Menu:
Post Machines Wanted - Charts  - Contact Us 
Home | Gallery | New Machines | Used Machines | Parts/Tooling | Leasing | Service | Advertising
Inquire & Order Parts
Iron Worker Punches & Dies Inquiry
Shear Blades Inquiry

Charts -- Shearing

Tons pressure required to punch mild steel plate shearing strength : 25 tons / po2

To shear  1''

Metal thickness

Hole diameter (inch)

 

Gauge

Inch

1/8

3/16

5/16

3/8

7/16

9/16

5/8

11/16

13/16

7/8

15/16

1

0.93
1.24
1.56

20
18
16

0.036
0.048
0.060

.35
.47
.59

.53
.71
.89

.71
.94
1.2

0.88
1.2
1.5

1.1
1.4
1.8

1.2
1.7
2.1

1.4
1.9
2.4

1.6
2.1
2.7

1.8
2.4
2.9

1.9
2.6
3.2

2.1
2.8
3.5

2.3
3.1
3.8

2.5
3.3
4.1

2.7
3.5
4.4

2.8
3.8
4.7

1.94
2.72
3.12

14
12
11

0.075
0.105
0.120

.74
1.0
1.2

1.1
1.6
1.8

1.5
2.1
2.4

1.9
2.6
3.0

2.2
3.1
3.5

2.6
3.6
4.1

2.9
4.1
4.7

3.3
4.7
5.3

3.7
5.2
5.9

4.1
5.7
6.5

4.4
6.2
7.1

4.8
6.7
7.7

5.2
7.2
8.3

5.5
7.7
8.8

5.9
8.3
9.4

3.5
4.68
6.23

10
3/16''
1/4''

0.135
0.187
0.250

 

2.0
2.8

2.7
3.7
4.9

3.3
4.6
6.2

4.0
5.5
7.4

4.6
6.5
8.6

5.3
7.4
9.8

6.0
8.3
11.0

6.6
9.2
12.3

7.3
10.2
13.5

8.0
11.1
14.8

8.6
12.0
16.0

9.3
12.9
17.2

10.0
13.8
18.5

10.6
14.8
19.7

9.37
12.50
15.60
18.75

3/8''
''
5/8''
''

0.375
0.500
0.625
0.750

 

 

 

 

11.1

13.0
17.2

14.8
19.7

16.6
22.1

18.5
24.6
30.8

20.3
27.1
33.8

22.1
29.5
36.9
44.3

24.0
32.0
40.0
48.0

25.8
34.4
43.0
51.7

27.7
36.9
46.1
55.4

29.5
39.4
49.2
59.0

**If punches are stepped one-half of the metal thickness or more, the total pressure is divided by the number of punch levels.

Multipliers for computing punching  & blanking tonnages of other materials

Aluminum :
-
Soft : 0.30
- Hard half : 0.40
- Hard sheet : 0.50
Brass :
- Soft sheet : 0.60
- Half hard : 0.70
- Hard sheet : 0.80
Duralumin :
- Soft sheet : 0.60
- Treated : 0.70
- Treated & cold rolled : 0.80

Bronze :
- Phosphore soft sheet : 0.80
Copper :
- Rolled : 0.55
Iron :
- Wrought : 0.80
Monel metal :
- Rolled sheet : 1.30
Tin :
- Rolled sheet : 0.10
- Sheet steel coated : 1.00

Steel :
- 0.10 carbon : 0.90
- 0.50 carbon : 1.40
- 0.75 carbon : 1.60
- 1.00 carbon : 1.70
- 1.20 carbon : 1.90
- 1.20 carbon (tempered) : 3.80
- Angle iron: 1.15
- Silicon : 1.50
- Stainless 18.8 : 1.60
- Nickel (3 %) : 1.65
- Nickel (5 %) : 1.70

U.S. Standard gauge (for uncoated sheets)

Gauge

Lb/ft2

thickness

Gauge

Lb/ft2

thickness

Gauge

Lb/ft2

thickness

Gauge

Lb/ft2

thickness

8
9
10
11
12
13

6.875
6.250
5.625
5.000
4.375
3.750

0.1644
0.1494
0.1345
0.1196
0.1046
0.0897

14
15
16
17
18
19

3.125
2.813
2.500
2.250
2.000
1.750

0.0749
0.0673
0.0598
0.0538
0.0478
0.0418

20
21
22
23
24
25

1.5
1.375
1.250
1.125
1.000
0.875

0.0359
0.0329
0.0299
0.0269
0.0239
0.0209

26
27
28
29
30

0.750
0.688
0.625
0.563
0.500

0.0179
0.0164
0.0149
0.0135
0.0120


Home | Gallery | New Machines | Used Machines | Parts/Tooling | Leasing | Service | Advertising
Copyright © 2007-2017 Three Rivers Machinery. All rights reserved.
Three Rivers Machinery -- 1079 East Windhaven Road -- Pittsburgh, PA 15205 -- Map
Phone (412) 921-2800 7AM-5PM EST -- 24/7 Fax (412) 921-2801 -- info@sheetmetalmachinery.com