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Micro-Sized, Oil-Free, 10, 30, 60, 120 Ton High Velocity Presses For The Automation Industry
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Re: Physics

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Posted by Jerry Prasad (65.73.4.234) on December 13, 2003 at 18:15:24:

In Reply to: Physics posted by Jason on October 02, 2003 at 10:53:47:

I'm having a problem understanding this Bullet Press. Here's where I am:

I understand that to punch a 2-inch square hole in mild steel with shear strength 25 tons and thickness of 0.10 inches the formula is:

F = S * T * L

where
F = cutting force needed (in tons)
S = shear strength (in tons)
T = thickness (in inches)
L = the length of the perimeter being cut

So

F = 25 * .10 * 8

F = 20 tons of cutting force needed.

NOW .......

Here's my question. How could this little press of yours possibly produce 20 tons of cutting force? How much does it weigh? What is the physics here?

Thanks for your answer.

## Jerry



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