Results For Form 1 Sample QC Verification Data
(Tolerances of Location)

Referenced Sample Drawing (unknown source)

Findings:

Analysis:

1. Since the position of hole #1's (left of the shown vertical center line) allowed tolerance zone of .028" is less than the calculated actual .0297," this hole is out of allowed tolerance by .0017."   Consequently it is to be rejected. The recommended corrective action is to enlarge the hole size by at least .0017" being sure not to exceed the maximum hole diameter of .149" within the present hole location.
   

2. The position of hole #2's (right of the shown vertical center line) allowed tolerance zone (based on the MMC principle) calculation equals .032" and is larger than the calculated actual position of .0305" by .0015."  Therefore, no corrective action is needed.
   

3. In addition to the stated findings regarding the holes position to their respective origins, the hole pattern (both holes together) would be allowed to shift by ½ the difference between the feature designated as R2.49 (+/-.010, title block tol.) Datum-B under MMC, and the actual radius size of 2.486." The allowed hole pattern shift would be .003,"* and only after Hole #1 is brought to full positional tolerance requirement.
   

Important Notes:

The answers provided herewith are limited to the best interpretation and analysis by TP staff of the unaudited data submitted.  Due to the underlying principles of GDT, the characteristics of design and product development, and implied as well as specified processing requirements through GDT callouts, it is imperative that the answers provided are to be used cautiously.  While every attempt was made to provide an accurate and substantive interpretation and analysis of the data submitted in accordance with ANSI Y14.5M-1982 and/or ASME Y14.5M-1994 Dimensioning and Tolerancing Standard, a miscommunication of data could sway the wrong conclusion here just as it does on the shop floor.

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This concludes the analysis of your submission, however, should you have any questions relating to this or other GDT data, please let us hear from you.  You may reach us by E-mailing info@techedusa.com.

Nick Vrajich, Ph.D. Technical Education Consultant TPI Technical Programs International

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