Hydro-Line® N5 Series Cylinders - Eaton Hydraulics - #20

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Technical Data
Rod Size and Stop Tube Selection (continued)
Rod Size Selection
Standard rod sizes are nor­mally suitable for all applica­tions except for long stroke or high thrust applications. Proper selection of mini­mum rod size may be deter­mined by the following steps:
1. If you know the bore size and operating pressure, thrust can be determined. Refer to the graph in the next column.
2. Select from illustrations on page 20 the type of mounting needed, and determine the length of D with the piston rod in the fully extended position.
3. Find the value of D at the bottom of the graph and follow its line vertically until it until it intercepts the horizontal line, which represents the maximum push thrust to be applied to your cylinder. The inter­section of these two lines will fall within a stripe rep­resenting the minimum recommended piston rod diameter for your needs.
3,000,000 2,000,000
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300,000 200,000
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600 500 400
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100
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Value of D in inches
Stop Tubes
Stop tubes are located between the piston and the rod shoulder on the head end of the cylinder. Bearing loading is reduced by sepa­rating the piston and the rod bushing. Bearing wear and tendency to buckle is reduced.
To determine if a stop tube is required and the length of stop tube needed, use the following procedure:
Determine the value of D with the piston rod in the fully extended position. If the value of D is under 40", no stop tube is need­ed. If D is greater than 40", one inch of stop tube is recommended for each 10", or fraction thereof, beyond 40".
Special Note
When specifying stroke and stop tube lengths, please include net working stroke plus stop tube length.
Rod Bushing
Piston
Stop Tube
EATON Hydro-Line Industrial Tie Rod Cylinders N5/AN5/LAN5 H-CYIG-TM002-E September 2003
21

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