They are run primarily on vertical turret lathe (VTL) machines. The impellers are very large, expensive, one-of-a-kind parts with complex profiles, grooves and tolerances as tight as ☐.0005 inch. Shaft-to-impeller keys are used for extra stability in high-pressure and high-power applications. The impellers are stress relieved, machine finished, statically and dynamically balanced, spin tested, and mounted with an interference-fit onto the shaft. Finally, A Comprehensive Software Solution Designed for Small Job Shopsįor one particular application-impeller manufacturing-Elliott Group uses five-axis milling to ensure the quality of the advanced designs.
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