R & J Cylinder specializes in the engineering and manufacture of medium bore mill type hydraulic cylinders for a variety of heavy duty applications. Our medium bore mill type hydraulic cylinders are engineered for optimal performance under high nominal pressure, larger piston diameter, and long stroke length.

Our hydraulic cylinder engineering team can handle any fabrication challenge. Our ASME certified welders put care and precision into every medium bore hydraulic cylinder we make. R & J Cylinder’s medium bore cylinder fabrication capabilities include custom engineering of a wide array of cylinder styles and types, multiple body and mount options, actuator options, all the way to final finish of every cylinder.

We are committed to being unique in the hydraulic cylinder manufacturing market. Our vertically integrated manufacturing process gives us a total cost advantage over the life cycle of every custom hydraulic cylinder we make.

Our unique combination of engineering and fabrication professionals at R & J Cylinder includes over 100+ years of materials experience, application experience and processing experience, making us one of the most agile and high-performance hydraulic cylinder manufacturers in Ohio and the US.

Mill Type Cylinder Specifications—Medium Bore

Bore Size: 4" to 8"
Stroke Length: 300"
Operating Pressure: up to 10000 PSI

Medium Bore Mill Type Hydraulic Cylinder Styles

Round Ring Retained Cylinder
Rod Fed Cylinder
Displacement / Ram Cylinder
Threaded Body Cylinder
Bolted head Cylinder
Single Acting/Double Acting Cylinder
Master/Slave Cylinder

Medium Bore Mill Type Hydraulic Cylinder Options and Features

Application Specific Materials
Round body hydraulic cylinders; other body types as required by any application

Application Specific Construction Options

  • Actuator options
  • Hydraulic cushions
  • Piston seals/Low friction seals/Application Specific Seal Materials options
  • Integrated Valve options
  • Porting options
  • Electrical options
  • Position Sensing options
  • Re-phasing
  • Exterior finish including various coating and plating options

Mill Type Hydraulic Cylinder—Mount Options

  • Clevis Mount
  • Cross Tube Mount
  • Flange Mount
  • Trunnion Mount
  • Adjustable Mount
  • Lug Mount

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ASME Certified Welding