Hydraulic press mods

[dieselsamurai]

That’s gauge is going to have no bearing on the tonnage of your ram if you’re not using the ram it was specified for.

its a 30ton ram designed to operate at a max of 700bar its going to to close enough for me Its a lot better than nothing and I cant justify spending £200 on just a gauge

 

[Munkul]

I don't see any need for a tonnage gauge when a pressure gauge directly relates to tons.

I made up a chart and fixed it next to the gauge (which came from Flowfit as mentioned in the previous post!)

This is a really nice solution! Easy to work out, easy to make a chart, and you can get good quality pressure gauges cheap enough if accuracy is important

 

[Hopefuldave]

That’s gauge is going to have no bearing on the tonnage of your ram if you’re not using the ram it was specified for.

Nope, but he can measure the ram diameter (or to be more accurate, the ram plus moving seal or the cylinder bore?) and calculate tonnage from PSI x ram area - back of a fag-packet, that would be for a 2.7" (maybe 2.75") diameter ram?

Dave H. (the other one)

 

[Seadog]

It's a rear acting cylinder, so measure the bore and you can calculate the pressure directly.

 

[dieselsamurai]

Fitted perfectly got really lucky with thread just need to measure bore now any ideas?
Ram is 60mm cylinder is 85mm what do you think wall of cylinder would be ? I'm more used to double acting rams where piston is bigger than ram I guess on this bore will equal ram size.

 

[dieselsamurai]

Just done the calculations and at 700bar 60mm piston its 19.86 tons

usfull site

https://www.sensorsone.com/piston-cylinder-pressure-and-diameter-to-force-calculator/

 

[dieselsamurai]

making an adapter to go on end of ram as threads are knakered and will be a pain to strip ram down to bore out center



will have a 1" bore so some of the tooling i already have fits

 

[dieselsamurai]

Finally got some time to make adapter today








decided to make it with a spring return as ram takes ages to return without assitance

 

[dieselsamurai]

Against popular opinion I decided to base the table on 2 bits of 6x6 RSJ and was a good test for my bandsaw, came out really straight so pleased about that I really didnt fancy my chances of it being that accurate with a petrol saw !