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Implement Alley Discussion Forum

Hydraulic Cylinder Capicity

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Author  [Modern View]
DoubleR

08-12-2014 10:38:01
198.105.230.160



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I'm looking at ordering a new cylinder for my 8 Ft. I.H. transport disk from ASC. The one I'm looking at has a 1 1/16 rod. with an 8 inch lift. Retracted length of 20 inches 2500 psi.
My question is, is it big enough to lift the disk up and down without blowing the seal or something else. The one I have been using on it has an 1 1/8 rod on it.




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Paul

08-13-2014 05:42:50
70.197.195.60



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 Re: Hydraulic Cylinder Capicity in reply to DoubleR, 08-12-2014 10:38:01  
Just to agree with the others, a 3 inch bore is the common hyd cylinder all implements are designed to use. The rod size isn't so important, other than the manufacturer has more or less confidence in the steel materials he is working with and will make the rod a bit bigger or smaller.

And yes there are many cases where a special cylinder is needed, bigger rod for a side or extreme compression force, etc. but not on a common disk or implement use.

Paul

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RodInNS

08-13-2014 04:23:30
216.118.158.123



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 Re: Hydraulic Cylinder Capicity in reply to DoubleR, 08-12-2014 10:38:01  
A 3"x12" is the standard lift cylinder on a small disc. I doubt the 8" will have enough stroke to fully lift it unless you rearrange the mechanism to account for the lack of rod length.

Rod



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Tx Jim

08-13-2014 05:01:29
69.35.160.115



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 Re: Hydraulic Cylinder Capicity in reply to RodInNS, 08-13-2014 04:23:30  
Quoting Removed, click Modern View to see

Most tandem disks I've seen/used required an 8" stroke cylinder not 12".



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RodInNS

08-13-2014 19:48:03
216.118.158.123



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 Re: Hydraulic Cylinder Capicity in reply to Tx Jim, 08-13-2014 05:01:29  
I dunno. 3x12 on everything here. Wouldn't get them off the road with a 3x8.

Rod



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rickb

08-12-2014 13:51:11
70.192.19.92



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 Re: Hydraulic Cylinder Capicity in reply to DoubleR, 08-12-2014 10:38:01  
Rod diameter has nothing to do with lifting force, and everything to do with overall cylinder strength. 1-1/16" is probably the smallest rod diameter you should consider.



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DeltaRed

08-12-2014 11:39:34
67.40.59.57



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 Re: Hydraulic Cylinder Capicity in reply to DoubleR, 08-12-2014 10:38:01  
A standard 8"stroke 'farm' cylinder is what you need.3" is more than adequet for that small disk.As was said,"rod size' has nothing to do with it.



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DoubleR

08-12-2014 13:27:13
198.105.230.160



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 Re: Hydraulic Cylinder Capicity in reply to DeltaRed, 08-12-2014 11:39:34  
When you say a 3 inch will lift it are you talking 3 inch bore? Is that what I need to refer to when looking at them?
I can look at one in front of me and tell what I need. Its hard to tell when looking at a picture of one on-line though.



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bison

08-12-2014 16:08:32
69.168.144.134



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 Re: Hydraulic Cylinder Capicity in reply to DoubleR, 08-12-2014 13:27:13  
Quoting Removed, click Modern View to see

Yes.
A cylinder with a 3 inch bore at 2200 PSI oil pressure will lift 15000 lb.
The thinner the rod the more chance of bending it.

A cylinder rod of the same dia when used in vertical position can handle more weight without bending than when it is used horizontal



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vernon in ks

08-12-2014 11:10:34
66.210.29.137



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 Re: Hydraulic Cylinder Capicity in reply to DoubleR, 08-12-2014 10:38:01  
Rod size has nothing to do with it. What is the piston/cylinder size? A 3 inch will lift that disc but a 3.5 inch is better.



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John Deere D

08-12-2014 17:15:19
204.244.59.75



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 Re: Hydraulic Cylinder Capicity in reply to vernon in ks, 08-12-2014 11:10:34  
FORCE (weight of Implement) = AREA of RAM/PISTON x PSI/Hydraulic pressure
Force=Area x PSI

EG. Disk/ Forcec(10,000 lbs) Area of 4" Ram(3.142xR2)=3.142x2x2=12.568 x 2500 Hyd/psi=31,420 lbs

4" ram with an area of 12.568 Square Inches x 2500 psi would lift 31,420 lbs 31,420/2000 =15.710 Tons
If my math is incorrect I apologize
Bob........



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