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Power-Block 2 Selection

Power-Block 2 Rod Cylinder Slide Selection Procedure
1.  Compile Application Requirements
To determine the appropriate Rod Cylinder Slide model for an application, compile the following information:
  • Available pressure (PSI)
  • Weight of load (lbs. or kgs.)
  • Orientation of load (lbs. or kgs.)
  • Velocity of load (in./sec. or mm/sec.)
  • Stroke length (in. or mm)
2.  Select Rod Cylinder Slide Size
  • Consult the Theoretical Force vs. Pressure charts
  • Cross reference the load force (or load weight if force is not known) and the available operating pressure. If the intersection falls below the diagonal line, and if moments do not exceed maximum values listed for that model (see Step 3), the rod cylinder slide will accomadate the application. If the intersection is above the diagonal line, a larger cylinder bore size should be considered.

NOTE: Additional force may be required to obtain the necessary acceleration for vertical or horizontal loads.

3.  Determine Nature of Load and the Effect of Bending Moments
If the rod cylinder slide will guide and support a load located directly over the center of tooling plate, bending moments will not be a factor in the rod cylinder slide selection. NOTE: The maximum load weight "W" must not exceed the capacity limits of the rod cylinder slide selected.

  • Bending Moments
    For off center or side loads, determine the distance from the center of mass of the load to the center of the tooling plate. This measurement is needed to calculate the torque for bending moments.
    Should the resulting maximum bending moment exceed figures indicated on the chart, external guides, auxiliary carrier/s or a larger cylinder should be considered.
4.  Determine Effect of Load vs Extended Length 
  • Consult the Max. Load Weight vs. Stroke Length chart for the model selected.
  • Cross-reference the load weight and the extended length. If the intersection falls below the maximum load line, and if moments do not exceed maximum values listed fot that model (see Step 3), the rod cylinder slide will accommodate the application. If the intersection is above the diagonal line, a larger rod cylinder slide bore size should be considered.
5.  Consider Options
  • Switches- dc Reed, Hall-effect or ac Triac
  • Shock Absorbers- if needed