General Rules for Tolerances of Glass and Ceramic Preforms

Minimum tolerances of diameters (outside and inside)

< .100″ +/− .001″
.100″ – .200″ +/− .002″
.200″ – .350″ +/− .0025″
.350″ – .500″ +/− .003″
.500″ – 1.000″ +/− .004″
1.00″ and up +/− .005″

Length tolerance is a minimum +/− .002″
Weight Tolerances

0 mg – 7 mg mean +/− 5%
7 mg – 500 mg mean +/− 2.5%
500 mg and up mean +/− 2%

(Tolerances maybe adjusted up or down depending on circumstance)

For additional information and specifications, please contact us.

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