Patent ID: 7246419

Claim:
A tool for use in providing a predetermined clearance between an impeller and a shroud each mounted about a central axis of a jet engine assembly, wherein the shroud has a mating surface, and the impeller and at least a portion of the shroud are disposed within a casing having a mating surface, wherein the shroud mating surface and casing mating surface are configured to mate with an inlet housing having corresponding inner and outer mating surfaces, respectively, the inlet housing having a distance between the planes in which the inner and outer mating surfaces lie, the tool comprising: a hub having first and second sides, an opening extending therethrough, and a plurality of bores, the first side having first and second mating surfaces configured to mate with the shroud mating surface and the casing mating surface, respectively, the hub having distance between the planes in which the first and second mating surfaces lie, wherein the hub distance is less than the inlet housing distance, and the plurality of bores extending between the hub first and second sides each bore configured to receive a fastener to couple the hub to the jet engine assembly.