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Diameter / mean bending radius (Rm), approximate figures, (all figures in mm)

Mandrel bend:

Round tube: Rm > 1,5 x D (standard formula, exceptions to this rule to be agreed)
6 19
8 11, 15, 19
10 20, (25), 40
12 25, 26, (35), 73, 96
13 30, 60
14 37, 5, 52
15 30, (45)
16 30, 35, 43, 49, 80
18 30, 38, 49, 52,5, 60, 80, (84)
20 30, 35, 40, 45, 50, 60, 67, 75, 100
21 50
21,3 79, 84
22 35, 41, 44, 55, (61), 65, 71
24 50, 92, (160)
25 42,5, 50, 53, 55, (62,5), 66, 75, 87,5, 110, 140, 190, 303
26 54
26,9 77, 225
27 46, 63,5, 75, 86
28 64, 73,5, (82,5)
29 35
30 60, 80, 112
32 87,5
33,7 49, 75
34 85, 100, 200
35 75, 85
38 130
39 ?
40 80, 90, 160, 210
42,4 84
48,3 130
50 100, 150
56 120
60,3 125, 150, 200

Maximum bend realised to date: 60 x 4.0 in ST 52 steel NBK


Square, rectangular and flat oval tubing: R > 4 x Edge length
(standard formula, exceptions to be agreed)

QR 15 x 15 60
RR 20 x 10 55
RR 20 x 15 60
QR 20 x 20 37,5, 65, (180)
QR 30 x 30 120
FO 34 x 16 57
RR 35 x 20 50
FO 40 x 20 80
RR 55 x 34 100
RR 60 x 20 50
   

Press bends without mandrel
Available pressure dies: " - " - 1" - 1. " - 1. " - 2" - 2. " - 3"

Roller-type bending:
Round tubing: R > 10 x D (standard formula, exceptions to be agreed), adjustable 

D 16
D 22
D 25
D 26
D 30
D 38
D 40
D 42
D 50
D 60 currently being prepared
   
In addition, flat steel, angles, as well as rectangular and square tubes can be
bent with available rollers.

Bending to the dimensions stated in brackets is possible after slight modification
of our current bending machines.The radiuses stated above are to be considered
as "approximate" values only, since different tube batches have different springbacks.

The tubes' different inside diameters require suitable bending mandrels and we
can offer our customers a large range of different mandrel assemblies

Although we are continuously enlarging our range, we kindly ask you to make
use of our already available bending tools whenever possible, since this is the
most favourable solution for both supplier and customer.

We of course are always prepared to calculate reference prices for you.