"Jim Wilkins" writes:

"Richard Smith" wrote in message ...

Hello again all

I need to get advice.
I need a portable hydraulic pump & cylinder combination
- hand pump
- oil pressure gauge
- hydraulic cylinder(s)

because

* blowing someone else's hydraulic seals makes you "persona less
grata"

* the fillet weld tests break abruptly, which is cruel to repeatedly
do to someone's "shop" press

so, as I can see a lot more tests to do - plus other applications for
a hydraulic jack - I need to get my own kit.

The oil pressure gauge is to give a "Force=pressure*area" estimate of
Force being applied in the tests.
Plus other uses. eg. you could be tensioning bolts.

I've done calculations, and in view of experience I have, this is the
"bottom line" - the biggest cylinder needed
v
50Tonne cylinder with 50mm stroke.

Any good advice?

Rich Smith

=======================================
I think the best answer is to acquaint yourself with local small
hydraulics shops and ask them. Several of the owners were happy to
find another creative tinkerer and showed me all the stuff they'd
designed and built.

A hydraulic press is a particularly easy machine to build or modify if
you have the means to cut and drill structural steel. I'd record the
dimensions of the channels and bolts of the 50 ton press you used and
look for cutoffs from a steel fabricator.

Hand pumps can be found in real or fake Porta-Power kits and Greenlee
punches, however I haven't seen 2-speed hand pumps except on 50 ton
presses and manual log splitters. Powered log splitters do have
2-speed gear pumps, actually separate wide and narrow gear pairs. A
valve bypasses the wide pair at high pressure.

Do you have British suppliers like these where much of my hydraulic
kit came from?
https://www.northerntool.com/

https://www.baileyhydraulics.com/

Hiya.

I've already learned a lot of useful things from looking at those
suppliers. I don't think there's anything quite like "Princess Auto"
which I saw in Canada.

Locally we have a hydraulics supplier - met them doing runs for boat's
hydraulic steering gear.
https://www.dereklane.co.uk
Derek Lane & Co
on the Heathfield trading estate near Newton Abbot, here in Devon.
I've called by.
To an extent, that's why I'm asking here.
What should I be asking them for? They have a lot of stuff, and many
big industrial customers, so I need to have a good idea and and get
very close to the final solution - within reach of them being able to
suggest detailed optimisation.

There are bigger "lifting gear suppliers" used to online trading which
I can also reach to.

Regards,
Rich Smith