1. Allowable burr height of punching parts (1) limit value of burr of blanking parts It is not allowed that the burr of blanking parts exceeds a certain height. The limit value of burr height of stamping parts (mm) is shown in the table below.  (2) marking requirements for burrs in design drawings *Burr direction: … Continue reading Knowledge of structural design of sheet metal parts (VIII): Allowable height of burr of punching parts