Din 509e06x02 Exclusive File

The designation follows a strict standardized format that communicates critical dimensions to CNC programmers and machinists:

: This specifies an undercut intended for workpieces where only the cylindrical surface is intended for subsequent machining (like grinding). It is used when the planar (shoulder) surface does not face high fatigue loads. 0.6 (Radius din 509e06x02 exclusive

The keyword refers to a highly specific mechanical engineering specification for a Type E relief groove (undercut) as defined by the German Institute for Standardization (DIN) . In precision manufacturing, these undercuts are essential for ensuring that mating parts—such as a shaft and a bearing—can fit perfectly against a shoulder without interference from the naturally occurring radius left by a cutting tool. The designation follows a strict standardized format that