Excessive trimming is typified by a flattened area on the seal’s O.D. and/or I.D. (see Figure 62). This flattening results in an out-of-tolerance (I.D. to O.D. measurement) condition. Keep in mind that problems can result even if “excessive” trimming is avoided. Imperfect trimming or buffing to remove flash can result in a much coarser seal surface. Both excessive trimming and buffing are the result of improper removal of flash. (For maximum acceptable trimming, see Table 26.)

QUALITY ASSURANCE MAIN PAGE