PRESS BRAKE BENDING CHART

Tons required per foot to bend mild steel having max 72,000 PSI
tensile strength and max 40,000 PSI yield strength.
 

Thickness of metal

Width of V die opening

Gauge

Inches

1/4"

5/16"

3/8"

7/16"

1/2"

5/8"

3/4"

7/8"

1"

1-1/8"

1-1/4"

1-1/2"

2"

2-1/2"

3"

3-1/2"

4"

5"

6"

7"

8"

10"

12"

20

0.036

3.72

2.76

2.04

1.68

1.32

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

18

0.048

6.36

4.80

3.60

3.00

2.64

2.04

1.56

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

16

0.060

11.52

8.52

6.72

5.40

4.56

3.36

2.64

2.16

1.80

-

-

-

-

-

-

-

-

-

-

-

-

-

-

14

0.075

-

14.28

11.04

9.12

7.56

5.64

4.20

3.60

3.00

2.52

2.16

-

-

-

-

-

-

-

-

-

-

-

-

12

0.105

-

-

-

20.04

15.72

11.64

9.60

7.80

6.72

5.52

4.92

3.84

-

-

-

-

-

-

-

-

-

-

-

11

0.120

-

-

-

-

23.04

17.04

13.32

10.80

9.00

7.56

6.60

5.28

3.48

-

-

-

-

-

-

-

-

-

-

10

0.135

-

-

-

-

-

22.32

17.40

14.28

11.88

10.20

8.76

6.96

4.80

-

-

-

-

-

-

-

-

-

-

3/16"

0.188

-

-

-

-

-

-

32.88

27.72

23.16

19.68

17.16

13.44

9.00

6.84

5.28

-

-

-

-

-

-

-

-

1/4"

0.250

-

-

-

-

-

-

-

-

47.28

39.96

35.40

27.24

18.48

13.68

10.80

8.88

7.32

-

-

-

-

-

-

5/16"

0.313

-

-

-

-

-

-

-

-

-

-

60.48

47.76

32.40

23.64

18.36

15.24

12.60

9.24

-

-

-

-

-

3/8"

0.375

-

-

-

-

-

-

-

-

-

-

-

73.92

50.76

37.08

28.80

23.52

19.56

14.76

11.40

-

-

-

-

7/16"

0.438

-

-

-

-

-

-

-

-

-

-

-

-

74.04

54.96

42.48

34.32

29.28

20.76

17.76

13.44

-

-

-

1/2"

0.500

-

-

-

-

-

-

-

-

-

-

-

-

-

76.32

58.56

47.64

39.96

29.52

23.28

19.08

15.72

-

-

5/8"

0.625

-

-

-

-

-

-

-

-

-

-

-

-

-

-

103.44

84.00

69.96

51.72

39.96

32.88

27.96

20.28

-

3/4"

0.750

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

132.00

111.60

82.44

64.20

52.32

43.80

32.52

25.20

7/8"

0.875

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

164.40

124.80

96.84

77.52

63.48

47.64

37.92

1"

1

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

171.60

135.60

109.44

91.44

67.56

53.04

The tonnages indicated in black boxes are for die openings 8 times thickness of metal up 1/4" and 10 times thickness of metal recommended above 1/4" in red boxes.

The inside radius of a right angle bend is approximately equal to the thickness of the material