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How To Reduce Tonnage

There are a variety of ways to reduce the required press tonnage.

Use Tonnage Compensator Caps – Stagger the punch length so that the punches pierce the material at different intervals
Add Punch Shear  – A shear angle ground onto the punch tip reduces the load or tonnage unlike flat faced punches
Use correct die clearance – This results in a balance of punching force, good hole quality and increased tool life
Sharpen punches & dies often


Tonnage Compensator Caps
Are your punching capabilities limited by the tonnage
of your press or press brake? UniPunch has a solution.
Compensator caps stagger the punch length so that the
punches pierce the material at different intervals, reducing
the required punching tonnage. They are fastened to the
punch heads of “A” and “AJ” series units to reduce the total
punching load required for multiple holes.


UniPunch Unit  Compensator Cap
Part Number

 A-1, A-1 1/4,
AJ-1, AJ-1 1/4
1040
 A-1 1/2,
AJ-1 1/2
1041
 A-2,
AJ-2
1042

For more information on tonnage, click here.


Punch Shear
Chisel shear on punches can considerably reduce required press tonnage. UniPunch offers Chisel Shear, 4-Way Shear and Concave Shear.
  

  Chisel Shear  4-Way Shear Concave Shear

The chart below shows tonnage reduction factors for the shear depths listed. Multiply shear factor times actual tonnage to obtain reduced tonnage per hole.