FIGURE 23
PAGE 54
COMPARED TO 65,000 P.S.I. TENSILE MILD STEEL ON CHART:
BENDING PRESSURES REQUIRED FOR OTHER METALS AS
WITH RADIUS ON MALE DIE EQUAL TO METAL THICKNESS, AND ARE CONSIDERED IDEAL FOR RIGHT ANGLE BENDING.
PRESSURES HIGHLIGHTED ARE FOR DIES WITH FEMALE DIE OPENINGS APPROX. 8 TIMES METAL THICKNESS,
WIDTH OF V-DIE OPENING
PRESSURE IN TONS PER LINEAR FOOT REQUIRED TO MAKE 90 DEGREE AIR BEND IN MILD STEEL
3/4
10.5
7.4
5.4
3.4
2.2
1.3
1.0
7/8
3/4
1.00
.875
.750
1.01.21.72.22.9.03620
.1509
7/16
5/8
1/2
3/8
5/16
1/4
7
.625
.500
.438
.375
.313
.250
.188
13
11
10
12
16
14
18
.090
.135
.120
.105
.075
.060
.048
4.0
5.6
2.9
6.8
10.1
4.5
2.7
1.6
3.6
6.0
2.2
1/4
OF METAL
THICKNESS
GAUGE INCHES
5/16
3/8
5/81/2
CHROME MOLYBDENUM........100% MORE THAN STEEL
STAINLESS STEEL...........50% MORE THAN STEEL
SOFT ALUMINUM..........50% OF PRESSURE LISTED
SOFT BRASS.............50% OF PRESSURE LISTED
92.0
90.0
63.0
42.2
112.2
80.0
52.2
104.0
69.0
76.0
52.5
36.0
56.2
39.4
27.0
44.0
31.2
21.0
38.0
22.0
11.2
6.7
8.6
4.3
3.2
16.4
11.913.1
28.8
14.0
9.0
3.74.3
8.8
11.3
6.3
7.2
9.6
5.4
1.7
3.0 2.5
2.93.3
7.0
5.4
4.0
6.2
8.4
4.4
2.1
47.9
35.0
24.0
16.0
4.5
41.0
45.2
29.9
26.0
15.3
7.6
5.2
19.2
11.5
5.8
3.5
69.5
39.0
28.0
19.4
58.0
33.1
24.0
16.0
12.5
7.59.1
10.6
6.2
4.1
3.2
BRAKE TONNAGE CHART
1-1/21-1/8
7/8
1 1-1/4 2 2-1/2 3-1/23 4
26.0
15.6
11.1
32.4
19.0
14.6
42.2
24.0
17.0
12.3 9.3
7.6
23.0
12.7
16.5
75 6 8 10 12
ALUMINUM ALLOYS (HEAT TREATED) ..SAME AS STEEL
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