PISTON ROD DIAMETER SELECTION

Selection of the proper Piston Rod Diameter is important and requires careful consideration. Most cylinder models are offered with several rod sizes from which one must be chosen.

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Piston Rod Diameter Selection:

The smallest diameter available within each bore size is termed the “standard” rod. Rods of this description are suitable for use in all cylinders in which work loads are applied in the “pull” direction only. “Standard” rods are also suitable for many “push” applications, but other factors then become involved that may restrict their use. The cylinder mounting style, rod end condition, stroke length, and output force expressed in terms of “pounds of thrust” combine to produce variables which affect the rod size requirement as determined by column strength limitations. After selection of the cylinder bore diameter, the procedure below should be followed to determine the recommended Piston Rod Diameter.

Step 1.
Locate the cylinder mounting style and applica- ble rod end connection “Class” in the charted data below and calculate the Value of “L” using the appropriate formula.

Step 2.
Using the calculated Value of “L”, refer to the chart located on next page to find the “Recommended Stop Tube Length.” If the use of a “Stop Tube” is indicated, review the “D” factor for possible equal increase in length. When applicable, recalculate the Value of “L” using this adjusted figure to determine length of Stop Tube recommended.

Step 3.
Locate the Cylinder Thrust value in the “Rod Diameter Selection” chart located on the next page. If the exact cylinder thrust is not listed, use the next highest charted value. After locat- ing the proper “Cylinder Thrust” column, read across until reaching the first figure which ex- ceeds the computed Value of “L”. The column heading under which this value is located indi- cates the recommended Piston Rod Diameter.

force chart