EDM SPINDLE ASSEMBLY WITH FLUID SEAL

摘要

An EDM spindle assembly is provided comprising a pull stud, an electrode holder, a fluid seal, and a seal holder. The electrode holder comprises a tail end, a nose end, and an electrode accommodating passage. A counter bore comprising a threaded inside diameter is formed in the tail end of the electrode holder. The seal holder comprises a threaded outside diameter, a tail end, a nose end, and an electrode accommodating passage. The seal accommodating space is formed in the tail end of the seal holder. The threaded outside diameter of the seal holder is suitable for threaded engagement with the threaded inside diameter of the counter bore. The pull stud comprises a threaded outside diameter, a tail end, a nose end, and an electrode accommodating passage. The threaded outside diameter of the pull stud is suitable for threaded engagement with the threaded inside diameter of the counter bore. The threaded inside diameter of the counter bore in the electrode holder comprises a longitudinal threading dimension that is sufficient to accommodate the entire longitudinal threaded outside diameter of the seal holder and a significant portion of the longitudinal threaded outside diameter of the pull stud, with the fluid seal positioned in the seal accommodating space.