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In mild steels, material thicknesses of 1/4 inch through 5/8 inch should have a total punch to die
clearance of 1/32 inch. (Punch diameter + 1/32" = Die diameter.) 3/4 inch thick mild steel should have a
minimum of 1/16 inch clearance. (Punch diameter + 1/16" = die diameter.)
In thin materials, the recommended punch to die clearance is 1/10 of the material thickness.
We do not recommend less than 1/64 inch total clearance, due to working clearances necessary in the
punch ram and the punch bushing.
For capacities, REFER TO THE PUNCH TONNAGE CHART IN FIGURE 9 BELOW.
FIGURE 9
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