AIR BENDING FORCE CHARTIf material thickness t is known the recommended Vopening can be selected using following formulas:tV(0...3) mm6 t(3...8) mm8 t(8...12) mm10 t12mm or more12 tConsidering t, V and tensile strength Rm [N/mm 2 ] of sheet material,the table below shows the most important bending data:1. Minimum bendable flange length bmin2. Bending radius ir on the sheet metal3. Pressure F in KN required for 1 metre bending length.The tables are for mild and stainless steel. For other type of materials,please use the mild steel table with multiplier k=Rm/450Back toindex70V 4 6 7 8 10 12 14 16 18 20 25 32 40 50 63 80 100 125 160 200 250bmin 2,8 4 5 5,5 7 8,5 10 11 13,5 14 17,5 22 28 35 45 55 71 89 113 140 175ir 0,7 1 1,1 1,3 1,6 2 2,3 2,6 3 3,3 4 5 6,5 8 10 13 16 20 26 33 41t for mild steel Rm≈450 N/mm 20,5 40 300,6 60 40 40 400,8 70 70 50 401,0 110 100 80 70 601,2 140 120 100 80 70 601,4 150 130 110 100 90 801,5 170 150 130 110 90 801,6 170 150 130 110 100 902,0 220 190 170 150 130 1102,3 250 230 190 170 150 1202,6 280 250 220 180 1403,0 340 300 240 190 1503,2 340 270 220 170 1403,5 330 260 200 160 1304 430 340 270 210 1704,5 440 340 270 2105 520 420 330 260 2106 600 480 380 300 2407 520 410 330 2609 670 540 43010 850 670 530 42012 960 780 600 55016 1360 1070 86019 1500 1250 100022 1600 130025 2100 170030 2400t for stainless steel Rm≈700 N/mm 20,5 60 500,6 90 60 60 600,7 120 80 80 60 600,8 110 110 80 700,9 130 120 100 80 701,0 170 150 120 110 801,2 210 180 150 120 110 901,5 200 170 150 130 1202,0 330 290 260 230 200 1702,5 390 350 300 250 1903 510 450 360 290 2304 650 510 410 320 2605 780 630 500 390 3206 900 720 570 450 3608 1020 810 650 51010 1280 1010 800 63012 1440 1170 900 83015 1800 1410 114020 2500 2080 167025 3150 255030 3600
RETURN BEND LIMIT GRAPHPUNCH 804Back toindexEarprofile10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180