Din 509-e0.6x0.2 !!exclusive!! -

: Shown as a zoomed-in detail (Detail X) with all geometric dimensions and surface finish requirements (e.g., adding cap R sub a

This specific designation defines the geometry of the relief groove: Din 509-e0.6x0.2

When you see “DIN 509-E 0.6x0.2” on a drawing, recognize it not as a trivial relief, but as a precisely engineered micro-feature that embodies the principle that great engineering is often found in the details you can barely see. : Shown as a zoomed-in detail (Detail X)

DIN 509, DIN 509-E 0.6x0.2, undercut machining, stress relief groove, micro-grooving, precision turning, miniature shaft relief, Form E undercut. DIN 509-E 0.6x0.2