Patent ID: 9427839
Filing Date: 2016-08-30
CPC Classification: B24B

Claim Text:
1. A lapping tool for lapping sealing surfaces of a fitting used in a gas turbine, comprising: a shaft having first and second ends and a longitudinal axis; a removable handle attached to the second end of the shaft; and first and second removable lapping inserts, each having an outwardly extending attachment portion for attachment to the first end of the shaft, wherein the lapping inserts each include a lapping surface which corresponds to the shape of a sealing surface of the fitting and wherein: the first lapping insert includes a cavity defining a tapered lapping surface for receiving and lapping an exterior surface of a first portion of the fitting; and the second lapping insert includes a projection defining a tapered lapping surface for insertion into and lapping an interior surface in a second portion of the fitting, wherein the second portion of the fitting forms a receptacle portion for sealingly receiving the first portion of the fitting.