PEM's stress-free process removes metal atom by atom to produce fully-formed gears
High quality gears for precision meters are machined burr-free, six at a time, in a standard PEMTec machine. Although surface finish is material dependent, many materials are machined to very smooth finishes, with some as good as 1-4 in Ra. PEM machining is a full form precision machining process that usually starts with a solid blank or a preform of the component geometry. The electrode used to machine the turbine wheels in this example is a negative of the turbine wheel geometry less the machining gap for electrolyte. Eight turbine wheels are machined in one 45-minute machining cycle.