the customer rather than offered as separate add-ons. Related construction cylinders we produce include the Pump Truck Hydraulic Cylinder and the wider Construction Hydraulic Cylinders range.

  • Single-stage or multi-stage construction, with double-acting thrust technology for multi-stage designs
  • Mounting style: clevis, flange, trunnion or pin-eye arrangement to suit the linkage
  • Rod-end thread, pin bore and bearing configuration
  • Port size, port position and hose routing clearance
  • End-of-stroke cushioning where the linkage needs a controlled deceleration
  • Seal compound selected for the oil grade, temperature band and contamination level
  • Rod surface treatment and external coating system, including colour and gloss
  • Identification marking, nameplate data and traceability references

Manufacturing and Quality Control Behind Each Cylinder

Cylinder production at Hengcai runs across 22 manufacturing processes and 109 processing capabilities, with a self-made parts rate of about 70%. The quality-critical processes — welding, heat treatment, electroplating and spraying — are kept in house, which is the core of our product consistency. Annual output exceeds 80,000 hydraulic cylinders, supported by a workforce of more than 200 people and a fully automated production line.

Welding quality is controlled with advanced welding processes and procedures. Heat treatment is completed on an overall tempering device or a fully automatic surface induction heating unit, then confirmed by hardness testing, tensile testing and automatic metallographic analysis. Coating runs through a 315-metre automatic electrostatic coating line, with thickness, hardness, adhesion and corrosion resistance checked by test equipment.

Cylinder performance is verified on an internationally advanced 2P-2F durability test bench and on a reciprocating and buffer comprehensive performance test bench. Our physical, chemical and metallographic laboratories verify material properties, chemical composition and dimensional accuracy. The company operates to ISO9001 and ISO14001 systems and holds CE certification, and design data is managed through a PLM platform linked to SAP for traceability from development through to sales.

Information We Use to Configure Your Solution

Project input Detail we confirm with you
Crane type and cylinder function Truck-mounted, all-terrain, marine deck, port or industrial crane; boom, telescopic, outrigger or support position
Duty and cycle profile Load spectrum, cycles per hour, operating hours per day, shock and vibration level
Hydraulic system data Working pressure within 10–42 MPa, flow rate, oil grade and filtration cleanliness
Geometry Bore, rod, stroke, closed length and mounting centres
Interfaces Pin diameter, clevis, flange or trunnion, port size and position, rod-end thread
Load conditions Push and pull force, side load direction and magnitude, holding requirement
Environment Ambient and oil temperature from −40 to 100 °C, dust, salt spray, washdown exposure
System integration Control valve, load-holding valve, cushioning requirement, sensor ports if used
Finish and marking Coating system, colour, nameplate data and traceability marking
Documentation and logistics Drawing approval route, inspection records, packaging, batch volume and delivery schedule

Installation, Commissioning and Long-Term Support

Every crane cylinder we supply is developed against a confirmed drawing set, with a defined development route from requirement confirmation through scheme review, customer approval, process design, manufacturing and final testing before order conversion. That sequence keeps the delivered cylinder aligned with the linkage it has to operate in.

  • After-sales service covering installation, commissioning and operator training
  • Technical response within 24 hours of a reported issue, with diagnosis or a detailed plan within 3 to 5 days
  • One-year warranty against material or workmanship defects under normal use, with replacement or a next-order discount as the remedy
  • Long-term spare parts supply including metal parts, pipe joints, sealing rings and rubber components
  • Round-the-clock online service support for maintenance teams

Frequently Asked Questions

What crane sizes and cylinder dimensions does Hengcai manufacture?

Our crane hydraulic cylinders serve cranes from 1 t to 4000 t capacity, with bore diameters from 40 mm to 620 mm, rod diameters from 25 mm to 535 mm and strokes from 30 mm to 15,875 mm. Working pressure runs from 10 MPa to 42 MPa, giving push force up to 9656 kN and pull force up to 3674 kN.

Can you produce cylinders to our drawings rather than a catalogue part?

Custom manufacturing is our main mode of supply. We develop and produce cylinders from customer drawings or physical samples, and we also hold standard hydraulic cylinder products for common interfaces. New development and design changes are handled by our own R&D team through a controlled process from requirement confirmation to order conversion.

How is side load and eccentric loading handled on crane cylinders?

Crane linkages often work at limit positions where offset loading cannot be avoided. Our support cylinders use sleeve technology that raises resistance to eccentric loading, and rod surfaces are produced to hardness and wear-resistance targets appropriate to crane duty, with heat treatment followed by hardness, tensile and metallographic verification.

What testing is carried out before a crane cylinder is shipped?

Cylinders are run on our 2P-2F durability test bench and on the reciprocating and buffer comprehensive performance test bench. Physical, chemical and metallographic laboratories verify material properties, chemical composition and dimensional accuracy, while welding, heat treatment and coating are inspected in house with hardness, tensile, adhesion, thickness and corrosion-resistance checks as the specification requires.

Do you supply spare parts and sealing components after delivery?

We maintain a long-term supply of cylinder accessories for every cylinder type we produce, covering metal parts, pipe joints, sealing rings and rubber components. Installation and commissioning guidance, operator training and technical response within 24 hours of a reported issue are part of the after-sales service.

What warranty applies to your crane hydraulic cylinders?

All cylinders are guaranteed free from material or workmanship defects under normal use for a period of one year. Where a cylinder develops a problem inside the warranty period, we replace it with a new unit or apply a discount on the following order, after diagnosing the issue and agreeing a plan with the customer.