Motor for 250 ton mechanical press
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Re: Motor for 250 ton mechanical press
Re: Motor for 250 ton mechanical press -- Kulu	Post Reply	Top of thread	Forum

Posted by: randykimball ® 03/28/2007, 00:03:45 Author Profile eMail author Edit

You have ask a question that requires many other questions to be answered. What kind of mechanical? crank case, leverage, brake press, punch press ...?? What gear ratio is to be used between the motor and the crank? What sized flywheel? How heavy is the ram? How long are the journal rods? What length of stroke is it? Some large mechanical presses have quite small motors, it is all done with gear reduction, crank size, and flywheel mass. This is one of the greatest advantages of a mechanical brake press. One very serious disadvantage is the difficulty of stopping the ram in mid stroke in the event that a body part gets into the pinch point. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. Modified by randykimball at Wed, Mar 28, 2007, 00:05:49

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Re: Re: Motor for 250 ton mechanical press
Re: Re: Motor for 250 ton mechanical press -- randykimball	Post Reply	Top of thread	Forum

Posted by: jboggs ® 04/02/2007, 19:23:17 Author Profile eMail author Edit

I always assumed that the tonnage rating had to do with the strength of the mechanical structure (crankshaft, bearings, journals, sidewalls, etc.) rather than anything to do with the rotary input power. If that were the case, then you could raise the "rating" of a press just by putting a bigger motor on it, and I don't think you can do that. In other words, while the motor size is related to the tonnage of the press, I don't think it DETERMINES the tonnage of the press.

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