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American Whitney Hand Tools

Tonnage Calculator

Enter Punch Diameter in Decimal:

Ga.

3/16"

1/4"

5/16"

3/8"

1/2"

In.

.036

.048

.062

.075

.105

.120

.135

.188

.250

.312

.375

.500

Enter Material Thickness in Decimal:

Choose Material Multiplier:

Click this button to calculate your Tool Tonage Required:

This is your Tool Tonnage Required:

This is the recommended Clearance for your Dies:

These are your recommended
American Whitney Hand Tools:

#1 Hand Tool:
#2 Hand Tool:
#45 Hand Tool: Discontinued
#91 Bench Mounted Press:
#92 Bench Mounted Press:

Determining Die Clearance

In order to receive optimum performance from a punch and die, it is necessary that the proper die clearnace be provided in the die for the material being pierced. As a general rule, proper die clearance should run 10% to 20% of the thickness of the material being pierced.

CLEARANCE
GAGE	.006 CL	.021 CL*	.037CL**
22 ga. thru 14 ga.	X
12 ga. thru 5/32"		X
3/16" thru 1/4"			X
* Use next 1/64" larger die with .006 CL (i.e. for 1/4" (.250) hole use 17/64" (.2716) Die ** Use next 1/32" larger die with .006 CL (i.e for 1/4" (.250) hole use 9/32" (.2872) Die