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Tractor Talk Discussion Forum

anyone really know hydraulics ?

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BSer

08-12-2005 15:33:10




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I need to build a high density baler for tin at my boneyard. The critical question is: can I use the barrels[cylinders] of service station lifts to build 3000 lb rated cylinders? Is the wall strenght there? I cant afford 3 $10k cylinders that are designed for the job. What kind of tubing and bore finish/specs were they shipped with. Any knowledgable advice appreciated.




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Leland

08-12-2005 21:04:46




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 Re: anyone really know hydraulics ? in reply to BSer, 08-12-2005 15:33:10  
find a heavy equipment yard they will have all the cylinders pump and control valves you need to mash tin look at what a track hoe can destroy .



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les mack

08-12-2005 19:32:32




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 Re: anyone really know hydraulics ? in reply to BSer, 08-12-2005 15:33:10  
first i don't know all that much about hydraulics but if i understand the question you are not looking to lift, your're looking to crush metal/tin/steel? this would make a difference also down pressure or horizontal pressure. not much help i guess



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Midwest redneck

08-12-2005 17:37:29




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 Re: anyone really know hydraulics ? in reply to BSer, 08-12-2005 15:33:10  
I have an engineering degree, Associates degree in Hydraulics, Really. Question 1. How much weight do you need to lift? Question 2. How far do you need to lift it? I need to know these questions before I answer.



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Joe(TX)

08-12-2005 17:25:21




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 Re: anyone really know hydraulics ? in reply to BSer, 08-12-2005 15:33:10  
Are you talking about the old type in floor lifts or the newer above ground type? The old in loor used shop air pressure and definatly would not work. I assume you mean 3000 psi and not 3000 lb force. Is there a reasone you need 3000 psi? Use larger 2000 or 2500 psi cylinders, they cost much less. How much force do you actully need? A 5.5 in. dia. cylinder at 2000 psi will lift as much a 24 in cylinder at 100 psi.
Check out these people for surplus hydraulic cylinders.

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Harvesterguy

08-12-2005 17:20:43




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 Re: anyone really know hydraulics ? in reply to BSer, 08-12-2005 15:33:10  
What is the bore (dia) and wall thickness of the cylinders and what is the maximum hydraulic system pressure? If you know these specs. I can calculate the cylinder wall strength.

The easiest way to figure this out is to find the manufacturers specs for the cylinders and determine the max pressure rating. If you set the system pressure to the max. rated, the force generated per cylinder can be calculated by multipling the sys. pressure x 3.14 x half of the bore dia. squared

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BobMo

08-12-2005 16:56:56




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 Re: anyone really know hydraulics ? in reply to BSer, 08-12-2005 15:33:10  
You can use whatever you want but if you don't get an engineer that specializes in hydraulics you'll kill yourself or somebody. Hope it works out for you...



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