Thread: pneumatics lifting forces
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Unread 28-01-2005, 08:11
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Re: pneumatics lifting forces
When sizing a pneumatic application, another thing to think about would be side loads and efficiency losses.

For instance, working from the numbers Chris posted above, there are many situations where you will not get your entire 176 lbs (retracting) for a 2" cylinder at 60 psi. If the rod of that cylinder is experiencing any side loads, then more friction is created inside of the cylinder. A certain amount of force is needed to overcome this friction. This amount may be up to 1/4-1/3 of the force of the cylinder, if the side load is significant. Therefore, cylinder output forces in these situations could be only 70% - 80% of your calculated force.

Andy B.