<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Hi All,</DIV><DIV> I noticed in the parker o ring hand book they don't actually have a listing for a 1/2" shaft under the dynamic (rotary) o ring seal section, the closest they come is .491 and then they indicate the bore as .503 . I would rather just use a stock 1/2" shaft , is it kosher to keep that tolerance of .012 by just increasing the bore diameter? </DIV><DIV> </DIV><DIV>The static listing shows shaft at .500 and the bore at .502 +/- .003</DIV><DIV> </DIV><DIV>On the reciprocating list they show .499 and the bore at .501 +/- .003</DIV><DIV> </DIV><DIV>I'm using a #014</DIV><DIV> </DIV><DIV> </DIV><DIV> </DIV><DIV>Brian</DIV></DIV>