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

Large Bore, Telescopic, and Mill-Duty Cylinders | Rotary Actuators | Pneumatic and Hydraulic

LPR Global’s custom hydraulic cylinders and pneumatic cylinders are for heavy-duty industrial applications and equipment. We specialize in large bore, mill-duty hydraulic cylinders with bore sizes of over 12” for hydraulic press machines and heavy equipment used in steel, offshore, civil infrastructure construction, and waste & recycling industries.

 

Our product portfolio includes press cylinders, telescopic cylinders, AGC cylinders, boom hoist cylinders, lifting cylinders, balance cylinders, and hydraulic and pneumatic rotary actuator cylinders.

 

Our custom hydraulic cylinders are known for their superior tolerance and long service life due to our manufacturing expertise and high-quality seals and packing. We are a primary supplier to high volume, high tolerance steel mills and heavy equipment manufacturers. Our clients include POSCO, Nippon Steel, Doosan, Hyundai Heavy Industries, and many more.

 

From design and engineering to in-house manufacturing at our South Korean facilities, we have the capabilities to handle all your large cylinder needs. Send us your drawings or specifications to see how we can meet and exceed your large bore cylinder needs.

Custom Large Bore Cylinders for Steel Mill, Heavy Equipment, Offshore Construction, and Mining

LPR Global is a trusted expert of custom large bore, mill-duty cylinders for the most demanding applications. Our cylinders are designed and manufactured for precision and long service life in the harshest environments – from underwater construction to mining and steel mills.

 

All our custom hydraulic cylinders are made-to-order to ensure that they are an exact fit for your specifications. We offer full flexibility with design specifications, including body material, rod plating, mounting options, and control & adjustable features, such as position sensors, bumpers/cushions, and brakes.

 

Scroll to browse our custom cylinder examples below, and contact us with your drawings or specifications to see how we can serve your application needs.

  • Telescopic Hydraulic Cylinder
  • Large Bore Boom Cylinder
  • Hydraulic Press Cylinder
  • Counterbalancing Pneumatic Cylinder
  • Automatic Gauge Control (AGC) Cylinder
  • Roll Force / Push-Up Cylinder
  • Welded Cylinder
  • 800-Ton Jack Cylinder
  • Hydraulic Rotary Actuator
  • Rack-and-Pinion Rotary Actuator
  • Ladle Turret Cylinder
  • Mold Oscillating / Pusher Cylinder
  • Clamp Cylinder

Telescopic Hydraulic Cylinder

Applications: steel, energy, and civil infrastructure industries. Telescopic cylinders are multi-stage cylinders that are ideal when long stroke lengths are required and installation space is limited.

 

We manufacture 2-stage, 3-stage, and 4-stage hydraulic cylinders with patented technology for precise multi-stage strokes for heavy duty applications. The 3-stage telescopic hydraulic cylinder seen in the image had the following specifications:

  • Bore size: 12 inches
  • Rod diameter: 10.6 / 7.1 / 3.9 inches
  • Total stroke length: 118 inches
  • Working pressure: 2,030 PSI

 

This long stroke hydraulic cylinder was manufactured for a coal power plant based in China. It was manufactured with forged steel with additional protective coating for the harshest conditions of extreme temperatures, demanding workloads, and dirty environments for a long service life.

custom-telescopic-hydraulic-cylinder-for-power-plant
illustration-4-stage-telescopic-cylinder
custom-boom-cylinder-for-marine-application

Boom Cylinder

Applications: Heavy Equipment for Marine, Offshore Construction, Energy, and Mining Industries.

 

Our boom cylinder shown below is a custom hydraulic cylinder used in a Continuous Ship Unloader (CSU) for one of the largest coal plants in South Korea. It was manufactured to withstand long service life and heavy, high-volume loads in harsh marine conditions.

 

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

Hydraulic Press Cylinder

Our most frequent projects are our custom hydraulic press cylinders for press machines from 30-ton capacities to over 1,000-ton capacities.

 

Press machines equipped with our large bore, heavy-duty cylinders are used in forging presses, stamping presses, filter presses, and industrial guillotine presses in steel mills, waste & recycling facilities, and shipbuilding factories.

Counterbalancing Pneumatic Cylinder

Application: Press Pneumatic Counterbalancing Systems

 

In addition to our main press cylinders, we also manufacture large bore pneumatic cylinders for our clients’ press counterbalancing systems. Our custom pneumatic cylinders reduce heat and power loss for clients who use large stamping presses.

25-inch Bore Counterbalancing Pneumatic Cylinder
  • Bore size: 25.6 inches
  • Rod diameter: 3.9 inches
  • Stroke length: 98.4 inches
  • Working pressure: 100 PSI
44-inch-Counterbalancing-Pneumatic-Cylinder
  • Bore size: 44 inches
  • Rod diameter: 4.7 inches
  • Stroke length: 50.3 inches
  • Working pressure: 115 PSI

Automatic Gauge Control (AGC) Cylinder & Roll Force Push-Up Cylinder

Application: Hot Rolling Mills and Steel Manufacturers.

 

Our Automatic Gauge Control (AGC) Cylinders and Push-Up Cylinders, also called Roll Force Cylinders, are used by high-volume hot rolling mills in the steel industry. They help push steel slabs and blooms up between steel mill rolls to further flatten and process into the desired thickness.

AGC-Cylinder-for-Hot-Rolling-Mill
  • Bore size: 25.2 inches
  • Rod diameter: 20.9 inches
  • Stroke length: 8.9 inches
  • Working pressure: 3,550 PSI
Push-Up-Roll-Force-Cylinder-for-Steel-Mill
  • Bore size: 41.3 inches
  • Rod diameter: 35.4 inches
  • Stroke length: 12.2 inches
  • Working pressure: 4,500 PSI

Welded Cylinder

Application: Transportation, Energy, & Steel Manufacturing Industries

 

Our welded hydraulic cylinders are designed to provide heavy lift and power in rugged environments. The custom cylinders below were manufactured for one of the most productive steel mills in South Korea. They provide the hydraulic power in the coil cars used to lift and transport steel coils in the steel mill’s cold processing plants.

  • Bore size: 9.8 inches
  • Rod diameter: 5.5 inches
  • Stroke length: 16.1 inches
  • Working pressure: 3,050 PSI
Welded-Cylinder-Custom-Made-for-Steel-Coil-Car
800-ton-Jack-Cylinder-for-Offshore-Construction

800-Ton Jack Cylinder

Application: Civil Infrastructure & Offshore Construction

 

Our 800-ton Jack Cylinder was custom manufactured for a special underwater infrastructure project that involved building a tunnel under the ocean floor to improve transportation between Korea’s mainland and island cities.

 

This custom hydraulic cylinder helped hold and adjust the shape of the tunnel during construction. It was manufactured to withstand and perform in harsh construction environments.

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

Hydraulic Rotary Actuator

Applications: Steel Manufacturing & Cold Mills

 

Our custom rotary actuators are used by one of the world’s top steel manufacturers in their coil processing lines. They are manufactured for high volume, heavy load production.

  • Rod diameter: 4.5 inches
  • Stroke length: 6.9 inches
  • Working pressure: 1,450 PSI
  • Line speed: 984 feet per minute
  • Rotational speed: 852 RPM
Hydraulic-Rotary-Actuator-for-Cold-Steel-Mill-Uncoiler
Rack-and-Pinion-Rotary-Actuator-for-Steel-Mill

Rack-and-Pinion Rotary Actuator

Applications: Steel Manufacturing

 

Our rack-and-pinion rotary actuator has a rotation of 180° and an operating pressure of 3,045 PSI. This high torque rotary actuator was custom manufactured with forged steel for heavy-duty conditions of steel mills.

 

  • Bore size: 7.9 inches
  • Rod diameter: 7.5 inches
  • Stroke length: 31.1 inches
  • Rotation: 180°
  • Working pressure: 3,045 PSI

Ladle Turret Cylinder

Applications: Steel Manufacturing

 

LPR Global’s ladle turret cylinder was a custom project supplied to POSCO, Korea for their steel mills.

 

  • Bore size: 34 inches
  • Rod diameter: 31.5 inches
  • Stroke length: 33.1 inches
  • Working pressure: 2,900 PSI
Large-Bore-Ladle-Turret-Cylinder
Mold-Oscillating-Cylinder-for-Steel-Mill

Mold Oscillating Pusher Cylinder

Applications: Steel Manufacturing, Continuous Casting Machine (CCM)

 

Our mold oscillating cylinders and pusher cylinders help adjust and form steel slabs or blooms during CCM production. These custom hydraulic cylinders are manufactured with forged steel and are heat-treated for superior strength and resistance in the harsh steel mill conditions of extreme temperatures and high work volume.

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

Clamp Cylinder

Applications: Steel Manufacturing and Processing

 

  • Bore size: 13.8 inches
  • Rod diameter: 7.9 inches
  • Stroke length: 9 inches
  • Working pressure: 2,900 PSI
Large-Bore-Clamp-Cylinder-for-Steel-Mills

Large Bore Cylinders Serve Steel Mill, Hydraulic Press Manufacturing, Construction, and Offshore Industries

Our clients include some of the most productive steel mills in the world, including POSCO Steel, Nippon Steel Corporation, and JFE Steel Corporation. We also supply custom hydraulic cylinders 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 cylinders by your application and industry

Steel Manufacturing | Hot Rolling Mills and Cold Rolling Mills

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

 

Hot Rolling Mills

Molten Steel Handling

 

Our ladle turret cylinders are used to handle molten steel between the melting and casting processes. They are manufactured with forged steel and are designed to withstand harsh environments of extreme temperatures at steel mills. 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
Large-Bore-Ladle-Turret-Cylinder

Continuous Casting Machines (CCM)

 

We manufacture mold oscillating cylinders and pusher cylinders that help adjust and form steel slabs or blooms during continuous production. Our mold oscillating cylinders are manufactured with forged steel and are heat-treated for superior strength and resistance to physical and thermal damage. We also offer chrome and ceramic rod plating for additional wear resistance.

  • Bore size: 15 inches
  • Rod diameter: 11 inches
  • Stroke length: 29.5 inches
  • Working pressure: 2,030 PSI
Mold-Oscillating-Cylinder-for-Steel-Mill

Hot Rolling

 

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

 

In designing these custom AGC Cylinders for our client, we incorporated both accurate and precise control, as well as capacity for heavy loads and harsh conditions. Hyundai’s AGC Cylinders were custom made with the following specifications:

  • Bore size: 41.3 inches
  • Rod diameter: 35.4 inches
  • Stroke length: 12.2 inches
  • Working pressure: 4,500 PSI
AGC-Cylinder-for-Hot-Rolling-Mill

For superior strength from heat and pressure, our custom hydraulic cylinders are manufactured exclusively with forged steel. As with all our cylinders, we offer options of hardened steel, aluminum, and specialty body materials and the option of chrome or nickel plating of varying thicknesses for our AGC Roll Force and Push-Up Cylinders.

 

We also manufacture large bore Push-Up Cylinders for large temper mills or skin pass mills. Our custom push-up cylinders for one of Japan’s largest steel manufacturers have the following specifications:

  • Bore size: 25.2 inches
  • Rod diameter: 20.9 inches
  • Stroke length: 8.9 inches
  • Working pressure: 3,550 PSI
Push-Up-Roll-Force-Cylinder-for-Steel-Mill

Workholding

 

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

  • Bore size: 13.8 inches
  • Piston diameter: 7.9 inches
  • Stroke length: 9 inches
  • Working pressure: 2,900 PSI
Large-Bore-Clamp-Cylinder-for-Steel-Mills

Cold Rolling Mills

Coil Cars

LPR Global’s Welded Cylinders are supplied to POSCO, Korea to help the steel manufacture transport their steel coils within their high-volume plants. 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
Welded-Cylinder-Custom-Made-for-Steel-Coil-Car

Uncoilers and Recoilers

Our Rotary Cylinders are used in recoilers and uncoilers in cold coil processing lines. They are designed to handle large volumes and heavy loads for high production mills. 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
Hydraulic-Rotary-Actuator-for-Cold-Steel-Mill-Uncoiler

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 over 1,000 tons, specializing in hydraulic press cylinders for machines with a 300-ton capacity or greater. Our past projects include main cylinders for forging press, stamping press, guillotine press, filter press, and baler press machines.

 

We also supply counterbalancing pneumatic cylinders to Hyundai Heavy Industries (shipbuilding and marine engineering) and IHI Corporation (offshore heavy equipment manufacturing) for their hydraulic press machines.

25-inch Bore Counterbalancing Pneumatic Cylinder
  • Bore size: 25.6 inches
  • Rod diameter: 3.9 inches
  • Stroke length: 98.4 inches
  • Working pressure: 100 PSI
44-inch-Counterbalancing-Pneumatic-Cylinder
  • 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 Coal Transportation

Our custom boom cylinder was manufactured for a coal plant client. It is used for their Continuous Ship Unloader (CSU), which transfers coal from their marine shipping containers to landed containers in external marine conditions.

  • Bore size: 27.6 inches
  • Piston diameter: 14.2 inches
  • Stroke length: 4,163.6 inches
  • Working pressure: 4,640 PSI
custom-boom-cylinder-for-marine-application

Offshore Infrastructure Construction

In a special infrastructure project to build a bridge-tunnel between Korea’s mainland and island cities, our custom 800-ton Cylinder Jacks were used to uphold and adjust tunnel ceilings and walls during construction. Since the tunnels ran under the ocean floor, our custom hydraulic cylinders were manufactured to withstand heavy loads, high pressures, and harsh conditions.

  • Bore size: 25.6 inches
  • Piston diameter: 23.2 inches
  • Stroke length: 31.5 inches
  • Working pressure: 3,480 PSI
800-ton-Jack-Cylinder-for-Offshore-Construction

Drilling & Mining

We are also supplying choke cylinders to clients in the mining industry. Our choke cylinders are used in their hammer drills as the main source of hydraulic power required to break through the Earth’s surface.

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 hydraulic or pneumatic cylinder is placed on a test jig that measures the cylinder’s full strokes over several cycles to test for abnormal or substandard performance. The cylinder is only approved for the next step 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 and 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

All our double acting cylinders undergo an internal bypass test to check for leakage.

Custom-Ladle-Turret-Lifting-Cylinder-with-Test-Stand

Manufacturing Capabilities & Equipment

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

 

Full In-House Manufacturing and Testing

Our vertically integrated job shop has the expertise to handle all processes – from design engineering to manufacturing and testing – in-house at our facilities that are certified to ISO 9001:2015 and ISO 14001:2015 quality standards.

LPR-Global's-Custom-Hydraulic-Cylinders-Machining-Shop
Cylinder Machining Shop 51,775 sq.ft. with 40-ton and 10-ton overhead cranes
LPR-Global's-Custom-Cylinders-Assembly-Facilities
Cylinder Assembling Shop 38,150 sq.ft. with 50-ton and 5-ton overhead cranes

Our plant is fully equipped with both 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.

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