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  #11  
Old 03-18-2018, 03:02 PM
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That jack idea would be the way to go one would think
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  #12  
Old 03-18-2018, 03:03 PM
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Seems to me, in my fuzzy minds eye, 1 1/8th is a fairly common ram diameter. Any good hydraulics shop should have a wide selection.

Who knows how to pick a cup seal? (cup dia. spring insert, Particular type of material, etc.) cutting a seat for it on the piston should be a no brainer, pretty sure I can handle that. Make the piston diameter .002 or .003 smaller than the finished bore, right?

I'm thinking, 2 cup seals, in the same relative position as the "O" rings in the original plans, separated by a slip on collar? or, perhaps an "O" ring on top, like the original design, just for centering, acting as a secondary seal and a cup on the bottom. (As the primary seal)

OK, back under my rock...

RED
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  #13  
Old 03-18-2018, 04:04 PM
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Hydraulic load cells are around. To start, you need to be able to figure the area of a circle and do a simple calculation to convert indicated pressure to force/load.

If you have access to metric pressure Gage's, you can even play tricks to get a reading on the gage that indicates pounds or 10s of pounds.

FYI, At one time, there was a plan for a tongue weight scale project on the Sherline site.
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  #14  
Old 03-18-2018, 04:22 PM
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Another one
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  #15  
Old 03-18-2018, 04:32 PM
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Sherline sells a trailer tongue weight scale these days.

https://sherline.com/product/sherlin...-weight-scale/
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  #16  
Old 03-18-2018, 05:45 PM
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Quote:
Originally Posted by USMCPOP View Post
Sherline sells a trailer tongue weight scale these days.

https://sherline.com/product/sherlin...-weight-scale/
You would think.....there would be an electronic one by now, probabally
that talks to your phone.

Maybe a load cell could be integrated in the hitch for "on the go"
"Real time" weight measurement.
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  #17  
Old 03-18-2018, 07:07 PM
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Welp, I guess I'm more tecno resistant than I thought. This little scale was very handy, simple, easy to stow and use, accurate and unbreakables. No battery to die, at the worst possible time, no cord to lose. In short, I want one again. (This one gets an eye bolt, a leash and a bright orange sign)

I'm not trying to re invent the wheel, I just think I could use a bit more capacity, now that I'm playing with bigger trailers.

I already have a gage on my press, I bought the air over hyd. jack at hobo fright, to replace the original one that started to leak. (it was mounted upside down) very handy to use. I never tried to calibrate it, for the way I use it, stop just before the part shatters or easily tell when the part stops moving, close counts.

I'm going to invest the time to build another one, I just want to do it better than the last time.

Help me pick the right parts and I'll stop bothering ya'll.

RED
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  #18  
Old 03-18-2018, 07:34 PM
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There is a built in version available.

https://www.weigh-safe.com/

Red, keep on bothering us, makes for good conversation.


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  #19  
Old 03-18-2018, 08:18 PM
Lew Hartswick Lew Hartswick is offline
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Quote:
Originally Posted by LKeithR View Post
Good point...hadn't thought of that. For 2500 psi you'll need to go to a proper cup type seal. If you do decide to mess around with a larger bore it's handy to remember that "doubling" the diameter of the bore gives you "exactly" 4 times the surface area...
One of the "benefits" of that old "squared" in the Pi * R squared. :-)
...lew...
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  #20  
Old 03-18-2018, 09:07 PM
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Quote:
Originally Posted by Lew Hartswick View Post
One of the "benefits" of that old "squared" in the Pi * R squared. :-)
...lew...
Many of the 3000psi cylinders I have torn down have an O ring with a teflon backing ring and no cup.

Quote:
Originally Posted by camdigger View Post
Hydraulic load cells are around. To start, you need to be able to figure the area of a circle and do a simple calculation to convert indicated pressure to force/load.

If you have access to metric pressure Gage's, you can even play tricks to get a reading on the gage that indicates pounds or 10s of pounds.

FYI, At one time, there was a plan for a tongue weight scale project on the Sherline site.
I have one of these Cam. It says Sensator 3AH0205 on it. Off a drill rig I think, the gauge was destroyed so have no ratings on it.
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