Electrode tube (also called electrode copper pipe, drilling machine with brass) is a special electrode discharge machining holes, processing a variety of small deep hole and blind hole, the products are copper, brass, bronze pipe, existing specifications phi 0.*0~ Phi 1.*0, widely used in wire cutting mould of threading hole; spinneret orifices; sieve hole group; panels of flushing hole; engine cooling holes; nozzle orifice; papermaking, chemical fiber, food and other industries filter pore. Whether the surface of the machined part is a curved surface or an inclined plane, it can be processed by a high speed, and the depth of the hole is more than **0.