Helpful Hints - Peninsular Configurator

Model LH  NFPA Low Pressure Hydraulic Cylinders

"Selecting the Correct Piston Rod Diameter"

Many different Piston Rod Diameters are approved for various Bore Sizes by the National Fluid Power Association (NFPA) for Low Pressure Hydraulic Cylinders.

These Piston Rod Diameters, standardized by the NFPA, are one contributing factor that allows cylinder interchangeability to occur between cylinder manufacturers who produce their cylinders to NFPA guidelines. The dimensions for Piston Rod Threads are also determined by NFPA guidelines and are selected for each approved Piston Rod Diameter.

The Peninsular Piston Rod Diameter and Rod Thread Chart below illustrates the cylinder bore, rod diameter and rod threads set forth by the NFPA which are incorporated into all Peninsular Model LH low pressure hydraulic cylinders.  Know that larger diameter piston rods reduce the cylinder force on the retracted (pull) stroke of the cylinder more than smaller rod diameters. This is because there is less surface area of the piston available.

Should additional Rod Diameters or Threads become necessary Peninsular will manufacture these sizes as well; however, adding additional Rod Diameters or Threads other than those charted herein, could prevent NFPA cylinder interchangeability from occurring to other cylinder manufacturers.

Our Cylinder Configurator creates models up through and including 6” bore Model LH low pressure hydraulic cylinders. For bore sizes over 6” contact Peninsular.

Should you need any further assistance please feel free to call us at (800) 526-7968 in the USA or Canada or at (586) 775-7211. You may also e-mail us at sales@peninsularcylinders.com.

Piston Rod Diameter and Rod Thread Chart for

Model LH Low Pressure Hydraulic Cylinders