Hydraulic ( was surplus pneumatics ( was Re: Sources for beltsand pulleys

not to mention, it is quieter and you can buy stuff off the shelf
rated for high pressures.

problem is that he mentioned shipping, not an easy task with
hydraulics.


one note (mixing responses...) 250 KPA (SI units) is about 45 PSI.
maybe there is something lost in the translation ?

Dave




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Jeff Goldberg" <jeff@w...>
wrote:

> Guys:
>
> I didn't read the whole thread, so this suggestion may be off the

wall.

> Have you considered hydraulic, rather than pneumatic? It's slower,

but

> 10,000 psi (and much higher) is fairly common. While it doesn't

make that

> fast punch, Greenlee, Enerpac and others make large punches

designed to go

> through some pretty thick material.
>
> Regards,
> Jeff
>
> -----Original Message-----
> From: hllrsr@c... [mailto:hllrsr@c...]
> Sent: Monday, May 05, 2003 6:00 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] surplus pneumatics ( was Re: Sources

for

> beltsand pulleys
>
>
> Alex,
> 250 psi? Don't be thinking so! Try 100 to 150 psi MAX!
> If you can generate 250 with an industrial compressor it's going to

be a

> multi stage pump which is alot more money (and pressure) than most

shops are

> ever going to need. If you need that pressure, use a small booster

inline to

> kick the pressure up for the cylinder, or go with a larger piston

and

> smaller contact area on your punch.
>
> Psi * piston area = available force
>
> Also, Health and Safety are going to be all over your butt if you

run a

> system like that and it isn't properly certified!
>
> Iain
> Maintenance department
> Bateman Mfg.
> Barrie Ontario.
>
> alex wrote:
> >
> > Hi, Chris!
> > Thank you for a feedback!
> > Down here, in Ontario 250 psi is about normal for air - nobody is
> > complaining so far...
>
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