www.wilausa.com sales: 1-888-696-9452 WE LIVE PRESS BRAKE PRODUCTIVITY 140 ALL SORTS OF INFORMATION AIR BENDING TONNAGE CHART Required press force at 90° air bending, force in t/m. The charts below give the appropriate tonnage to air bend mild steel. Bending force for other metals: Soft aluminium : Tons per unit length x 50% Aluminum alloys heat treated : Tons per unit length x 100% Stainless : Tons per unit length x 150% Bottoming : Tonnage requirements are three to five times greater than for air bending. s = Material thickness F = Tons per meter of workpiece ri = Inside radius of formed part v = V-die opening B = Minimum flange s F ri v B Metric V (mm) 4 6 8 10 12 16 20 24 30 40 50 60 80 100 120 160 V (inch) 0.157" 0.236" 0.315" 0.394" 0.472" 0.630" 0.787" 0.945" 1.181" 1.575" 1.969" 2.362" 3.150" 3.937" 4.724" 6.299" B (outside mm) 2.8 4.2 5.6 7 8.6 11.5 14.4 17 21 29 36 42.4 56,5 71 85 114 ri (mm) 0.6 1 1.2 1.5 1.8 2.4 3 3.6 4.5 6 7.5 9 12 15 18 24 Material Thickness mm 0.5 TONS PER METER 4 2 1 10 8 5.5 4.5 1.2 16 12 9 7 1.5 20 14 11 8 6 2 22 15 11 9.5 2.5 25 19 15 11 3 28 22 17 12 4 44 33 22.5 17 5 55 37 29 22 6 58 42 34 8 83 65 45 35 10 110 75 57 45 12 116 85 68 14 121 91 68 15 143 112 79 16 168 131 90 18 172 119 20 222 150 25 254 Inch V (mm) 6.4 9.5 12.7 15.9 19.05 22.2 25.4 28.6 31.8" 38.1 50.8 63.5 80 100 120 160 V (inch) 0.250" 0.375" 0.500" 0.625" 0.750" 0.875" 1.000" 1.125" 1.250" 1.500" 2.000" 2.500" 3.150" 3.937" 4.724" 6.299" B (outside inch) 0.167" 0.265" 0.354" 0.442" 0.530" 0.619' 0.707" 0.795" 0.866" 1.06" 1.414" 1.768" 2.224" 2.795" 3.346" 4.488" ri (inch) 0.038" 0.056" 0.075" 0.094" 0.113" 0.131" 0.150" 0.169" 0.188" 0.225" 0.300" 0.375" 0.472" 0.591" 0.709" 0.945" Material Thickness Gauge Inches 20 0.036" TONS PER FOOT 3.2 2.0 18 0.048" 5.1 3.4 2.7 2.4 16 0.060" 5.8 4.0 3.1 2.5 14 0.075" 6.9 5.0 4.0 3.5 12 0.105" 8.3 6.9 5.6 11 0.120" 9.9 8.2 7.2 5.4 10 0.135" 11.9 9.9 7.3 7.1 5.8 3/16" 0.188" 14.3 14.2 12.2 7.5 1/4" 0.250" 23.7 16.5 11.4 5/16" 0.313" 27 19.7 3/8" 0.375" 42.3 30.9 22.8 16.9 7/16" 0.438" 32.2 24.3 19.4 1/2" 0.500" 34.6 27.0 18.3 5/8" 0.625" 47.1 32.0 3/4" 0.750" 74.2 50.4 7/8" 0.875" 73.9 1" 1.000" 103.0 ALL SORTS OF INFORMATION
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