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Hydraulic Cylinder Design

02/12/2009 3:17 PM

does any one see an issue for the following specs for a hydraulic 8" 50 ton, 2000psi:hyd cylinder?

cylinder tube, 8" 1020 dom tubing 1/2" wall

tie rods: 1" 1045.

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Guru
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#1

Re: Hydraulic Cylinder Design

02/12/2009 4:54 PM

Cyl Rod dim? Push/pull? What is the purpose? Are you trying to design the cylinder? otherwise, your numbers appear to be right out of the book.

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#2
In reply to #1

Re: Hydraulic Cylinder Design

02/12/2009 5:51 PM

we are making the cylinder, it's for a press for some in-house tooling., I just want to make sure it is strong enough from a safety standpoint.

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Guru
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#3
In reply to #2

Re: Hydraulic Cylinder Design

02/12/2009 5:57 PM

The Cylinder you describe is a common off the shelf component. I can easily say it would be more cost effective to buy a already built/tested/certified cylinder from a reputable manufacturer/distributor. Save the time, headache, and safety concerns and buy something you know will preform. (and if it does fail its not your responsibility)

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Power-User
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#4

Re: Hydraulic Cylinder Design

02/12/2009 11:19 PM

Hi Derek

Critically, how to you propose to mount the cylinder? Trunnion mount's, pin and clevis, end face mount's, ball mount's etc etc?

Also, is there only one of 'em?

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Guru

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#5

Re: Hydraulic Cylinder Design

02/13/2009 5:43 AM

1- do not rediscover the wheel it is better to buy than to build.

2- your rod D is too small of course it would be better to give the stroke :the rod in "pushing" can fail under buckling

3- you do not indicate the number of strokes / unit of time neither the expected speed

better follow #1

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#6

Re: Hydraulic Cylinder Design

02/13/2009 8:27 AM

Does the rod PULL only or PUSH also?

My humble calculation is that your cylinder at 2000psi produces well in the excess of 18tonnes of pressure and unless the rod is guided in PUSH mode, then it'll buckle probably on the first stroke except, if it is a short one.

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#7
In reply to #6

Re: Hydraulic Cylinder Design

02/13/2009 10:26 AM

the guide rod is 4", the tie rods (4) are 1" .... it's push only.

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