PRODUCT IMAGES
01 150x150
02 150x150
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PUNCHES & DIES
  • Amada – CNC
  • Murata-Wiedemann – CNC
  • Whistler

CALCULATING PUNCHING TONNAGE

To calculate punching tonnages use the following shear strength value chart with either the Inch or Metric formulas. To ensure safe operation,
it is recommended that any questionable tonnage conditions be reviewed thoroughly with your press manufacturer.

MATERIAL

TONS PER SQ INCH

METRIC TONS PER SQ CM

Aluminum 1100-0
3003-0, 6061-0

5.0

0.71

Aluminum 2024-0
3004-H36, 5052-H32

10.0

1.41

Brass & Aluminum
2025-T6, 6152-T6

17.5

2.46

Mild Steel & Bronze

27.5

3.87

Stainless Steel

55.0

7.74


CALCULATING DIE CLEARANCE

Die clearance is related to the type and thickness of the material being punched. For mild steel (AISI 1010 or equivalent) we recommend using 10% of material thickness (5% per side) added to the punch size, when punching up to .25" (6.35 mm) thick material. Clearance should be doubled when punching thicker materials, or when punching Stainless Steels. Use 8% (4% per side) when punching light gage softer materials, like aluminum or copper.  Example: To punch a .500" (12.7 mm) diameter hole in 11 GA (.120" / 3 mm) mild steel, the die size will be .512" (13 mm). (10% x .120 = .012 + .500 = .512).

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