On Saturday, February 21, 2009 at 10:58:33 AM UTC-6, Proctologically Violated©® wrote:
Awl --

In particular, how does one size the motor/pump for a given tonnage? Say,
10 tons. Is tonnage the only issue? See below.

My buddy needs one made, is getting a price, but it seems like the price
keeps climbing, and they are claiming he needs 7.5 hp for 10 tons.

We had a Daco 55 ton press, and I'd swear that press had only mebbe a 1-2 hp
motor.

BUT, it operated very slowly.

I would imagine for a *faster* stroke at a given tonnage, hp increases, as
the hydraulic "mechanical advantage" is probably decreasing with increased
speed, so a bigger motor is req'd.

How to calc??

Iny links to DIY sites around?

Thanks,
--

Mr. PV'd

Mae West (yer fav Congressman) to the Gangster (yer fav Lobbyist):
Hey, Big Boy, is that a wad (of cash) in yer pocket, or are you just
glad to see me??

http://www.surpluscenter.com/Tech-He...sp-HP-GPM-RPM/

http://www.surpluscenter.com/Tech-He...eed-Torque-HP/