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ACTUATORS 1 ACT-25 For further information www.norgren.com Piston Rod Diameter Selection Applications requiring long extend (push) strokes may require oversize piston rod diameters to prevent buckling. To determine the correct rod diameter for your application follow these simple steps: 1. Select the force from the Cylinder Force and Volume Chart that is required for your application. For pressures not shown use: Force = Piston Surface Area x Operating Pressure 2. From the Cylinder Mounting Diagram Chart (previous page) determine the Stroke Factor based on mounting style being used. 3. To obtain effective length "L", multiply cylinder stroke by appropriate Stroke Factor as determined in step 2. If cylinder has extra rod extension add this to the stroke length before obtaining effective length. Effective Length = Actual Stroke x Stroke Factor 4. To determine adequate rod diameter locate calculated effective length "L" on Rod Selection chart (below). 5. Selecting Stop Tubes: Stop tubes enhance the transverse load carrying capability of a long stroke cylinder by increasing the distance between the piston and rod bearing at full extension. When the value of L (calculated from the Adequate Rod Diameter Chart) is less than 40", a stop tube is not required. However, if L is 40" or more, 1" of stop tube is recommended for every 10" (or fraction thereof) over 40". Stop Tube Enhances the transverse load carrying capability of a long stroke cylinder by increasing the distance between the piston and rod bearing at full extension when placed on head end. Ideal for those applications requiring longer strokes or where additional rod stability is desired. TO ORDER: Enter option code ST( – ). Specify stop tube length. Rod Selection Chart Note: In some cases it may be necessary to use a larger bore cylinder than is required for force in order to obtain an adequate rod diameter. Extended Force (lbs) Maximum effective length "L" recommended for rod diameters 5/8" 1" 1-3/8" 1-3/4" 2" 2-1/2" 50 95 – – – – – 100 65 170 – – – – 150 50 135 260 – – – 200 43 115 220 – – – 300 34 93 180 300 – – 500 25 70 135 250 – – 750 20 56 110 185 250 – 1000 17 48 94 160 220 – 1500 13 38 80 130 170 260 2000 11 33 64 110 140 225 3000 9 26 51 90 115 180 4000 7 22 44 75 100 155 5000 – 20 39 66 88 140 6000 – 18 35 60 79 125 8000 – 15 30 52 68 110 10000 – 12 26 46 60 95 12500 – 10 22 41 52 86 15000 – – 19 37 48 79 20000 – – 14 29 41 68 Stop Tube Length Stop Tube Length Head Stop Tube Cap Stop Tube Stop Tube Length Head Stop Tube consisting of Spacer Tube and Block J NFPA Aluminum & Steel Cylinders