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BELL SYSTEM TECHNICAL JOURNAL 



of the die opening as shown on the tool drawing, Fig. 15, the required 

 datum holes are then located by means of the vernier scales and 

 bored to complete the master plate, as shown in Fig. 16. The 



Fig. 16 — Master plate for solderless cord tip die. 



Fig. 17 — Transferring datum lioles from master plate to die block on bench lathe. 



practice on master plates of this kind and other similar parts is to locate 

 the various holes so that the error in any case is well within .001 in. 



