Wilson J Cubides

Art Materials Service Inc.
625 Joyce Kilmer Ave.
New Brunswick, NJ 08901
Controlling slug pulling

Controlling slug pulling with hole lapping

January 15, 2008


Diemakers have several options for slug-pulling problems, such as knockout pins, vacuums, punch or die dulling, oil viscosity, wire EDM hole slots, punch/die clearance changes, edge shearing, mechanical grippers, air jets, and cuped-shaped punches. Another method to help stop slug pulling is bell- mouthing the die, which essentially involves cutting a funnel shape around the hole.

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