—- Deep Draw Fundamentals: Part 5

Deep drawn metal stampings can be classified into 3 categories, simple, average & difficult. Simple drawn parts usually have the following characteristics; Straight one diameter shell, no critical visual requirements, corner radius equal to 3 times material thickness or greater, an overall length of 1 ½ to 2 ½ times the diameter of the part, an overall length tolerance of plus or minus .005, a wall thickness of .010 – .020 and a tolerance for the outside or inside diameter of the part of plus or minus .002.

An average drawn part may be a two or three step diameter shell, average visual requirements, corner radius 3 times material thickness or greater, overall length 2 ½ to 3 ½ times the diameter of the part, an overall length tolerance of plus or minus .005, a .012 – .025 wall thickness and an outside diameter or inside diameter tolerance of plus or minus .001.

Next time we will examine characteristics of difficult part types.