When you face the problem of buying a new press brake but you are not sure about the Tonnage (Bending force), this article is right for you.
The Press Brake Tonnage Calculator is based on the practicle using of bending works, which can be used to calculate the Tonnage. There are several factors need to be considered such as the friction of the material on the matrix, thickness of the the material and actual tensile strength.

The table of Press Brakes Tonnage

v 4 6 8 10 12 14 16 18 20 24 28 32 36 40 45 50 55 60 65 70 80 90 100 120
b 2.8 4 5.5 7 8.5 10 11 12.5 14 17 20 22 25 28 31 35 38 42 46 49 56 63 70 85
r 0.7 1 1.3 1.6 2 2.3 2.6 3 3.3 3.8 4.5 5 6 6.5 7 8 9 10 10.5 11 13 14 16 19
s 0.5 4 3                                            
0.6 6 4 3 3                                        
0.8   7 5 4 3                                      
1   11 8 7 6                                      
1.2     12 10 8 7 6                                  
1.5       15 12 11 9 8                                
2         22 19 17 15 13 11                            
2.5             25 22 20 17 15 13                        
3               33 29 25 21 18 16                      
3.5                 40 33 29 25 22 20 18                  
4                   44 37 33 29 26 23 21                
4.5                     47 41 37 33 30 27 25              
5                       51 45 40 36 33 30 27 25          
6                             52 47 43 39 36 34 30      
8                                   70 64 60 52 46 42  
10                                         81 72 65  
12                                             95 78
14                                             130 106
press brakes pressure

P-The pressure of the press brakes (Tonnage)
s-Thickness of the plate
V-Width of the matrix

To calculate the power you want
You only need to know the thickness of the plate you want to bend, and the length of the plate, also the open width of the matrix ( you can find a suggest value in table 1 ), input the 3 data, and then click the calculate button, the press force( tonnage ) will be calculate automaticly by the program.

Material Thickness (mm) - s
Plate Length (meter) - L
Metrix Width (mm) - v