LARGE DISPLACEMENT HYDROSTATIC WORKPIECE HOLDER

摘要

A hydrostatic tool holder having a displaceable metal sleeve formed wit h a plurality of circumferentially spaced and longitudinally extending slots a nd a flexible, polymeric ring defining at least in part a fluid chamber to separate the flu id in the chamber from the sleeve to prevent the fluid from escaping through the slots in the sleeve. The slots in the metal sleeve enable a large displacement of the sleeve through the polymeric ring so that the hydrostatic tool holder may be used with workpiec es having rough finishes, such as cast metal workpieces like cylinder liners for internal combustion engines, which as cast have relatively rough surfaces and relatively low dimensional accuracy.