1.We are run the inner diameter, inner grooves and total lenght finish in the operation no1,and we are check the inner diameter for every parts but total lenght and inner grooves checked after every 25 ns. 2.while clamping the part, in the butting face chips will butted so faceout occured in the running part and half of the part total lenght meassures 0.4 to 0.5 undersized but not observed the
operator.  
