Parker Air Cylinder Stroke Selection Chart


Use this Air Cylinder Stroke Selection Chart to select a piston rod for thrust/push applications. Follow these steps:

  1. Determine the type of cylinder mounting style and rod end connection that is required. Consult the chart below to find the "stroke factor" that corresponds to the selected specifications.
  2. Determine the "basic length" by using the following equation:
    Basic Length = Actual Stroke x Stroke Factor
    The graph is prepared for standard rod extensions beyond the face of the gland retainers. For rod extensioins greater than standard,
  3. 3. Find the load imposed by the thrust application by multiplying the full bore area of the cylinder by the system pressure.
  4. 4. Enter the graph along the values of "basic length" and "thrust" as found above and note the point of intersection.
    • A. The correct piston rod size is read from the diagonally curved line labeled "Rod Diameter" above the point of intersection,
    • B. The required stop tube length is read from the right of the graph by following the shaded band in which the point of intersection is found.
    • C. If the required stop tube length is in the region labeled "consult factory," submit the following information for analysis:
      • Cylinder mounting style
      • Rod end connection and method of guiding load
      • Bore, required stroke, length of rod extension (dimension "LA" or "LAF"), if greater than standard, and series of cylinder used
      • Cylinder mounting position (if angle or verticle, specify direction of piston rod)
      • Operating pressure of cylinder, if limited to less than standard pressure for cylinder selected

Recommended Mounting Styles for Maximum Stroke and Thrust Loads

Mounting Style Rod End Connection Case Stroke Factor

Groups 1 or 3

Long stroke cylinders for thrust loads should be mounted using a heavy-duty mounting style at one end, firmly fixed and aligned to take the principal force. Additional mounting should be specified at the opposite end, which should be used for alignment and support. An intermediate support may also be desirable for long stroke cylinders mounted horizontally.

Fixed and Rigidly Guided I      stroke-selection-case-i.png 0.50
Pivoted and Rigidly Guided II     stroke-selection-case-ii.png
Supported but not Rigidly Guided III     stroke-selection-case-iii.png

Group 2

Style D - Trunnion on Head

Pivoted and Rigidly Guided IV     stroke-selection-case-iv.png 1.00
 Style DD - Intermediate Trunnion Pivoted and Rigidly Guided V      stroke-selection-case-v.png 1.50

Style DB - Trunnion on Cap

Style BB - Clevis on Cap

Pivoted and Rigidly Guided VI    stroke-selection-case-vi.png 2.00



Available Pneumatic Cylinder Styles

Tie-rod air cylinder - non-rotating Tie Rod Cylinders
Round Body Cylinders
Compact Cylinders
Guided Cylinders
Rodless Cylinders


Quote by Part Number Help with Cylinder Identification

Engineering & Product Selection Information

Pneumatic Product Selection

  • Pneumatic Actuators & Air Cylinders
  • Pneumatic Cylinders
  • Automation Products: rotary actuators, grippers, slide tables, rotary tables, escapement
  • Actuator Accessories: Linear alignment couplers, flow controls, air oil tanks, rodlocks, electronic sensors, shock absorbers

Application Engineering Data


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