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Tractor Talk Discussion Forum

Hydraulic Ram

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Val

11-17-2004 08:32:04




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Thank you, all.
What I am looking for is correlation between cylinder bore size and rod Dia. without piston. I would like to replace single acting cylinder, 1.50 bore (25,000/year)
with hydraulic Ram (rod displacement cylinder), assuming potential cost savings due to design simplification. Is any special seals and wear rings are required




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david val

11-18-2004 03:32:36




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 Re: Hydraulic Ram in reply to Val, 11-17-2004 08:32:04  
the single acting cylinder is probably extracting, if so rod diameter has no significance. the ram rod diameter should equal the bore diameter to get the same force.
david



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Farmered

11-17-2004 18:16:33




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 Re: Hydraulic Ram in reply to Val, 11-17-2004 08:32:04  
Hydraulic ram? Isn't that where steel wool comes from? LOL



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Hermit

11-17-2004 11:53:21




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 Re: Hydraulic Ram in reply to Val, 11-17-2004 08:32:04  
I forgot to mention to make sure there's a stop plate bolted to the fluid end of rod. If not, the rod will pop right out when it reaches the end of the shoulder (learned from experience).



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Hermit

11-17-2004 11:39:43




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 Re: Hydraulic Ram in reply to Val, 11-17-2004 08:32:04  
I don't know if there's a formula for bore/rod correlation since the resulting force depends on the rod diameter and fluid pressure. The rod stability relies on the shoulder length and clearance not cylinder bore. Last year I changed the seals in my New Idea/Horn loader which has the ram type actuator. I took the measurements while it was apart.
Rod diameter - 2.344"
Shoulder diameter - 2.353"
Shoulder length - 5.25"
Cylinder diameter - 2.75"
I got the seals from NAPA's on-hand stock and they hold fine. There's also a non-pressure weather seal on the outside end of the shoulder just to keep the elements out. Hope this helps.

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