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  1. Hello fellow press enthusiasts! I'm looking at making a C-frame hydraulic press, as I have recently obtained a Ø6.3-in single-acting hydraulic cylinder. At 2000psi that's 28t, 2500, 35t and 3000, 42t, so it ought to have enough force to be a handy gizmo. There is still some experimentation needed to determine what the cylinder can actually handle before I settle on the system pressure, hence the range of pressure and force noted in the preceeding... Chasing a maximum ram speed of 2 1/2-in per second Retraction of the large single-acting cylinder is already figured out, so don't worry about the fact that the "pusher" is only a one-way item Having considered such configurations as H-frame, four post, inverted [ram pushing up that is] and so on I think, for what I plan on using it for, a C-frame gives the best access and clearest die and tooling space. After all, it the most common frame type for hammers, be they pneumatic or spring types Considering making it capable of using dies from one of my hammers by machining the rod end to accept those dies, as it saves on making numerous dies from scratch... Tapered key and dovetail fixing I read on a forum here recently that there is a thorough dissertation in an early version of Machinery's Handbook on the design of C-frame presses and was hoping someone might have a volume from which they can copy the relevant section. I think it was pp270-on in the 1922 edition... Should be no issues with copyright, as such a small amount of the book constitutes less that the 'fair study' provisions contained in most jurisdictions Either post here or PM me if you can help please. Happy to share the build on this site once I get my head around the section sizes needed from the calcs. Considering a throat of 30-in, as that will reach to the centre of a standard sheet plus a bit on the short dimension. Yair, I know it will induce a rather large moment into the frame and that's the bit I need some theoretical data on; no point making a press that bends so far in use that it become useless, so the deflection needs to be kept to a minimum of course As it is really re-inventing a well-spun wheel, is there anyone who has already done this style of press with this amount of force? Regards Jim Deering
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