Hey guys new to the site and looking at getting a punch for putting holes in some Chassis brackets I make and not sure what I need to look for. I'm looking at a 20 ton mechanical punch press to see if it will work I'm needing to put 1/2 holes in 3/8 steel plate would be the biggest and thickest I need to work with. Will a 20 ton do what I need? Thanks for any help
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20 ton press punch questions
- Thread starter Rjays32
- Start date
- Replies 3
- Views 1,112
Dennisrech
Aluminum
- Joined
- Feb 16, 2012
- Location
- Olympia WA
0.5inches x 3.14 x .375 inches x 44,000 pounds per square inch = 23,550 pounds.
Should be OK.
Change the 44,000 psi to the shear strength of your steel.
matt_isserstedt
Diamond
- Joined
- Dec 15, 2003
- Location
- suburbs of Ann Arbor, MI, USA
Dennis has it listed. I carry the equation LTS/2000 in my head for general punching.
L = length of perimeter in inches
T = thickness in inches
S = strength of material, used to be 36,000 psi for "typical steels" but now 50ksi is a better number.
The divide by 2000 just gets you from lbs into tons.
Give good respect to mechanical presses, they work but they are a bit scary!
L = length of perimeter in inches
T = thickness in inches
S = strength of material, used to be 36,000 psi for "typical steels" but now 50ksi is a better number.
The divide by 2000 just gets you from lbs into tons.
Give good respect to mechanical presses, they work but they are a bit scary!
Thanks guys this is all new to me just want to make sure I get the right tool and Don't get hurt using it. Thanks again
