Technical Data

To Calculate Required Tonnage for
Pierce and/or Blank Operations


  • Total the linear inches of cut.
  • Multiply this total by the material thickness.
  • Multiply the number by the material shear strength in
    pounds per square inch (PSI).
  • Divide by 2000 (lbs/ton) for the number of tons required.

( _____ inches x thickness x PSI shear divided by 2000 = tonnage)

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To Determine a Scaled Dimension

inches x scale = _____ divided by 12 = _____ feet

Examples:
8.75 inches x 16 (1/16 scale) = 140.00 divided by 12 = 11.66 feet
1.00 inches x 16 (1/16 scale) = 16 divided by 12 = 1.333 feet

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Typical Material Shear Strength (PSI)

"Soft" Aluminum, Brass or Copper - 30,000 to 40,000 PSI
"Hard" Aluminum or Brass and Low Carbon Steel - 40,000 to 60,000 PSI
"Mild"/"Medium" Carbon Steel - 50,000 to 80,000 PSI
Stainless Steel (1/4 to Full Hard) - 60,000 to 145,000 PSI
"Hard" Bronze, High Carbon Steel, Spring Steel - 100,000 to 200,000 PSI
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Conversions and Calculations

1 millimeter (mm) = .03937 inch (in)
_____ mm x .03937 = _____ inch
_____ in divided by .03937 = _____ mm

To Calculate Required Tonnage for Pierce and/or
Blank Operations


  • Total the linear inches of cut.
  • Multiply this total by the material thickness.
  • Multiply the number by the material shear strength in
    pounds per square inch (PSI).
  • Divide by 2000 (lbs/ton) for the number of tons required.

( _____ inches x thickness x PSI shear divided by 2000 = tonnage)