509e06x02 Exclusive: Din

) : This is the rounding radius of the groove, measured in millimetres. 0.2 (Depth

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. din 509e06x02 exclusive

) : This represents the depth of the recess from the cylindrical surface, also in millimetres. Key Dimensions for Type E 0.6 x 0.2 ) : This is the rounding radius of