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)
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