Numerica Credit Union offers customer support via their website at www.numericacu.com. You can also contact Numerica Credit Union via phone at (800) 255-9194 or email at NCUMemberService@numericacu.com.
Electrical discharge machining. Electrical discharge machining (EDM), also known as spark machining, spark eroding, burning, die sinking, wire burning or wire erosion, is a manufacturing process whereby a desired shape is obtained by using electrical discharges (sparks).
Electrical discharge machining - Advantages and disadvantages. 1  Advantages of EDM include machining of... 2  Complex shapes that would otherwise be difficult to produce with conventional cutting tools. 3  Extremely hard material to very close tolerances.