Hydraulic Cylinder

Industrial Hydraulic Cylinders | Engineering & Procurement Guide

Industrial hydraulic cylinders convert fluid power into linear mechanical force across high-load actuation systems. Standard configurations include heavy-duty tie-rod models compatible with Rexroth and ISO standards for easy line integration, fully-welded heavy structural cylinders engineered for severe shock loads, and 304/316L stainless steel variants built for corrosive chemical or marine environments.

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Hydraulic Product Range

Heavy-Duty Tie Rod Cylinders

Built with four high-strength alloy steel tie rods connecting end caps. Fully interchangeable with ISO and Rexroth CD/CG series for straightforward drop-in maintenance.

Heavy-Duty Welded Cylinders

Designed for high-cycle and severe shock applications. Barrel and end caps feature full-penetration structural welds to eliminate tie-rod stretch under peak pressure spikes.

Stainless Steel Corrosion-Resistant Cylinders

Tube, end caps, and piston rods manufactured from solid 304 or 316L stainless steel. Deployed in chemical processing, food plants, and marine deck equipment.

Sub-Zero and High-Temp Specialty Cylinders

Configured with specialized elastomer seals supporting operating windows from -40 degrees C to +180 degrees C for cold storage facilities or steel mills.

Selection Parameters Table

Technical Parameter	Standard Specification Range	Custom Engineering Limits
Bore Diameter	40 mm to 400 mm	Up to 600 mm
Rod Diameter	25 mm to 280 mm	Custom stepped or hollow rods available
Max Stroke Length	Up to 3,000 mm	Up to 6,000 mm
Rated Working Pressure	16 MPa to 25 MPa (Standard)	Up to 35 MPa (High-pressure series)
Operating Temperature	-20 degrees C to +80 degrees C (Standard NBR)	-40 degrees C to +180 degrees C (Fluororubber and Special seals)
Mounting Styles	Clevis, Trunnion, Flange (ISO/JIC)	Custom pin configurations and integrated manifolds
Piston Rod Treatment	Hard chrome plating (Layer thickness: 20 to 30 um; Surface hardness: HV850 to 1000)	Nickel-chromium plating and Quenched alloy steel

Applications

Hydraulic Press and Stamping Lines

Delivering stable, high-tonnage linear force for metal forming, powder metallurgy, and rubber vulcanization presses.

Construction and Mobile Equipment

Stabilizing mobile cranes, excavators, and drilling rigs through high-load outrigger cylinders operating under dynamic side-load conditions.

Tie Rod Type Hydraulic Cylinder suppliers

Marine and Offshore Engineering

Operating hatch covers, steering gear, and crane booms exposed to saltwater spray and high humidity.

Quality Control Before Shipment

Dimensional and Geometric Inspection: Coordinate Measuring Machines (CMM) and laser interferometers verify bore concentricity, stroke tolerance, and mounting pin center-to-center distances against customer CAD drawings.

Pressure and Leakage Testing: Every individual cylinder undergoes 1.5x rated working pressure hydrostatic shell testing and low-pressure pneumatic seat testing to ensure zero internal bypass across the piston seals and zero external leakage at rod glands.

Surface Coating Verification: Piston rod chrome plating layers are tested using magnetic thickness gauges and 72-hour neutral salt spray (NSS) testing to confirm corrosion resistance before assembly.

Custom Hydraulic Components and Systems

OEM projects requiring unique installation envelopes or non-standard port orientations can be engineered directly from STEP/IGES CAD models or engineering specifications.

Integrated Manifold Blocks

Direct-mounting counterbalance valves, proportional valves, or logic elements onto the cylinder end cap to minimize external hosing and pressure drops.

Position-Feedback Integration

Integration of internal magnetostrictive linear transducers or external linear variable differential transformers (LVDTs) for closed-loop motion control.

Damping Configuration

Adjustable or fixed cushioning at stroke ends to absorb kinetic energy and eliminate mechanical shock impact on cylinder caps.

FAQ

Q: How do I select between a tie-rod cylinder and a welded cylinder for my application?

A: Tie-rod cylinders are standard for factory automation and general industrial machinery where easy maintenance and standard ISO mounting dimensions are required. Welded cylinders feature a compact profile and higher structural rigidity against continuous shock loads and vibration, making them the preferred choice for mobile machinery and heavy construction equipment.

Q: What standard materials are used for piston rods, and what surface treatments are applied?

A: Standard piston rods are machined from medium-carbon alloy steel (such as 45# or 42CrMo), induction-hardened, and hard chrome-plated to a thickness of 20 to 30 um with a surface hardness of HV850 to 1000. For corrosive environments, solid stainless steel (304 or 316L) or nickel-chromium plated rods are specified.

Q: What is your standard testing protocol before a cylinder leaves the factory?

A: All units undergo 100 percent factory testing, including pressure containment tests at 1.5 times the maximum working pressure, functional stroke cycling, and zero-leakage verification for both static seals and dynamic rod seals. Test certificates can be supplied with the shipment.

Q: Can you manufacture hydraulic cylinders according to our custom drawings or physical samples?

A: Yes. Over 60 percent of production supports OEM/ODM specifications. Engineering teams review custom CAD files, operating pressures, cycle frequencies, and mounting interfaces to deliver drop-in replacements or custom actuation systems.

Q: What seal brands do you use, and how do you handle extreme temperatures?

A: Standard seals utilize imported Parker, Hallite, or NOK polyurethane (PU) and NBR combinations. For low-temperature environments down to -40 degrees C or high-temperature industrial furnaces up to +180 degrees C, specialized fluorocarbon (Viton) or PTFE compound seals are installed.

Q: What is the typical lead time for custom hydraulic cylinder samples and bulk orders?

A: Standard custom sample manufacturing requires 15 to 25 days depending on material availability and forging schedules. Volume production orders typically ship within 30 to 45 days following engineering drawing sign-off.

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