According to DIN 509 standards , this specific size (0.6 x 0.2) is generally recommended for workpieces with a diameter range of .
Following the "x," the value 0.2 denotes the depth (t) of the cut, also measured in millimeters. This is the vertical distance from the original surface of the shaft down to the bottom of the groove. For a 0.6 mm radius, a depth of 0.2 mm is standard. This shallow depth ensures structural integrity is maintained while providing just enough clearance for a grinding wheel or threading tool to run out. It is important to note that while the "0.6 mm" refers to the radius (the curve), the "0.2 mm" refers to the depth . Some applications may refer to a simplified notation like "DIN 509-E1x0,2," where the "1" refers to a larger radius of 1 mm; however, "E06X02" specifically indicates the smaller, more fine-detail undercut of 0.6mm radius.
To enhance structural integrity and chemical resistance.
This size is generally recommended for workpieces with diameters over 10 mm up to 18 mm Comparison with Other Types Din 509-Relief Grooves | PDF | Machining - Scribd
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A specific geometry of undercut designed for scenarios where a perpendicular shoulder must be maintained for assembly (often used where parts don't require high fatigue resistance).
: A relief groove suitable for workpieces where only the cylindrical surface requires subsequent machining (like grinding), and the planar shoulder does not have high fatigue requirements. Standard Surface Roughness: µm, unless otherwise specified on the drawing. Application & Use Cases Tool Clearance:
Recesses into both the face wall and the shaft floor at a 15-degree angle.
: Specifies a single-surface relief groove. Form E is typically selected for components where the face plane (shoulder) serves as the primary functional mating surface, but the adjacent cylindrical diameter does not require an additional recess. 06 (Radius
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