The designation DIN 509 E 0.6x0.2 refers to a specific type of relief groove (undercut) according to the German technical standard
. This standard defines the geometry of undercuts used to provide clearance for subsequent machining or assembly on turned parts and in bores. Technical Breakdown
: Specifies a form intended for workpieces where the planar surface (shoulder) is not subjected to high fatigue loads and does not require special treatment. It is primarily used when the cylindrical surface may need further machining but the shoulder does not. : This value represents the of the undercut in millimeters. : This value represents the of the recess in millimeters. Key Specifications Description The curvature at the bottom of the groove. The penetration depth into the workpiece. Surface Roughness (Standard) Standard roughness is typically unless otherwise specified. Application Rotational Parts
Used on turned shafts or in bores to allow grinding tools or mating parts to reach the corner. Usage Context Din 509-Relief Grooves | PDF | Machining - Scribd
The feature you are looking for is a DIN 509 Type E undercut with specific dimensions of Feature Overview: Type E
In technical drawings, an undercut is a clearance groove at the inner corner of a rotationally symmetric part. The variant is specifically designed for workpieces where: cylindrical surface is intended for subsequent machining (like grinding). planar surface
(shoulder) does not require high precision or is not subjected to high fatigue loads. din 509e06x02 exclusive
It is often used when the mating part has a large counterbore or will not contact the shoulder. Dimensional Specifications DIN 509 standards size has the following standard parameters: Applicable Diameter ( Recommended for workpiece diameters ranging from Summary Table E (Undercut for one machining surface) Standard Width ( Workpiece Diameter ( is greater than 10 surface roughness requirements for this undercut size? Undercut TableDIN 509 | PDF | Machining - Scribd
The technical specification DIN 509 E 0.6 x 0.2 refers to a standard Type E relief groove (undercut) defined by the German Institute for Standardization (DIN 509). These grooves are used in mechanical engineering to provide clearance for machining tools or to ensure that mating parts can sit flush against a shoulder. Technical Details of E 0.6 x 0.2 In the designation E 0.6 x 0.2:
Type E: Indicates an undercut suitable for workpieces with a planar shoulder where the cylindrical surface is the primary focus for subsequent machining. 0.6: This is the radius (r) of the groove in millimeters. 0.2: This is the depth (t1) of the groove in millimeters. Application Guidelines
According to DIN 509 standards, this specific size (0.6 x 0.2) is generally recommended for workpieces with a diameter range of 10 mm to 18 mm.
When to use Type E: Choose this form when the shoulder does not face high alternating loads and you primarily need to ensure the tool has enough room to finish the cylindrical section without hitting a sharp corner.
Machining Specs: The standard typically requires a surface roughness ( Racap R sub a ) of approximately , unless otherwise specified on the technical drawing. The designation DIN 509 E 0
Drawing Callout: On a professional blueprint, you would see it labeled as Undercut DIN 509 – E 0.6 x 0.2. Forms and dimensions of undercuts
The designation DIN 509 E 0.6 x 0.2 refers to a specific type of relief groove (also called an undercut) used in mechanical engineering for turned parts and bores. These grooves provide clearance for subsequent machining tools (like grinding wheels) and ensure mating parts can sit flush against a shoulder. Specification Details
According to the DIN 509 standard, the "E 0.6 x 0.2" designation breaks down as follows:
Type E: A relief groove used when only the cylindrical surface (the shaft) requires further machining, and no high fatigue load is expected on the planar shoulder. 0.6 (Radius ): The radius of the undercut profile is 0.6 mm. 0.2 (Depth ): The radial depth of the groove is 0.2 mm. Technical Dimensions
For this specific size, the standard typically specifies the following additional dimensions to ensure proper tool clearance: Value (mm) Radius Depth Breadth (Width) Run-out Angle 15° (Standard for Type E) Application Guidelines Workpiece Diameter (
): This specific groove size is generally recommended for workpieces with diameters over 10 mm up to 18 mm. Hot DI water rinse (80°C, 2 minutes)
Surface Finish: Standard roughness for these surfaces is typically ), though tighter tolerances like can be specified in the drawing.
Usage: It is ideal for parts where the mating component has a large counterbore or will not contact the planar shoulder.
For further technical documentation, you can refer to detailed guides on Scribd or engineering reference sites like Engineers Edge. Din 509-Relief Grooves | PDF | Machining - Scribd
Dimensions in mm. Corresponding diameter d1 b. Type ±0,1 g workpieces. +0,1 +0,05 +0,2 subjected to subjected to higher. Din 509-Relief Grooves | PDF | Machining - Scribd
No part leaves the line without a certificate of conformance listing bath chemistry logs, thickness measurements (X-ray fluorescence - XRF), and salt spray test results from a control coupon.
In regulated markets, internal trigger mechanisms require thin rust prevention without changing the part's functional geometry (sear engagement surfaces). DIN 509E06X02 exclusive offers a dry-film lubricant that prevents carbon fouling adhesion.
Why would an engineer specify an "exclusive" variant instead of a standard DIN 509 Fe/Zn6c? The answer lies in four critical performance metrics: