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Ironworkers Punch and Die Information  

Press-TypeHere you will find useful information pertaining to all sorts of recommendations for correct punch and die clearance, set-up, use, ordering information and more. We hope you find it beneficial.

Punch and Die Clearance

When using punches and dies it’s very important to use the correct die clearance in relationship to the punch size. Good results are obtained by using the guidelines below to determine die clearance.

 

Punch & Die clearances (For A-36 and Mild Steel) FOR Punch to Die....
generally follow requirements by material thickness below.

CLEARANCE FOR A-36 and MILD STEEL MATERIALS
Recommended clearance for punching

MATERIAL THICKNESS

RECOMMENDED CLEARANCE

1/4" to 1/2"

1/32"

1/2" to 3/4"

1/16”

3/4" to 1”

3/32”

1” and over

1/8”

 

MISCELLANEOUS CLEARANCE FOR OTHER MATERIALS
Recommended clearance for punching

Clearance added to punch size (% of material thickness)

MATERIAL

BEST

MINIMUM

MAXIMUM

Aluminum, Soft

10

5

15

Brass, ½ Hard

11

6

16

Copper, ½ Hard

12

8

16

Steel, 0.50% C

18

12

24

Stainless Steel

18

12

24

For special applications, any clearance required can be manufactured to fit your requirements on a "special order" basis.

 CLEARANCE FOR GAUGE STOCK
Recommended clearance for punching

SIZE

APPROX. THICKNESS

CLEARANCE ADDED TO PUNCH SIZE

30

.0120

Slip fit

29

.0135

Slip fit

28

.0149

Slip fit

27

.0164

Slip fit

26

.0179

Slip fit

25

.0209

.002

24

.0239

.002

23

.0269

.002

22

.0299

.003

21

.0329

.003

20

.0359

.003

19

.0418

.003

18

.0478

.005

17

.0538

.005

16

.0598

.005

15

.0673

.007

14

.0747

.007

13

.0897

.010

12

.1046

.010

11

.1196

.010

10

.1345

1/64

9

.1494

1.64

8

.1644

1/64

7

.1793

1/64

ORDERING Punch and Die Information

When ordering punches and dies, please check the number stamped on your existing punch and die that you are currently using on your machine. Common punch numbers are F-16, F-20 and F-26 and common dies are F-55, F-59 and F-62. With this number we can identify the length, diameter and design of the punch or die in question. Your next consideration is shape. We can provide round, square, rectangle, oblong, hex & even special shapes (provided a drawing is submitted to accurately determine your requirements).

Should require a “crossed keyway” or a “single keyway” in the head of a punch or “locators (Whistle Notch**)” in your dies for shaped tooling remember to ask for this at the time you place your order.

** Single or double (Indexed at 90 degrees) Whistle Notches can be finished.

 
   

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