b
Press Brake
e
e
e
e
Hemming Tonnages b h b 1 2 b h b 1 2 a e h b e h e e
e
h
h
e
h
h
e
e
e
b
h
b 1 2
b
a
2 b 2 2 b 2
e
e
e
r
r
e
e
r
r
b
r
r
r
b
Hemming is a form of bending requiring higher amounts of tonnage than standard Air Bending. The tables below show the tonnage required for hemming and seaming operations. Mild Steel e r r e 2 e 1 a r e 1 e 2 b r e r r e 2 e 1 a
b
e 1 e 2
b
h
b
h
2r
Bending Shape
2
e 2 e 1
e 2 e 1
r
2t
c
r
2t
Sheet Thickness (mm)
c
r
r
Required Tonnage
C
Required Tonnage
2t
b
0.6 0.8 1.0 1.2 1.6 2.0 2.6 3.2 4.5 r
9.0
3.0 3.0 3.5 3.5 3.5 5.5 6.5 8.0 e
23.0 32.0 40.0 50.0 63.0 80.0 90.0
1.2 1.6 2.0 2.4 3.2 4.0 5.2 6.4 9.0
12.0 15.0 17.0 24.0 30.0 55.0 70.0 b
e
e
e
e
h
e
h
h
h
e
h
h
h
e
e
e
b
b 1 2
b 1 2
b
h
b 1 2
b
h
b
a
a
2 b 2 2 b 2
e
e
e
e
e
e
r
r
e
100.0 200.0 r
e
r
b
r
105.0
11.3
r
b
r
b
b
Note: Required tonnage is given per 1 metre length e 1 a
r
e 1
a
r
r
r
e 2
e 1 e 2
e
e 2
r
e 1 e 2
Stainless Steel
e
b
h
b
h
2r
Bending Shape
2
e 2 e 1
e 2 e 1
r
2t
c
r
2t
Sheet Thickness (mm)
c
r
r
Required Tonnage
C
Required Tonnage
2t
0.6 0.8 1.0 1.2 1.5 2.0 2.5 3.0 4.0
15.0 20.0 25.0 26.0 38.0 50.0 90.0
3.0 3.0 3.5 3.5 3.5 5.5 6.5 8.0
35.0 50.0 60.0 80.0 95.0
1.2 1.6 2.0 2.4 3.0 4.0 5.0 6.0 8.0
130.0 180.0 210.0 280.0
100.0 140.0
11.3
Note: Required tonnage is given per 1 metre length
162
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