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

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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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