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BELL SYSTEM TECHNICAL JOURNAL 

 Die Records 



Die control is greatly enhanced by comprehensive records. All dies are 

 logged' on individual record cards. A facsimile of each side of this card is 

 shown in Fig. 4. As noted, the individual die characteristics as received, 

 at oversize, and after recutting to final disposition are recorded. These 



Fig. 4 — Facsimile of a die record card 



cards are periodically correlated to the daily machine performance sheets 

 by mechanical tabulation to obtain the die life. 



Shop Die Control 



All drawing dies are grouped in sets for use and matched for balance in 

 relation to their diameters. This is necessary because of the minimum slip 

 characteristics of the drawing machines. It is also a convenient means to 

 reduce machine down time. The sets are used in the drawing machines as 

 units. Replacements and rematchings are made in the Die Shop. Definite 



