TwinTurbo.NET: Nissan 300ZX forum - It's probably some sort of tool and cavity number
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Subject It's probably some sort of tool and cavity number
     
Posted by megaDan on April 01, 2015 at 12:23 PM
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In Reply To Significance of 2-1,2-2,1-2 Turbo Inscriptions posted by OverZealous (CT) on March 28, 2015 at 07:07 PM
     
Message You can tell by looking at them that they don't change, they're part of the mold so it is not a reference to lot number or some sort of date code. We use the same type of permanent cavity identification in investment casting.

You'd be surprised at how many individual parts (across all industries) have markings, numbers, etc that don't relate to the function, revision, or variety of the piece whatsoever. I prefer to use pin blips to differentiate cavities or revisions as it doesn't increase the rate of defectives in the manufacturing process and is only noticeable if you're really looking for it.

     
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