... any spot on the surface Product No./NameJJ-00202 / CNC turning part for electrode bar Machining Capability1) Material: Aluminum, Aluminum ... , turning, milling, tapping, drilling, polishing, punching, etc... 4) Tolerance: +/-0.002 cm5) Appliacation Fields: engine parts, industrial components, Communications,, ... Tolerance: +/- 0.0005 inch, also accord with GB6414 CNC turning part for electrode bar