Dowling Metal Products

Air Bending Chart for Mild steel Rm=450N/mm2

Die opening V		4	6	7	8	10	12	14	16	18	20	25	32	40	50	63	80	100	125	160	200
Minimum bend length bmin		2.8	4	5	5.5	7	8.5	10	11	13.5	14	18	22	28	35	45	55	71	89	113
Bending radius r		0.7	1	11	1.3	1.6	2	2.3	2.6	3	3.3	4.0	5.0	6.5	8	10	13	16	20	26
Thickness	0,5mm	40	30
	0,6mm	60	40	40	40
	0,8mm		70	70	50	40
	1,0mm		110	100	80	70
	1,2mm			140	120	100	80	70	60
	1,5mm				170	150	130	110	90	80
	2,0mm						220	190	170	150	130	110
	2,5mm								280	250	220	180	140
	3,0mm									340	300	240	190	150
	3,5mm											330	260	200	160	130
	4,0mm											430	340	270	210	170
	4,5mm												440	340	270	210
	5,0mm												520	420	330	260	210
	6,0mm												750	600	480	380	300	240
	7,0mm															520	410	330	260
	8,0mm															850	680	530	430
	9,0mm																670	540	430
	10mm																850	670	530	420
	12mm																	960	780	600	550
	15mm																			950	750

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Air Bending Force Chart