Custom Hydraulic Cylinders for Steel Mills, Heavy Equipment, Hydraulic Press Manufacturing

Large Bore Cylinders for Steel Mills, Hydraulic Press Manufacturing, Construction, and Offshore Industries

Our clients include the world’s top steel mills, such as POSCO Steel, Dongkuk Steel, Nippon Steel Corporation, and JFE Steel Corporation. Moreover, we are regular suppliers to heavy equipment, shipbuilding, and marine engineering companies such as Hyundai Heavy Industries and IHI Corporation.

We manufacture custom hydraulic cylinders for the following industries:

• Steel Manufacturing | Hot Rolling Mills and Cold Rolling Mills
• Hydraulic Press Manufacturing | Main Press Cylinders for Heavy Load Press Machines
• Heavy Equipment Manufacturing | Hydraulic Power for Mining, Marine & Offshore, Oil & Gas, Agriculture

Scroll down to explore our large bore cylinders by your application and industry.

Steel Manufacturing | Hot Rolling Mills and Cold Rolling Mills

As a primary supplier to the world’s largest steel manufacturers, our hydraulic and pneumatic cylinders are used at every step of the steel manufacturing industry. Our steel manufacturing clients include POSCO, Dongkuk Steel, Nippon Steel, and JFE Steel Corporations.

Hot Rolling Mills

Molten Steel Handling

Our ladle turret cylinders are used to handle molten steel between melting and casting processes. We manufacture all our cylinders with forged steel. They are designed to withstand the harsh environments and extreme temperatures at steel mills. As an example, our custom ladle turret cylinders for POSCO have the following specifications:

• Bore size: 34 inches
• Rod diameter: 31.5 inches
• Stroke length: 33.1 inches
• Working pressure 2,900 PSI

Continuous Casting Machines (CCM)

We manufacture mold oscillating cylinders and pusher cylinders that help adjust and form long steel products, such as slabs and blooms. Our mold oscillating cylinders are manufactured with forged steel. They are heat-treated for superior strength and resistance to physical and thermal damage. In addition, we also offer chrome and ceramic rod plating for extra wear resistance.

• Bore size: 15 inches
• Rod diameter: 11 inches
• Stroke length: 29.5 inches
• Working pressure: 2,030 PSI

Hot Rolling

LPR Global supplies Heavy Duty Automatic Gauge Control (AGC) Cylinders (also known as Roll Force Cylinders) for hot rolling mills. For example, the pictured cylinders are used by Hyundai Heavy Industries to help push hot rolling mill rolls to flatten steel slabs in gradual increments into the desired thickness.

Accuracy, precision, and resistance to heavy loads and harsh conditions are all top priorities when designing custom AGC Cylinders for our client. Our AGC Cylinders for Hyundai’s hot rolling mills were manufactured with the following specifications:

• Bore size: 41.3 inches
• Rod diameter: 35.4 inches
• Stroke length: 12.2 inches
• Working pressure: 4,500 PSI

For superior resistance to heat and pressure, we exclusively manufacture our custom hydraulic cylinders with forged steel. As additional options, we offer hardened steel, aluminum, and specialty body materials, as well as chrome or nickel plating.

For large temper mills or skin pass mills, we also manufacture Push-Up Cylinders. Our custom push-up cylinders for JFE Steel Mill have the following specifications:

• Bore size: 25.2 inches
• Rod diameter: 20.9 inches
• Stroke length: 8.9 inches
• Working pressure: 3,550 PSI

Workholding

We manufacture pneumatic and hydraulic Clamp Cylinders for steel mills’ workholding needs. Our large bore, high-pressure clamp cylinder for POSCO have the following specifications:

• Bore size: 13.8 inches
• Piston diameter: 7.9 inches
• Stroke length: 9 inches
• Working pressure: 2,900 PSI

Cold Rolling Mills

Coil Cars

LPR Global’s Welded Cylinders are supplied to POSCO’s high-volume coil processing plants in South Korea. Our welded coil car cylinders have the following specifications:

• Bore size: 9.8 inches
• Piston diameter: 5.5 inches
• Stroke length: 16.1 inches
• Working Pressure 3,050 PSI

Uncoilers and Recoilers

Our Custom Rotary Cylinders are used in recoilers and uncoilers in cold coil processing lines. While custom designed, all our cylinders are manufactured for large volumes and heavy loads in high production mills. For example, our custom rotary cylinders for POSCO Steel Mills:

• Bore size: 11.8 inches
• Rod diameter: 4.4 inches
• Stroke length: 6.9 inches
• Working pressure: 1,450 PSI
• Line speed: 984 feet per minute
• Rotational speed: 852 RPM

Galvanizing Pot

Further down the cold mill line, our Lifting Cylinders and Custom Hydraulic Systems are used to the galvanizing pot in continuous galvanizing lines (CGL) in high volume cold mills.

• Bore size: 31.5 inches
• Stroke length: 79.1 inches

Hydraulic Press Manufacturing | Main Press Cylinders for Heavy Load Press Machines

We manufacture main cylinders for hydraulic press machines with capacities from 30 tons to 10,000 tons. Specifically, we specialize in hydraulic cylinders for press machines with over 300-ton capacities. Our portfolio includes main cylinder projects for forging press, stamping press, guillotine press, filter press, and baler press machines.

Moreover, we also supply counterbalancing pneumatic cylinders to shipbuilding, marine, and offshore manufacturers. For instance, our top clients include Hyundai Heavy Industries and IHI Corporation, who use our counterbalancing cylinders for their hydraulic press machines.

• Bore size: 39.4 inches
• Rod diameter: 33.5 inches
• Stroke length: 98.4 inches
• Working pressure: 4,500 PSI

• Bore size: 25.6 inches
• Rod diameter: 3.9 inches
• Stroke length: 98.4 inches
• Working pressure: 100 PSI

• Bore size: 44 inches
• Rod diameter: 4.7 inches
• Stroke length: 50.3 inches
• Working pressure: 115 PSI

Heavy Equipment Manufacturing | Hydraulic Power for Mining, Marine & Offshore, Oil & Gas, Agriculture

Marine Crane Hydraulic Lift Cylinders

As heavy-duty hydraulic cylinder specialists, we also manufacture hydraulic lift cylinders for marine cranes. Chrome plating for corrosion resistance and all quality control testing is done in-house.

The cylinders below were reverse-engineered and manufactured for Korea East-WestPower Company. The client originally worked with a Germany supplier, but required emergency repair services. LPR Global reverse engineered the cylinder for repair and manufactured a duplicate new cylinder.

Since the original repair, we have been the main supplier of marine hydraulic lift cylinders to the Korea East-West Power Company:

• Bore Size: 27.6 in / 700 mm
• Rod diameter: 14.2 in / 360 mm
• Stroke Length: 57.3 in / 4,155 mm

Marine Coal Transportation

Our custom boom cylinder is used by South Korea’s top electricity supplier in their power plant. The boom cylinder provides the hydraulic power for their Continuous Ship Unloader (CSU) in harsh marine conditions.

• Bore size: 27.6 inches
• Rod diameter: 14.2 inches
• Stroke length: 4,163.6 inches
• Working pressure: 4,640 PSI

Offshore Infrastructure Construction

Our custom 800-ton Cylinder Jacks were manufactured for a government infrastructure project for a bridge-tunnel between Korea’s mainland and island cities. The Cylinder Jacks helped uphold and adjust tunnel ceilings and walls during construction under the ocean floor. As such, our custom hydraulic cylinders are resistant to the extreme loads, pressure, and conditions of the underground construction.

• Bore size: 25.6 inches
• Piston diameter: 23.2 inches
• Stroke length: 31.5 inches
• Working pressure: 3,480 PSI

Drilling & Mining

Finally, we are regular suppliers of choke cylinders to clients in the mining industry. Our choke cylinders are used in hammer drills as the main source of hydraulic power to break through the Earth’s surface.

Custom Design & Engineering

In addition to manufacturing to print, our cylinder job shop has custom design and engineering capabilities. If provided with basic or incomplete drawings, our in-house engineers will prepare additional drawings to supplement your designs.

All our designs and drawings are submitted for client approval before production begins.

3-Step Hydraulic Cylinder Testing Process

Our custom cylinders undergo a standard 3-part testing procedure before being shipped to our clients.

1. Function Test

The purpose of the function test is to assess for abnormal or substandard cylinder performance. Custom hydraulic or pneumatic cylinders are placed on a test jig that measures the cylinders’ full strokes over several cycles. Our cylinders are only approved for the next test if the stroke performance is satisfactory over all cycles.

2. Proof Test

After the function test, our custom-made cylinders undergo a proof pressure test to check for leakage or deformation under pressure. Single-acting hydraulic cylinders are tested in their fully extended state. Meanwhile, double-acting hydraulic cylinders are tested in both extended and retracted states. We have the capacity to test up to 8700 PSI with our in-house testing equipment for expedited lead times.

3. Internal Bypass Test

Finally, all our double acting cylinders undergo an internal bypass test to check for leakage.

Our cylinders are only shipped to clients once they satisfy all 3 stages of our testing process.

Manufacturing Capabilities & Equipment

Custom hydraulic cylinders are our bread-and-butter. We offer full flexibility with design specifications, including body material, rod plating, mounting, and control & adjustable features, such as position sensors, bumpers/cushions, and brakes.

Most Commonly Requested Steel Standards

In addition to these standards, we can accommodate your preferred material.

Full In-House Manufacturing and Testing

We handle the complete manufacturing process – from design engineering to manufacturing to testing – in our vertically integrated job shop. Certainly, both our manufacturing and assembly facilities are certified to ISO 9001:2015 and ISO 14001:2015 standards.

Our plant is fully equipped with manufacturing and testing equipment, including several lathes, mills, radial machines, TIG welders, test machines, precision gauges, a 50-feet overhead crane with a 50-ton capacity, and more.

For a full list of main manufacturing equipment, please see our job shop overview.

Business Case: Custom Hydraulic Cylinder Jack for Heavy Ship Lift

Custom Marine Hydraulics Manufacturing for U.S. Heavy Ship Lift Leader.

PDF available at the bottom of the tab.

Background: Need for Expert, Reliable Supplier during COVID

When a U.S.-based leader in heavy ship lift systems designed a new lift system, they needed a partner with expertise in both marine hydraulics and heavy duty hydraulic cylinder manufacturing.

The client had previously worked with a Chinese supplier, but they were looking for new partner with greater design & engineering capabilities and superior cylinder performance. It was also a priority to a partner with consistent reliability and lead times during COVID.

The heavy ship lift client compared several global cylinder manufacturers to select a partner that fit their demanding requirements. Ultimately, they selected LPR Global’s cylinder job shop for our expertise in custom engineering for specific applications, our competitive pricing, and our reliable lead times.

Challenges of Marine Hydraulics Project

1. Manufacturing to Exact Specifications for Custom Project

Our client’s heavy ship lift system had an innovative design that required custom cylinder jack manufactured to exact-fit. Since it was a new design, it was mandatory that their new cylinder manufacturer had excellent design engineering capabilities, as well as superior manufacturing quality.

2. Heavy Duty Cylinder Reliability

Our client’s marine hydraulic system was being developed for commercial shipyards, loading systems, and offshore platforms. Performance under heavy loads and pressures were critical priorities – not just for our client’s operations, but for the industries and safety of the ships they served.

3. Marine Hydraulics Environmental Exposure

Cylinders for marine & offshore applications must bear some of the toughest environments, including extreme temperatures and constant exposure to wind, salt, water, and dirt. In other words, marine hydraulics must be resistant to corrosive elements.

Additionally, marine hydraulic cylinders must withstand both internal pressures and external pressures from circumstances, such as underwater operation. As a result, marine hydraulics are one of the most difficult and heavy duty hydraulic cylinder applications to manufacture.

LPR Global Solutions: Application-Based Custom Cylinder Manufacturing

1. Experience & Expertise in Custom Manufacturing

Our U.S.-based ship lift client chose our cylinder job shop over competitors because we are a recognized leader in custom heavy duty hydraulic cylinder manufacturing. We have superior ability to manufacture each cylinder to exact fit, according to custom drawings or specifications. Moreover, our in-house engineers collaborate with our client’s engineers to design a cylinder jack with optimal performance and service life for the specific operating conditions.

For this ship lift project, LPR Global’s engineers took a dedicated marine approach and suggested specialized plating techniques and custom seal structures that went beyond the standard options. These suggestions were made to extend the service life and durability of our client’s hydraulic cylinder jack in marine conditions.

2. Long-Term Partnerships, Collaborative Engineering

Our job shop maintains long-term partnerships with global leaders in marine hydraulics, engineering, and shipbuilding, including Hyundai Heavy Industries and Daewoo Shipbuilding & Marine Engineering.

These partnerships are built on ongoing collaboration between our engineers and our clients’ engineering team, as well as our reliable cylinder manufacturing. Our global clients depend on our job shop for superior cylinder manufacturing and performance diverse, demanding, and high-stakes operating conditions.

3. Rigorous Cylinder Testing for Performance Under Pressure

Our custom hydraulic cylinders must undergo our 3-part testing process before shipment. Since these marine cylinder jacks were manufactured for our client’s extreme conditions, they underwent an elevated internal pressure test at 350 bar (5,075 PSI) for 1 hour.

Custom Hydraulic Cylinder Jack

The resulting cylinder jack is the hydraulic power source for our client’s ship lift systems, which lift loads of over 30,000 metric tons.

Our client also adopted our plating suggestions. The custom cylinder jack was prepared with 2 layers of 50-micron chrome plating. This extra plating allowed for superior resistance to corrosion in marine and offshore conditions.

Conclusion

With design engineering input from both teams, the client now supplies their commercial ship lift with improved reliability, efficiency, and operating costs for their marine clients. Our client continues to provide their ship lift systems to shipyards, offshore platforms, and commercial ports.

LPR Global’s custom marine hydraulics projects also include:

27.6” Large Bore Boom Hoist Cylinder

Korea East-West Power Company,

Continuous Ship Unloader (CSU)

800-Ton Hydraulic Cylinder Jack

Daewoo Engineering & Construction,

Busan-Geoje Fixed Link

Browse our large bore and heavy duty hydraulic cylinder projects by industry and application.

We are happy to manufacture custom cylinders to exact fit, even in small order volumes. Fill our your custom specifications or send us your drawings for prices and lead times.

Custom Hydraulic Cylinder Jack for Heavy Ship Lift Business Case

Business Case: Hydraulic Press Cylinder for Custom Press Manufacturers

PDF available at the bottom of the tab.

Replacement Hydraulic Press Cylinder

As a Tier 1 vendor to POSCO Steel, our custom cylinder supplier relationship with the leading steelmaker began with a single order for replacement hydraulic cylinders.

At the time, the global steel producer worked with a German supplier whose lead time was 6-10 months. During an emergency, POSCO reached out to our Korean manufacturer for hydraulic press cylinders. We manufactured the replacement hydraulic cylinders with significant lead time reduction.

Since then, clients like POSCO and Hyundai Steel have been choosing our cylinders over German, U.S., and Italian suppliers for our price and lead time advantages.

Long-Term Advantages of LPR Global Custom Hydraulic Cylinders

Initially, the client was attracted to our short lead time, competitive pricing, and prompt aftersales support. After purchasing and installing our LPR Global’s replacement hydraulic cylinders, high manufacturing quality became a top reason for the ongoing partnership.

In-House Design Engineering

In addition to manufacturing to print, LPR Global also provides in-house design engineering of hydraulic cylinders for custom press manufacturers. With basic parameters such as stroke length, operating pressure, and operation/application conditions, our in-house engineers will create full drawings and specifications for your custom hydraulic press cylinder.

Notable Repeat Clients

Since our first replacement order in 2016, POSCO Steel has been a repeat client for our custom hydraulic press cylinders.

They benefit from the wide array of auxiliary options, including:

• Depth control
• Pressure reversal
• Position sensing

Hitachi Zosen Corporation (HITZ) and a U.S. Marine Engineering Firm are amongst our notable repeat clients for hydraulic press cylinders. We have been fulfilling repeat cylinder orders of 21-in. (532 mm) for Hitachi Zosen and 14-in. (350 mm) large bore cylinders for the U.S. Marine Firm for several years.

Hydraulic Press Cylinder Specification Ranges

From a single hydraulic press cylinder to several dozens of cylinders, we manufacture any order quantity for our OEM clients.

Our heavy-duty cylinders are used in hydraulic press machines of up to 10,000-ton capacities. Our typical cylinder fluids include VG46 mineral-based hydraulic oil (high performance oil), water glycol, and bio-based hydraulic oils, and we can accommodate to our clients’ specific requests.

Our typical hydraulic press cylinder falls within the following range:

Imperial Units

• Bore Size (Inner Diameter): 11 inches to 28 inches
• Stroke Length: 3 ft to 36 ft
• Operating Pressure: Up to 5,000 PSI

Metric Units

• Bore Size (Inner Diameter): 300 mm to 700 mm
• Stroke Length: 1 m to 11 m
• Operating Pressure: Up to 350 bar

Chrome and Nickel Plating for Corrosion and Heat Resistance

We offer chrome plating for corrosion resistance, as well as nickel and ceramic plating for heat and corrosion resistance.

Our custom hydraulic press clients typically request chrome plating, or nickel-chrome plating, to a thickness of 30 µm – 50 µm.

Our plating is included in our rigorous quality control process to ensure the highest quality cylinders for our clients’ demanding applications.

Heavy-Duty Application-Based Experience

Custom hydraulic press manufacturers have been a primary client base since LPR Global began manufacturing heavy-duty hydraulic cylinder in 2014. Since then, we have established ourselves as a top supplier for hydraulic press cylinders for OEMs specializing in baler machines, filter press, metal scrap press, hydroform and hydraulic forging press machines.

Our OEM clients serve a variety of end-user press manufacturers in the shipbuilding, metal recycling, wastewater treatment, automotive, and steel mill industries. Browse our large bore and heavy duty hydraulic cylinder projects by industry and application.

In addition to custom heavy-duty hydraulic cylinders, we also provide Counterbalancing Air Cylinders and Hydraulic Power Units (HPUs) upon request.

Hydraulic Press Cylinder Custom Press Manufacturers Business Case

Hydraulic Cylinders for Agricultural, Construction Equipment, Forklift, Lifts, Cranes, and Other Machinery

Construction Cylinder Solutions Brochure

LPR Global’s dedication, and specialty for hydraulic cylinders with 30 years of experience and expertise that built our long-term support and relationship with our clients.

We strive to provide zero-defect rate, top tier quality and price competitiveness, and prompt technical services.

From 40 mm to 500 mm in Bore Size, we provide cylinders with maximum Stroke Length of 5,500 that can perform up to 5,690 psi in Operating Pressure.

With a production capacity of 25,000 cylinders monthly, we also provide custom manufacture to fit the user’s requirements

All of our major clients are long-term base with return orders, including Doosan, Hyundai in Korea; Genie, CNH Industrial in USA; IHI, Hitachi, Komatsu in Japan; Brand, Viking West in Canada, JCB in England, TRT in New Zealand, and more.

Scroll down to browse examples of our custom cylinder projects, or fill out your own specifications for a quotation.

Application: Agricultural Machinery

Application: Industrial Machinery

Outrigger Cylinders

Applications: Excavator, Front & Skid Loader, Backhoe, Aerial Platforms, Lifts, Trailers

Our project reference for Outrigger Cylinders ranges as follows:

• Bore Size: 2.95 inches (75 mm) to 5.12 inches (130 mm)
• Stroke Length: 12.4 inches (315 mm) to 29.72 inches (755 mm)
• Operating Pressure: 1,170 PSI to 4,700 PSI

Bucket Cylinders

Applications: Excavator, Front & Skid Loader, Backhoe

Our project reference for Bucket Cylinders ranges as follows:

• Bore Size: 2.36 inches (60 mm) to 35.43 inches (900 mm)
• Stroke Length: 11.02 inches (280 mm) to 25.98 inches (660 mm)
• Operating Pressure: 2,555 PSI to 3,980 PSI

Boom Cylinders

Applications: Excavator, Front & Skid Loader, Backhoe

Our project reference for Boom Cylinders ranges as follows:

• Bore Size: 2.36 inches (60 mm) to 4.02 inches (102 mm)
• Stroke Length: 11.02 inches (280 mm) to 79.72 inches (2,025 mm)
• Operating Pressure: 2,555 PSI to 3,980 PSI

Lift Cylinders

Applications: Forklifts (Primary, Lower, Upper, Infeed, Boom)

Our project reference for Lift Cylinders ranges as follows:

• Bore Size: 2.56 inches (65 mm) to 4.33 inches (110 mm)
• Stroke Length: 14.57 inches (370 mm) to 79.72 inches (2025 mm)
• Operating Pressure: 2,105 PSI to 4,000 PSI

Clients